CN112189524B

CN112189524B - Prevention and control method for allium fistulosum adults

Info

Publication number: CN112189524B
Application number: CN202011071610.2A
Authority: CN
Inventors: 王付彬
Original assignee: JINING CITY ACADEMY OF AGRICULTURAL SCIENCES
Current assignee: JINING CITY ACADEMY OF AGRICULTURAL SCIENCES
Priority date: 2020-10-09
Filing date: 2020-10-09
Publication date: 2022-08-09
Anticipated expiration: 2040-10-09
Also published as: CN112189524A

Abstract

The invention belongs to the technical field of pest control in garlic cultivation, and particularly relates to a method for controlling alligator fly adults. The method comprises the following steps: 1) carrying out the study on the population dynamic change rule of the alligator sinensis flies, mastering the occurrence dynamics of the alligator sinensis flies and determining the peak period of the occurrence of the alligator sinensis flies; 2) after the garlic seedlings emerge, the mulching film is subjected to film breaking treatment by adopting dragging film breaking or beating film breaking; 3) adopting a blue pest sticking plate to carry out pest sticking treatment in any growth process of the garlic; 4) 50 percent of clothianidin WG and 2 percent of perchloro-emamectin benzoate EC are adopted for controlling together. According to the invention, by carrying out the dynamic monitoring of the alligator flyer population, the time for intensively spraying and killing the alligator flyers is determined, the prevention and control larvae are changed into prevention and control adults, and the prevention and control means of trapping and killing the adults by using the insect sticking plate, dragging and breaking the membrane to prevent the adults from laying eggs, combining chemical agents and the like are adopted, so that the effective control on the alligator flyers adults is realized.

Description

Prevention and control method for allium fistulosum adults

Technical Field

The invention belongs to the technical field of pest control in garlic cultivation, and particularly relates to a high-efficiency method for controlling adult green onion flies.

Background

The Allium fistulosum Delia antimqua (Meigen), abbreviated as "Allium fistulosum fly" (onion fly), belongs to Diptera, anthomyidae, Delia, Geranium. The chirita flies have strong odor tendency (Liu Guo fen, 2007), and the chirita flies can be induced to lay eggs by the smells of the chirita flies, such as rotten flies, incised flies, rotten sows and bolting. The scallion fly larvae are commonly called garlic maggots, which have serious harm to garlic bulbs, and the occurrence of the garlic maggots is closely related to the garlic growing period, cultivation measures, planting environment and the like. Garlic maggots have a light-shielding habit, when being damaged, the garlic maggots often dig into skins and eat garlic bulbs to cause the bulbs to form holes, incomplete and emit odor, light plants are withered and withered, the bulbs are rotten, heavy plants are withered in a large area, and the yield of partial field blocks is reduced by over 40 percent. In recent years, along with the continuous cropping and planting of garlic, the occurrence of garlic maggots is increased year by year.

At present, the root irrigation of organic phosphorus medicaments is mainly used for preventing and controlling the garlic maggots in production, and the single medicament is applied for a long time to continuously enhance the drug resistance of the garlic maggots, so that the application amount and the application times of the medicament are increased in the production, and a vicious circle is formed. Therefore, the method aims to explore safe, efficient and three-dimensional comprehensive prevention and treatment measures.

In recent years, chemical agents such as phoxim and the like are excessively used for pursuing garlic yield and economic benefit, so that the drug resistance of alligator garlic is rapidly increased, the garlic pesticide residue exceeds the standard seriously, the original ecological balance of a farmland is broken, and the selection of green and effective prevention and control measures is particularly important.

Patent document CN109197471A claims a method for preventing and controlling garlic maggots, which is to uniformly spread lime nitrogen on the ground surface of the garlic planting land 10-15 days before garlic planting and water, wherein the lime nitrogen is decomposed in water to generate cyanamide and dicyandiamide in the soil, so as to kill pathogenic bacteria such as pythium and phytophthora in the soil and residual garlic maggots and ova thereof in the soil, and simultaneously provide effective calcium source and slow-release nitrogen fertilizer, so as to provide nutrition for garlic and enhance the stress resistance of garlic. However, cyanamide and dicyandiamide generated by lime nitrogen in soil have certain pollution effect on soil, and the garlic yield can be reduced for several years after fertilization.

Patent document CN105265502A discloses a method for using fly maggot killing medicine, which comprises the following steps: A. ditching around the vegetable roots, wherein the depth of the ditch is 8cm, and 5g of the fertilizer is sowed around each vegetable root; covering a coating after broadcasting; B. spreading control drugs on the soil surface around the vegetable roots, and spreading 4-8g of control drugs around each vegetable root; C. when the step B is operated, selecting the time for spraying the powder after rain or fog; D. furrowing around the Chinese cabbage furrow with a depth of 30-40cm, and scattering 1kg of the pesticide in each furrow as a broken insect prevention and protection furrow; the components of the control drug are dimethoate missible oil, plant ash, 7% dipterex powder, chlorothalonil powder, wood dust, fructus cnidii powder and radix stemonae powder. In the patent, dimethoate missible oil is used as an insecticide, which not only has influence on the quality of garlic products, but also destroys the balance of a soil ecosystem.

Patent document CN107950261A discloses a method for controlling garlic diseases and pests, which comprises the following steps: (1) before sowing, deeply ploughing soil, sunning upturned soil for more than 15 days, fully decomposing base fertilizer, watering garlic in a rotten mother period in time, and applying ammonia water or ammonium bicarbonate in combination with irrigation, 2, uniformly scattering 50% phoxim 1kg and sandy soil 100 kg into a sowing ditch before sowing, and 3, spraying and irrigating roots in middle ten days of 4 months by using 40% methyl isosalix 1000 times liquid and 2% abamectin 2000 times liquid, and continuously spraying for 3 times once every 10-15 days. The use of phoxim as an insecticide in the patent can cause the pesticide residue in the garlic to exceed the standard and influence the market sale of the garlic.

Therefore, the invention of a reasonable, efficient, green and pollution-free method for preventing and controlling the adult chive flies is urgently needed.

Moreover, the inventor finds in research that the existing garlic planting field has a general technical difficulty: the planting mode of the garlic main producing area is mulching cultivation, the cultivation mode effectively prevents the alligator flies from laying eggs around the garlic roots, and the damage of garlic maggots is reduced. However, after the garlic seedlings emerge, the garlic roots and the mulching film form holes due to artificial film breaking, the garlic roots and the mulching film are not in close contact, the garlic roots and the surrounding soil are wet, an ideal place is provided for the chironomia to lay eggs, and the egg laying amount of the chironomia is increased. Therefore, on one hand, the adult chironomid needs to be controlled; on the other hand, in the process of controlling the alligator sinensis adults, further prevention of larva generation is needed.

Through retrieval, the prior art does not report the technical problem of increasing the egg laying amount of the chironomia flies caused by artificial rupture of membranes.

Through retrieval, no patent reports exist for a method for controlling the alligator sinensis adults by adopting a new technology of preventing and controlling adult alligator sinensis adults by adopting a pest sticking plate for trapping and killing the adult alligator sinensis, dragging and breaking membranes to prevent the adult alligator sinensis from spawning, infecting garlic maggots by entomopathogenic lines and the like.

Disclosure of Invention

In order to solve the technical problems, the invention provides a method for preventing and controlling adult Allium fistulosum flies, which comprises the step of carrying out membrane breaking treatment on a mulching film in a dragging membrane breaking mode or a broom flapping membrane breaking mode after garlic seedlings emerge.

The method for preventing and controlling the alligator flies adult is also characterized in that a blue insect sticking plate is adopted for carrying out insect sticking treatment in any growth process of garlic.

In the method for preventing and controlling the adult chirita flies, the dragging and film breaking are realized by rubbing the mulching film with a heavy and soft cotton material to help seedlings to break the film; the broom beating is to use broom or broom analog with small gap to beat the film to help the seedling to come out.

In the prevention and control method, the blue pest sticking plate consists of an adhesive and a bottom plate, the wavelength of the reflected light of the bottom plate is 450 +/-10 nm, and the bottom plate is made of PVC.

In order to further effectively inhibit and control the adult chive flies, spraying is carried out in the peak period of the adult chive flies, and the spraying adopts 50wt% of clothianidin WG and 2wt% of perchloro-emamectin benzoate EC; administration ofThe amount is: 50wt% clothianidin WG preparation amount of 10g/667m ² 2wt% of perchloromethylate EC preparation amount of 60g/667m ² ；

The specific spraying method comprises the following steps: four sprays were made during the peak period of adult emergence, the first and third sprays of 50wt% clothianidin WG, at the following application rates: dosage 10g/667m ² (ii) a Spraying 2wt% perchloro emamectin benzoate EC for the second time and the fourth time, wherein the dosage is 60g/667m ² The agent is diluted by water and sprayed to the leaves of garlic plants each time, and the water consumption for spraying is 60kg/667m ² ；

Preferably, the time interval between each spraying of the pesticide is 6-10 days.

More specifically, the invention provides a method for preventing and controlling adult chirita flies, which comprises the following steps:

1) researching the dynamic change rule of the alligator flys population, mastering the occurrence dynamic of the alligator flys and determining the peak period of the alligator flys;

2) after the garlic seedlings emerge, the mulching film is subjected to film breaking treatment by adopting dragging film breaking or beating film breaking;

3) adopting a blue pest sticking plate to carry out pest sticking treatment in any growth process of the garlic; the specific operation method comprises the steps of hanging blue insect sticking plates in the garlic field at equal intervals, wherein the distance between the lower edge of the blue plate and garlic sprouts is 10-15 cm during hanging, and replacing the blue insect sticking plates every 7-21 days.

And 3) carrying out insect sticking treatment by adopting a blue insect sticking plate in the peak period of the adult alligator flies in the growth, wherein the peak period of the adult alligator flies in the step 3) is obtained by researching the dynamic variation law of alligator flies population in the step 1), and the peak period of the adult flies is determined to occur in the last ten days of 11 months in winter to the last ten days of 12 months or in the last ten days of 3 months in the spring of the next year to the last ten days of 4 months by the step 1).

The method for preventing and controlling the alligator sinensis adults comprises the following steps: 1) carrying out the study on the dynamic change rule of the alligator flyblow population, mastering the occurrence dynamics of the alligator flyblow and determining the peak period of the occurrence of the alligator flyblow adults;

2) after the garlic seedlings emerge, the film is broken by pulling or beating; the dragging rupture of the film is realized by rubbing a mulching film by adopting a cotton material or an analogue thereof with soft weight to help seedling rupture of the film; the mulching film is slightly beaten by a broom or a broom analog with fine pores to help the seedlings to emerge;

3) adopting a blue armyworm plate for armyworm treatment in any growth process of the garlic; the blue insect sticking plate consists of an adhesive and a bottom plate, the wavelength of the reflected light of the bottom plate is 450 +/-10 nm, and the bottom plate is made of PVC;

preferably, the method comprises the following steps:

1) monitoring the population dynamics of the alligator sinensis flies, determining the alligator sinensis flies as the peak period of control in the late 11 months-late 12 months in winter and in the late 3 months-late 4 months in the spring of the next year, and performing spray control;

2) hanging blue insect sticking plates at equal intervals in the whole growth period of garlic, wherein the lower edge of the blue plate is 10-15 cm away from garlic sprouts during hanging, and replacing the blue insect sticking plates every 7-21 days; the wavelength of the reflected light (450 +/-10) nm is 450 nm, and the material is a PVC plate;

3) when the film-covered garlic grows out of the ground by 1.5-2cm, blocking the egg laying of the alligator flies by adopting a mode of dragging film breaking or flapping film breaking; the steps of pulling and breaking the membrane are as follows: rubbing the mulching film by using a cotton material with soft weight, helping seedling to break the film, and dragging once in the morning and evening for two days; the step of beating and breaking the membrane comprises the following steps: the mulching film is lightly beaten by a large broom, the seedlings are helped to emerge from the film by utilizing the gap on the broom, and the film is beaten once in the morning and at night for two days;

4) adopting a wide vegetable insect-killing self-propelled boom sprayer in the peak period of adult occurrence, adjusting a spray head into spray shape, adding water to dilute the pesticide, spraying the pesticide on the leaves of garlic plants, wherein the water consumption for spraying is 60Kg/667m ² (ii) a The spraying agent adopts 50wt% of clothianidin WG and 2wt% of perchlorometalate EC; the application amount is as follows: 50wt% clothianidin WG preparation amount of 10g/667m ² 2wt% of perchloromethylate EC preparation amount of 60g/667m ² ；

The spraying method comprises the following steps: four sprays were made during the peak period of adult emergence, the first and third sprays of 50wt% clothianidin WG, at the following application rates: dosage 10g/667m ² (ii) a Spraying 2wt% perchloro emamectin benzoate EC for the second time and the fourth time, wherein the dosage is 60g/667m ² The agent is diluted by water and sprayed to the leaves of garlic plants each time, and the water consumption for spraying is 60kg/667m ² ；

The time interval between each spraying of the pesticide is 6-10 days.

The invention follows the principle of prevention as main and comprehensive control, and explores reasonable and efficient prevention and control measures aiming at different growth forms of the alligator flies.

Due to different climates, the dynamic change rules of the alligator fistulosa populations of different producing areas are different, the study on the dynamic change rules of the alligator fistulosa populations is carried out, the occurrence dynamics of the alligator fistulosa is mastered, the peak time of the occurrence of the alligator fistulosa is determined, large-area general control is timely carried out according to the occurrence dynamics of the alligator fistulosa, and the control effect can be greatly improved. The prevention and control of garlic maggots are changed into the prevention and control of adults, the adults are sprayed and killed in a centralized way, the number of larvae is greatly reduced, the population density of the garlic maggots is controlled within an economic threshold value, and the pesticide application amount of the garlic field is reduced.

The insect sticking plate trapping and killing technology is to utilize the taxis of the scallion flies to specific color and some chemical smell based on the life habit of the scallion flies to reach the aim of killing adult insects. The pest sticking plate has long trapping and killing duration, does not influence garlic, has the advantages of no pesticide residue, no environmental pollution, low cost and the like, and is an important physical control and biological control technology for preventing and controlling the scallion flies.

The inventor finds that the existing garlic planting field has a ubiquitous technical problem in research: the planting mode of the garlic main producing area is mulching cultivation, the cultivation mode effectively prevents the alligator flies from laying eggs around the garlic roots, and the damage of garlic maggots is reduced. However, after the garlic seedlings emerge, the garlic roots and the mulching film form holes due to artificial film breaking, the garlic roots and the mulching film are not in close contact, the garlic roots and the surrounding soil are wet, an ideal place is provided for the chironomia to lay eggs, and the egg laying amount of the chironomia is increased. The present inventors have surprisingly found a solution to the above technical problem in their research: on the basis of a garlic film covering cultivation mode, the alligator oviposition blocking technology helps garlic sprouts to come out of films by means of a special production tool for dragging and breaking the films, so that the garlic roots are tightly combined with a mulching film, the alligator oviposition around the garlic roots is successfully blocked, and the damage of the garlic maggots is reduced. The dragging film breaking device is simple in structure and convenient to operate, can adapt to fields of different sizes, compares with manual film breaking and beating film breaking, greatly improves garlic bud film breaking rate and film breaking work efficiency, reduces labor intensity and reduces labor cost.

In the aspect of chemical control, the inventor develops the matching use of two medicaments so as to achieve the aim of effectively controlling the onion flies, namely, a wide vegetable insect killing self-propelled boom sprayer is adopted in the peak period of adult occurrence, a spray head is adjusted to be in a spray shape, the medicaments are diluted by water and then sprayed to the leaf parts of garlic plants, and the water consumption for spraying is 60Kg/667m ² (ii) a The agent used for spraying was 50wt% clothianidin WG and 2wt% perchlorometalate EC.

The soft cotton material mentioned in the invention is a cotton material or a cotton material analogue commonly used in the field, and can be cotton cloth, cotton wool, non-woven fabric, terylene fabric and the like.

The broom is a tool with small gaps, which is prepared from crop straws such as bamboo branches and broomcorn, sweet wormwood straw or plastics and the like, and is commonly used in the field, and can be a bamboo broom, a broomcorn broom, a sweet wormwood broom, a plastic broom and the like.

In the invention, physical control and chemical control are combined, oviposition is blocked in an adult stage, and possible larvae are controlled, so that the purpose of excellent prevention and control effect on the chironomia flies is achieved.

The invention has the beneficial effects that:

1. according to the invention, the optimal operation time for carrying out allium fistulosum fly system prevention and control is determined by carrying out dynamic monitoring on allium fistulosum fly species groups;

2. screening out a pest sticking plate with the best trapping and killing effect, and physically trapping and killing to control a part of scallion flies;

3. aiming at the cultivation mode, a chive maggot oviposition blocking mode is adopted, the chive maggots are further prevented from oviposition to block the garlic maggots, and the garlic maggots are prevented from being transformed into adult worms again; the control effect is improved;

4. the low-toxicity and small-dose chemical agent is used, and the purpose of efficiently preventing and controlling the scallion flies is achieved by combining the physical method.

Drawings

FIG. 1 shows that fly species population of garlic cloves sowed in autumn in 2019 is dynamic;

FIG. 2 shows the fly population dynamic in 2018 autumn sowing Allium fistulosum;

FIG. 3 shows the effect of different color plates on the trapping and killing of Allium fistulosum flies;

FIG. 4 shows the growth and growth dynamics of larvae of Allium cepacia in different membrane-breaking modes;

FIG. 5 is a graph showing the variation of the population number of the alligator flies controlled by the spray of the chemical.

Detailed Description

The present invention will now be further described with reference to specific embodiments in order to enable those skilled in the art to better understand the present invention.

With respect to the present invention, the inventors have conducted the following studies: firstly, carrying out dynamic monitoring on allium fistulosum fly species groups, and providing scientific operation time for carrying out allium fistulosum fly system prevention and control in a centralized manner; secondly, carrying out the prevention effect evaluation of the insect sticking plate for trapping and killing the green onion flies, and determining the trapping and killing effects of the insect sticking plates with different colors; thirdly, developing the research of the onion fly oviposition obstructing technology and exploring the optimal membrane breaking technology for obstructing adult oviposition; fourthly: the field control effect evaluation of chemical agents for preventing garlic maggots is developed, and the prevention effect and the optimal field use amount are determined. Through the research, the invention reduces the use amount of chemical pesticides in the garlic production and provides technical support for the safe production of garlic.

Materials and methods

1.1 overview of the test materials and the test sites

Test insect sticking plates: the specification of the blue insect sticking plate (called a blue plate for short) is 15cm multiplied by 25cm, the wavelength of reflected light is 450 +/-10 nm, and the material is a PVC plate;

the yellow plate has a specification of 15cm multiplied by 25cm, a reflected light wavelength (575 +/-10) nm and is made of a PVC plate.

Reagent to be tested: 50% of clothianidin WG (Jinan Lvba pesticide Co., Ltd.), and 2% of perchloro-emamectin benzoate EC (Dengen rich chemical industry Co., Ltd.).

The test arrangement is at the test base of agricultural science and research institute in Jining City, garlic is sown in one row every 10 months and 7 days, and each 667m ² The seed consumption is 180kg, the row spacing is 20cm, the plant spacing is 13cm, and each 667m ² Number of plants 260About 00 plants. The cultivation conditions (variety, soil type, fertilization, density, etc.) and cultivation measures of all the test districts are uniform and consistent.

Example 1

Test method

Monitoring the population dynamics of the allied fistular fly, and determining the peak period of prevention and control, wherein the method comprises the following steps:

in 667m ² Hanging 15 pieces of blue plates in the garlic field at equal intervals, wherein the distance between the lower edge of the blue plates and garlic sprouts is 10-15 cm when the blue plates are hung, surveying every 7d, recording the number of the scallion flies, and simultaneously replacing the blue plates. The results of the experiment are shown in FIGS. 1 and 2.

The number of allium fistulosum fly colonies is dynamically regulated: as can be seen from FIG. 1, the number of the Allium cepa L.population in the autumn sowing garlic field is dynamic and mainly appears in the peak period of two seasons of winter and spring. The peak periods in winter of the number of the allium fistulosum colonies sowed in autumn in 2018 and 2019 occur at 26 days in 11 months and 9 days in 12 months respectively, the average pest trapping amount per week of each blue board is 280.50 and 73.25 respectively, and the number of the allium fistulosum flies is sharply reduced along with the reduction of the air temperature after the peak value; in the late 3 months of the next year, the weather is warm again, overwintering pupas begin to hatch into adults, the peak period comes from the beginning of spring, the peak period respectively occurs at 25 days in 3 months and 6 days in 4 months, the average pest trapping amount per week of each blue board is 233.00 and 57.25 respectively, and then the number of the scallion flies gradually decreases along with the rising of the air temperature and the decline of garlic plants. In summary, the number of the allium mongolicum regel seed groups in the garlic field sowed in autumn is dynamic, the peak period mainly occurs in winter and spring, particularly the number is the largest in the last ten days of 11 months in winter to the last 12 months in winter and in the last ten days of 3 months in spring next year to the last 4 months in winter, and the allium mongolicum regel seed groups are an important period for preventing and controlling allium mongolicum regel flies by large-area centralized spraying in the field. Therefore, the peak period of the control is defined as the peak period of the control from 11 late of winter to 12 late of winter and from 3 late of spring to 4 late of winter.

Example 2

The method comprises the following steps of selecting a proper insect sticking plate through the effect of trapping and killing the green onion flies by the insect sticking plate:

to prove the trapping and killing effect of Huangban and Lanban on Allium cepa Linnaeus in the garlic field, it is in 667m ² 15 insect sticking plates are hung on the garlic field at equal intervals, the number of the green onion flies is investigated and recorded every 7 days, and the insect sticking plates are replaced at the same time. The results of the use are shown in FIG. 3.

As can be seen from FIG. 2, in the whole growth cycle of garlic, the four peak values of the number of onion flies trapped and killed by the blue plate are 280.50, 233.00, 145 and 145.25 respectively, the four peak values of the number of onion flies trapped and killed by the yellow plate are 65.00, 33.25, 26.50 and 20.25 respectively, the dynamic range of the number of onion flies trapped and killed by the blue plate is basically consistent with that of the number of onion flies trapped and killed by the yellow plate, but the dynamic line of the blue plate is obviously higher than that of the yellow plate, i.e. the number of onion flies trapped and killed by the blue plate is obviously higher than that of the yellow plate. Therefore, the two-color pest sticking plate has the best trapping and killing effect by using the blue plate.

Example 3

Allium fistulosum fly oviposition separation

When the film-coated garlic is unearthed for 1.5-2cm, 3 treatments are set, wherein the treatment comprises the following steps: dragging and rubbing to break the film, namely, rubbing the mulching film by using a cotton material with soft weight to help seedling and break the film, and dragging for 1 time in the morning and at night for two days continuously; and (3) treatment 2: patting the mulching film with a big broom, helping the seedlings to come out of the film by utilizing gaps on the broom, and patting for 1 time in the morning and at night for two days continuously; and (3) treatment: manually using sharp objects such as branches and iron wires to open holes on the film so as to expose garlic sprouts. Each treatment was repeated 4 times in random block arrangement with a cell area of 20m ² . And (3) adopting a 10-point sampling method, investigating 10 plants at each point, investigating every 7d, and recording the number of all larvae on each root in each investigation. The results of the experiment are shown in FIG. 4.

As can be seen from FIG. 4, the population number of the Allomya cepacia larvae in the three membrane rupture modes is basically consistent, and the emergence period of the Allomya cepacia larvae in winter is from 11 to 12 months. The peak period of manual perforation and membrane rupture is about 12 months and 2, the peak period of broom beating and membrane rupture occurs about 11 months and 25, and the occurrence amount of all plants in the garlic field of manual perforation and membrane rupture, broom beating and membrane rupture is respectively 36.25, 15 and 10, so that the treatment of broom beating and membrane rupture effectively promotes the garlic sprouts to come out of the membranes, and because the pores are small, the onion flies are more effectively prevented from laying eggs around the garlic roots, and the damage of garlic maggots is effectively reduced; in the aspect of working efficiency, the dragging rupture of the membrane is higher than the broom flapping rupture of the membrane and the manual perforation rupture of the membrane; in the aspect of damage degree of the film, the dragging rupture of the film is slightly lower than the beating rupture of the film by a broom, the dragging rupture of the film is greatly lower than the manual perforation rupture of the film, and the dragging rupture of the film has the highest effective blocking effect on egg laying of the chironomidae. By combining the analysis, the effect of blocking the egg laying of the chironomia flies by the dragging and membrane breaking mode is optimal.

Example 4

And (3) green onion fly adult medicament spray prevention and control test: according to the dynamic results of monitoring the alligator fly population in the embodiment 1, the peak period of adult emergence occurs from 11 late months to 12 early months in winter or from 3 late months to 4 early months in spring of the next year, the specific time of the adult spraying test is determined in that spraying tests are continuously carried out for 4 times in the afternoon of 11 20 days, 27 days, 4 days and 11 days of 11 months in 2019, the operating area is 200 mu, and 200 mu of unoperated garlic field is selected as a comparison.

Test site: jinxiang county national modern agriculture industrial park test base in Jinning City

Testing equipment: self-propelled boom sprayer for broad vegetable insecticide (model 3WPZ-5000GX 2)

Test agents: adopting a wide vegetable insect-killing self-propelled boom sprayer in the peak period of adult occurrence, adjusting a spray head into spray shape, adding water to dilute the pesticide, spraying the pesticide on the leaves of garlic plants, wherein the water consumption for spraying is 60Kg/667m ² (ii) a The spraying agent adopts 50wt% of clothianidin WG and 2wt% of perchlorometalate EC; the application amount is as follows: 50wt% clothianidin WG preparation amount of 10g/667m ² 2wt% of perchloromethylate EC preparation amount of 60g/667m ² ；

The test method comprises the following steps: selecting 667m in spray control operation region and non-spray control operation region ² Hanging 30 blue insect sticking plates in the garlic field at equal intervals, investigating every 3d after spraying, recording the number of the green onion flies, and continuously investigating 10 times by replacing the insect sticking plates.

And (3) test results: as can be seen from FIG. 5, the number of the alligator species population is obviously reduced after the pesticide spray control is carried out on the garlic field, and the shorter the time interval from the spray is, the lower the population number is, which indicates that the 50wt% clothianidin WG and 2wt% perchloro-emamectin benzoate EC spray control can suppress the number of the alligator species population. However, because the spraying area is limited, along with the loss of the pesticide effect of the pesticide, the flight ability of the alligator flies is very strong, and the fragrant smell emitted by the garlic in the rotten mother period is induced, the alligator flies in the non-spraying area can be diffused to the spraying area to influence the control effect, so that the large-area general control is carried out in the main production area of the garlic, and the control effect of the alligator flies is improved.

Example 5

With reference to the methods of embodiments 1 to 4, the prevention and control method of the present invention includes the following steps:

(1) researching the dynamic change rule of the alligator flys population, mastering the occurrence dynamic of the alligator flys and determining the peak period of the alligator flys; the monitoring result shows that: the peak period of prevention and control is defined as the late 11-12 days in winter and the late 3-4 days in spring of the next year;

(2) during the whole growth period of garlic, at 667m ² Hanging 15 pieces of blue plates in the garlic field at equal intervals, wherein the distance between the lower edge of the blue plates and garlic sprouts is 10-15 cm when the blue plates are hung; the specification of the blue plate is 15cm multiplied by 25cm, the wavelength of the reflected light (450 +/-10) nm is, and the blue plate is made of a PVC plate;

(3) when the film-covered garlic grows out of the ground by 1.5-2cm, blocking the egg laying of the alligator flies by adopting a mode of dragging film breaking or flapping film breaking; the steps of dragging and breaking the membrane are as follows: rubbing the mulching film by using a cotton material with soft weight, helping seedling to break the film, and dragging once in the morning and evening for two days; the step of beating and breaking the membrane comprises the following steps: the mulching film is lightly beaten by a large broom, the seedlings are helped to emerge from the film by utilizing the gap on the broom, and the film is beaten once in the morning and at night for two days;

The spraying method comprises the following steps: high incidence of imagoSpraying four times in the peak period, and spraying 50% clothianidin WG for the first time and the third time, wherein the application amount is as follows: dosage 10g/667m ² (ii) a Spraying 2% perchloro emamectin benzoate EC for the second time and the fourth time, wherein the dosage is 60g/667m ² The agent is diluted by water and sprayed on the root of the garlic each time of spraying, and the water consumption for spraying is 60kg/667m ² ；

The time interval between each spraying of the pesticide is 6-10 days.

The method is adopted to control the alligator flies, and the control effect of the alligator flies is evaluated, and the result shows that the control rate of the alligator flies adult can reach about 99.8%. The field has only few onion flies, and almost no onion flies. This further demonstrates the superiority of the method of the invention. The prevention and control rate is calculated based on the number of the alligator flies in the past year (the average value of the number of the alligator flies in the same plot, which is not monitored by the prevention and control method provided by the invention, in 2016-2018 for three consecutive years). The percentage of the number of onion flies in 2019, which was measured by the method of the present invention, compared with the number of onion flies in the past year, and then the value obtained by subtracting the above percentage from 100%.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A method for preventing and controlling adult chirita flies comprises the following steps:

1) monitoring the population dynamics of the allied fistular onion flies in 667m in the whole growth cycle of the garlic ² Hanging 15 blue plates in the garlic field at equal intervals, wherein the distance between the lower edge of the blue plate and garlic sprouts is 10-15 cm when the blue plates are hung, investigating every 7d, recording the number of the green onion flies, and simultaneously replacing the blue plates, wherein the specification of the blue plates is 15cm multiplied by 25cm, the wavelength of reflected light is 450 +/-10 nm, and the blue plates are made of PVC plates;

determining the peak period of the prevention and control from 11 late month to 12 late months in winter and from 3 late month to 4 late months in spring of the next year, and performing spray prevention and control;

2) when the film-covered garlic grows out of the ground by 1.5-2cm, the egg laying of the alligator flies is blocked by adopting a dragging film-breaking or flapping film-breaking mode, and the egg laying of the alligator flies around the garlic roots is more effectively blocked due to small pores, so that the damage of garlic maggots is effectively reduced; the steps of pulling and breaking the membrane are as follows: rubbing the mulching film by using a cotton material with soft weight, helping seedling to break the film, and dragging once in the morning and evening for two days; the step of beating and breaking the membrane comprises the following steps: the mulching film is lightly beaten by a large broom, the seedlings are helped to emerge from the film by utilizing the gap on the broom, and the film is beaten once in the morning and at night for two days;

3) adopting a wide vegetable insect-killing self-propelled boom sprayer in the peak period of adult occurrence, adjusting a spray head into spray shape, adding water to dilute the pesticide, spraying the pesticide on the leaves of garlic plants, wherein the water consumption for spraying is 60Kg/667m ² (ii) a The spraying agent adopts 50wt% of clothianidin WG and 2wt% of perchlorometalate EC; the application amount is as follows: 50wt% clothianidin WG preparation amount of 10g/667m ² 2wt% of perchloromethylate EC preparation amount of 60g/667m ² ；

The spraying method comprises the following steps: four sprays were made during the peak period of adult emergence, the first and third sprays of 50wt% clothianidin WG, at the following application rates: dosage 10g/667m ² (ii) a Spraying 2wt% perchloro emamectin benzoate EC for the second time and the fourth time, wherein the dosage is 60g/667m ² The agent is diluted by water and sprayed to the leaves of garlic plants each time, and the water consumption for spraying is 60kg/667m ² (ii) a The time interval between each spraying of the medicament is 6-10 days;

the garlic is cultivated every 667m ² The seed consumption is 180kg, the row spacing is 20cm, the plant spacing is 13cm, and each 667m ² The number of strains was 26000.