CN114711069A - Comprehensive prevention and control method for pitaya root-knot nematodes - Google Patents

Comprehensive prevention and control method for pitaya root-knot nematodes Download PDF

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CN114711069A
CN114711069A CN202210371272.7A CN202210371272A CN114711069A CN 114711069 A CN114711069 A CN 114711069A CN 202210371272 A CN202210371272 A CN 202210371272A CN 114711069 A CN114711069 A CN 114711069A
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dragon fruit
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CN114711069B (en
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唐景美
韦优
卓福昌
黄丽君
赵静
周彩霞
蒋娟娟
卢美瑛
孔方南
颜桢灵
周之珞
韦雪英
周婧
罗培四
李文砚
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Guangxi South Subtropical Agricultural Science Research Institute
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    • A—HUMAN NECESSITIES
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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
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    • A01G22/00—Cultivation of specific crops or plants not otherwise provided for
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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G31/00—Soilless cultivation, e.g. hydroponics
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
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    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
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    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
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Abstract

The invention discloses a comprehensive control method of dragon fruit root-knot nematodes, which comprises three plates: (1) daily prevention of the dragon fruit root-knot nematodes, namely, preventing and controlling biological agents, supplementing nutrient solution, (2) preventing and controlling the dragon fruit root-knot nematodes at the initial stage, performing drenching application of medicaments, (3) preventing and controlling the dragon fruit root-knot nematodes at the later stage, culturing by combining root cutting with a new root system, and introducing the biological agents for prevention and control; by means of the control according to local conditions and pertinently according to the disease conditions of the planting field, the control effect is good, the control period is long, the occurrence probability of the root-knot nematode diseases of the dragon fruits can be effectively reduced, meanwhile, the dragon fruit plants with the diseases can be quickly rescued, the production can be recovered, and the production loss can be reduced.

Description

Comprehensive prevention and control method for pitaya root-knot nematodes
Technical Field
The invention belongs to the technical field of plant protection, and particularly relates to a method for preventing and controlling root-knot nematodes of pitaya.
Background
The dragon fruit is a cultivated variety of plants of Cactaceae and genus Hylocereus, has fleshy shrub climbing, rich fruit nutrient content, is popular with consumers, and has high economic benefit, the yield per mu is 6000 plus one, the yield per mu can reach 1.5-2.5 ten thousand yuan according to 2.5 yuan per jin, and the dragon fruit is put into production quickly, planted in the same year, and the yield in the same year can reach 1500 plus one 3000 jin. The domestic dragon fruit planting area is continuously increased, according to relevant statistics, the domestic planting area reaches 100 ten thousand mu in 2020, and a planting main production area taking Guangxi, Guangdong, Hainan, Yunnan and Guizhou as the core is formed.
As the area of the dragon fruit is continuously enlarged, the diseases and insect pests of the dragon fruit are more and more serious, wherein the root-knot nematode of the dragon fruit is the most serious disease which damages the dragon fruit. The harm of root-knot nematode to dragon fruit can cause the branches of dragon fruit plants to become thin, yellow, shriveled and finally withered. The serious plots of the dragon fruit root-knot nematodes can reduce the yield greatly, and cause serious economic loss. At present, in the production of pitaya, the root-knot nematode is mainly prevented and controlled by the fosthiazate, the use concentration of the fosthiazate is higher and higher due to continuous use of the same medicament in successive years, the prevention and control cost is also increased year by year, and the prevention and control effect of the fosthiazate is poorer and poorer due to too single medicament, so that the root-knot nematode generates drug resistance.
Disclosure of Invention
In order to solve the problems, the invention provides a comprehensive prevention and control method for the dragon fruit root-knot nematodes, which comprehensively prevents and controls the dragon fruit root-knot nematodes by paying attention to prevention and control in the daily planting management process and simultaneously taking measures of medicament prevention and control, nutrition supplementation, root breaking and the like at the initial stage and the later stage of the dragon fruit root-knot nematodes, reduces and reduces the occurrence probability of the diseases of the dragon fruit root-knot nematodes, and simultaneously rapidly rescues the diseased dragon fruit plants, recovers the production and reduces the production loss.
In order to achieve the purpose, the scheme provided by the invention is as follows:
the comprehensive prevention and control method for the root-knot nematodes of the pitaya comprises the following three plates:
(1) pityrosporum ovale daily prevention
a) Preventing a land parcel of newly planted dragon fruits, namely uniformly stirring the organic fertilizer and the fosthiazate granules together with soil before planting the dragon fruits and after ridging;
b) preventing the dragon fruits after planting, respectively applying 1-2 times of biological bacteria agent to prevent root-knot nematodes at the beginning of 4 months and at the beginning of 9 months every year, and applying the biological bacteria agent to the roots of each dragon fruit;
c) fertilizing, namely spraying the nutrient solution for 1-2 times every month from 3 months to 12 months to strengthen the nutritional requirement of the pitaya, and fertilizing under the condition that the weather is clear and the soil is moist;
d) root cutting treatment, namely cutting roots in 12 months every year from the second growth year, ditching and cutting roots at a position 30-40cm away from the main root of the dragon fruit planting row, cutting only a single-side root system every year, cutting the other side root system in the next year, and cutting the roots on the two sides of the planting row left and right alternately;
(2) early-stage prevention and control of dragon fruit root-knot nematode
The lateral roots of the dragon fruit plants have root knots, the main root has only a small number of 1-2 root knots, the plants can also grow normally, but the fleshy stems of the fruiting plants are shrunken, and the dragon fruit plants at the initial stage infected with root-knot nematodes exist; for the dragon fruit plots with the conditions, the root application is carried out by selecting a medicament, and the main root and the soil within the range of 20cm of the main root are applied in a drenching manner; the preparation is 500 ml/mu of microcapsule emulsion of 30% fosthiazate, 20ppm of 90% sodium naphthalene acetate, 10ppm of indoleacetic acid and 1000-time solution of 30% metalaxyl-hymexazol suspending agent, the preparation is uniformly mixed with water, and the water consumption per mu is 1 t;
(3) late-stage prevention and control of dragon fruit root-knot nematode
When the root knot of the root-knot nematode is fully distributed on the main root of the dragon fruit and almost no fibrous root exists, the root cutting method is adopted for preventing and treating;
a) cutting roots, namely cutting pulp and stems of the dragon fruits at a position 10cm above the ground, removing the cut roots and the root knots of the underground parts, and cutting flowers and fruits of the dragon fruits under the condition that the plants do not recover the tree vigor;
b) protecting new roots, namely placing a root protection bag at the root cutting position of the dragon fruit, and filling a soilless substrate into the root protection bag; leading the new root of the dragon fruit to grow in the root protecting bag; when the plants recover green and the root systems reach the soil layer 30-45 days later, applying the biological bactericide for 1 time to start fruit retention; usually, the fruit can be remained after 1 to 2 months of root cutting; 1-2 fruits are remained in the first batch of fruits after root cutting, and the fruits can be normally remained after the second batch of fruits.
Preferably, in the prevention process of the new-planted pitaya land blocks, the dosage of the fosthiazate granules is 1.5kg per mu, and the dosage of the organic fertilizer is 2 tons per mu.
Preferably, the biological agent is a mixed solution of paecilomyces lilacinus, bacillus subtilis and biogas slurry.
Preferably, the mass ratio of the paecilomyces lilacinus, the bacillus subtilis and the biogas slurry in the biological agent is 1:1:1000-1500, and the paecilomyces lilacinus, the bacillus subtilis and the biogas slurry are uniformly mixed and then applied by spraying.
Preferably, the nutrient solution is a solution prepared by mixing biogas slurry and peanut bran, and the mass ratio of peanut bran water to biogas slurry is 1: 100-150.
As the optimization of the technical scheme, the width of the trenching row is 5-8cm, the depth is 20cm, and the length is matched with the dragon fruit planting row. The purpose of ditching row is to dig the dragon fruit root system of planting row one side absolutely, and one side root system of every dragon fruit plant just is dug absolutely like this, can promote new root to grow out, increases the vigor of root, improves dragon fruit output, and the root system of one side keeps the nutrient absorption demand that can guarantee the plant in addition, and selects 12 months in winter, and the growth is comparatively slow this moment, and has accomplished the fruit and pick, and the injury to the plant is less.
Preferably, the medicament for the initial prevention and treatment of the pitaya root-knot nematode is used for 1 time every 15-20 days and is continuously used for 2 times.
Preferably, the soilless substrate is prepared from coconut chaff: organic fertilizer: the mass ratio of vermiculite is 44: 5: 1.
preferably, the root protection bag is formed by splicing single plastic shell plates, a plurality of air holes are formed in the plastic shell plates, and a left upper oblique opening and a left side inserting opening connected with the left upper oblique opening are formed in the left side of the plastic shell plates; the right side is provided with a right lower bevel opening and a right side socket connected with the right lower bevel opening; in the installation, the left side socket passes through the block mode and is connected with the right side socket cooperation, forms the root guard bag.
The invention has the following beneficial effects:
1. compared with the existing field planting method, which is not suitable for local conditions and does not perform unified prevention and treatment according to the disease conditions of the field, the method provided by the invention uses various methods to perform prevention and treatment on the pitaya planting fields with different disease degrees, so that a better prevention and treatment effect is obtained, and the prevention effect period is longer.
2. At present, most bases use a single chemical agent for preventing and treating the dragon fruit root-knot nematodes, the prevention and treatment effect is increasingly poor, and the cost is also increasingly high. The invention uses biological agents for routine daily prevention two to three times all the year around, can achieve the target by using a small amount of chemical agents such as fosthiazate and the like, greatly reduces the usage amount of the chemical agents, and has low harm to the environment.
3. The fosthiazate aqueous emulsion conventionally used in the field at present can only kill larvae well, and can not kill eggs, the invention prevents the occurrence of root-knot nematodes, and the paecilomyces lilacinus, bacillus subtilis and biogas liquid are combined, and the used paecilomyces lilacinus can parasitize eggs, and can infect larvae and female worms, so as to inhibit the infection of the root-knot nematodes; the bacillus subtilis can improve the utilization rate of a chemical fertilizer, inhibit crops from absorbing nitrate nitrogen, heavy metals and pesticides, purify and restore soil, promote the growth of the root system of the pitaya and ensure the root quantity of the pitaya in a fruit producing period.
4. The biogas liquid is added into the biological agent and the nutrient solution, so that the root-knot nematodes can be prevented, and the biogas liquid is alkaline, so that the acid soil can be improved, and the incidence of the root-knot nematodes can be reduced.
5. According to the invention, peanut bran water is added into the nutrient solution, so that the rooting of the dragon fruits can be promoted, and the resistance of the dragon fruit plants can be improved.
6. According to the invention, in the daily production management process, the mode of alternately cutting roots is adopted from the second growth year, so that the requirement of nutrition absorption of the dragon fruits is met, the growth of new roots can be promoted, the root activity is increased, the yield of the dragon fruits is improved, the yield of the dragon fruits in the second year is not influenced but increased by adopting the alternate mode, the root quantity can be increased by two years of treatment, the residual roots of old and weak diseases are reduced, and the probability of harm of root-knot nematodes to the dragon fruits is reduced.
7. The invention provides a method for preventing and treating the dragon fruit root-knot nematode by using a root-cutting method aiming at the later-stage plants of the dragon fruit root-knot nematode for the first time, so that the source of the dragon fruit root-knot nematode can be fundamentally removed, meanwhile, the dragon fruit can be rapidly saved, and the production can be recovered. After the root is cut, the root is contacted with the soil layer, and the biological agent is used for preventing and controlling, so that the prevention and control effect can be prolonged, and the probability of being damaged by root-knot nematodes is reduced after new roots grow out of the plant.
8. The root protection bag is used after cutting the root, and the soilless substrate is used in the root protection bag. The main root of the dragon fruit plant greatly reduces the infection probability of the root-knot nematode. Meanwhile, the root protection bag is assembled and made of durable plastic materials, and part of the root protection bag can be repeatedly utilized according to damage conditions after prevention and treatment are finished, so that resources are saved.
Drawings
Fig. 1 is a schematic view of the installation of a root guard bag.
Fig. 2 is a schematic view of the deployment of the root guard bag.
Names and serial numbers of the components in the figure: 1-plastic shell plate, 2-air hole, 3-left upper bevel, 4-left side socket, 5-right side socket and 6-right lower bevel.
Detailed Description
The invention is further described with reference to the following examples:
example 1
In 2019, a 10-mu land of a new planting land block of the dragon fruits in Longzhou county in Chong-left city is selected for planting the dragon fruits, and the following method for preventing and treating the root-knot nematodes of the dragon fruits is adopted:
a) preventing a land parcel of the newly planted dragon fruit, and uniformly stirring the organic fertilizer and the fosthiazate granules together with soil after ridging before planting the dragon fruit for 3 months; the dosage of the fosthiazate granules is 1.5kg per mu, and the dosage of the organic fertilizer is 2 tons per mu. And then, planting normal dragon fruit plants, planting 1000 dragon fruit plants per mu averagely, and performing daily planting management.
b) Preventing the pitaya after planting, respectively applying 1 time of biological bactericide to prevent root-knot nematodes at the beginning of 4 months and 9 months every year, and directly applying the biological bactericide to the root of each pitaya;
the biological agent is prepared by uniformly mixing paecilomyces lilacinus, bacillus subtilis and biogas slurry in a mass ratio of 1:1:1500, and then performing spraying application, wherein the spraying application amount is 1000ml per plant.
c) And (3) fertilizing, namely spraying the nutrient solution for 1 time every 3 to 12 months to meet the nutritional requirement of the pitaya, and fertilizing under the conditions that the weather is clear and the soil is moist (the humidity is more than 60%). The nutrient solution is a solution prepared by mixing biogas slurry and peanut bran water, the mass ratio of the peanut bran water to the biogas slurry is 1:150, and the dosage is 1000ml per plant.
d) Root cutting treatment, namely cutting roots in 12 months in winter every year from the second growth year (2020), and ditching and cutting roots in a position 30cm away from the roots of the dragon fruit planting rows; the width of the trenching row is 5-8cm, the depth is 20cm, and the length is matched with the dragon fruit planting row.
The left root system is cut off in the winter in 2020, and the right root system is cut off in 2021.
e) Treating dragon fruit plants with initial symptoms of dragon fruit root-knot nematode: root application is carried out on symptom plants and 2-3 plants connected on the same planting line by using medicaments, soil within the range of a main root and a main root of 20cm is drenched, the medicaments are 500 ml/mu of microcapsule emulsion of 30% fosthiazate, 20ppm of 90% sodium naphthalene acetate, 10ppm of indoleacetic acid and 1000 times of suspension of 30% metalaxyl-hymexazol, the medicaments are uniformly mixed with water, the water consumption per mu is 1t, and then the drenching application is carried out; the preparation is administered 1 time every 15 days and 2 times continuously.
Through three-year observation, the growth of the dragon fruit plants is recorded in table 1 below.
TABLE 1 comprehensive prevention and control record of Pityrosporum ovale
Figure BDA0003588752820000051
Example 2
In a Deng village dragon fruit planting base in a tung town of Longan county of Longan city, south Guangxi Ning, 9 months in 2020, 82 dragon fruit plants show the initial symptoms of dragon fruit root-knot nematodes; because the traditional method is not effective enough in the early prevention and treatment process, other 35 dragon fruit plants have already developed the late symptoms of the dragon fruit root-knot nematodes. And (4) taking treatment measures aiming at the planting base with the 117 symptoms of the root-knot nematodes of the pitaya. The specific method comprises the following steps:
(1) firstly, root application is carried out by using a medicament, and the main root and soil within the range of 20cm of the main root are drenched; 500 ml/mu of microcapsule emulsion with 30% fosthiazate as a medicament, 20ppm of 90% sodium naphthalene acetate, 10ppm of indoleacetic acid and 1000 times of suspension of 30% metalaxyl-hymexazol are uniformly mixed with water, the water consumption per mu is 1t, and then drench fertilization is carried out, wherein the control is carried out on plants with root-knot nematode symptoms and connected plants without symptoms; the preparation is administered 1 time every 15 days and 2 times continuously.
(2) Prevention and treatment of late-stage symptom plants of root-knot nematodes of pitaya
The 35 plants which develop the later symptoms of the root-knot nematodes of the dragon fruits are prevented and controlled by a root cutting method;
a) cutting roots, namely cutting pulp and stems of the dragon fruits at a position 10cm above the ground, removing the cut roots together with the root knots of the underground parts, digging out, moving out of a planting field for treatment, and cutting off the flowers and fruits of the dragon fruits under the condition that the plants do not recover the tree vigor;
b) protecting new roots, namely placing a root protection bag at the root cutting position of the dragon fruit, and filling a soilless substrate into the root protection bag, wherein the formula of the soilless substrate is coconut chaff: organic fertilizer: the mass ratio of vermiculite is 44: 5: 1; inserting the fleshy stem part at the cut into a soilless substrate, keeping the soilless substrate moist, and leading the new root of the dragon fruit to grow in the root protection bag; when the plants return to green and the root systems reach the soil layer in about 30 days, applying the biological agent for 1 time to start fruit retention; usually, the fruit can be remained after 1-2 months of root cutting; 1-2 fruits are remained in the first batch of fruits after root cutting, and the fruits can be normally remained after the second batch of fruits.
The biological agent is prepared by uniformly mixing paecilomyces lilacinus, bacillus subtilis and biogas slurry according to the mass ratio of 1:1:1000, and then performing spraying, wherein the spraying amount is 1000ml per plant.
The root protection bag is formed by splicing a single plastic shell plate 1, a plurality of air holes 2 are formed in the plastic shell plate, and a left upper bevel opening 3 and a left side socket 4 connected with the left bevel opening are formed in the left side of the plastic shell plate; the right side is provided with a right lower bevel joint 6 and a right socket 5 connected with the right lower bevel joint; in the installation, left side socket 4 is connected with right side socket 5 cooperation through the block mode, forms and protects a root bag.
And (3) recording an experimental result:
1. 82 dragon fruit plants with early symptoms of dragon fruit root-knot nematode are treated for 1 month by root application of a medicament, the situation that the fleshy stems of the plants are shrunken gradually improves, after 45 days from the first root application, 64 plants recover normal growth, and after 60 days, 82 dragon fruit plants all recover normal growth.
2. After 35 dragon fruit plants with late symptoms of the dragon fruit root-knot nematode are inserted into the soilless substrate after the roots are broken, 28 plants grow new roots in 7 days, and 35 plants grow new roots after 14 days, so that the survival is recovered. For the dragon fruit plants growing new roots in 7 days, fruits are remained after 1-1.5 months according to the growth tree vigor; after 7 days, new roots grow out, and the fruit retention is started after the root system is properly prolonged to 2 months. After treatment, the 35 dragon fruit plants all recovered to normal growth situation after 3 months, and all the plants had fruit.
The method of the invention carries out combined comprehensive prevention and treatment measures according to the growth condition of the pitaya in the planting field.
Although the present invention has been described with reference to the specific embodiments, it should 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.

Claims (9)

1. The comprehensive prevention and control method for the dragon fruit root-knot nematode is characterized by comprising the following steps: the plate comprises the following three plates:
(1) pityrosporum ovale daily prevention
a) Preventing a land parcel of newly planted dragon fruits, namely uniformly stirring the organic fertilizer and the fosthiazate granules together with soil before planting the dragon fruits and after ridging;
b) preventing the dragon fruits after planting, respectively applying 1-2 times of biological bacteria agent to prevent root-knot nematodes at the beginning of 4 months and at the beginning of 9 months every year, and applying the biological bacteria agent to the roots of each dragon fruit;
c) fertilizing, namely spraying the nutrient solution for 1-2 times every month from 3 months to 12 months to strengthen the nutritional requirement of the pitaya, and fertilizing under the condition that the weather is clear and the soil is moist;
d) root cutting treatment, namely cutting roots in 12 months every year from the second growth year, ditching and cutting roots at a position 30-35cm away from the roots of the dragon fruit planting rows, cutting only one-side root system every year, cutting the other root system in the next year, and cutting the roots on the two sides of the planting rows left and right alternately;
(2) early-stage prevention and control of dragon fruit root-knot nematode
The lateral roots of the dragon fruit plants have root knots, the main root has only a small number of 1-2 root knots, the plants can also grow normally, but the fleshy stems of the fruiting plants are shrunken, the dragon fruit plants at the initial stage infected with the root-knot nematodes are selected to carry out root application by using medicaments for the dragon fruit plots with the conditions, and soil within the range of 20cm of the main root and the main root is drenched; the preparation is 500 ml/mu of microcapsule emulsion of 30% fosthiazate, 20ppm of 90% sodium naphthalene acetate, 10ppm of indoleacetic acid and 1000-time solution of 30% metalaxyl-hymexazol suspending agent, the preparation is uniformly mixed with water, and the water consumption per mu is 1 t;
(3) late-stage prevention and control of dragon fruit root-knot nematode
When the root knot of the root-knot nematode is fully distributed on the main root of the dragon fruit and almost no fibrous root exists, the root cutting method is adopted for preventing and treating;
a) cutting roots, namely cutting pulp and stems of the dragon fruits at a position 10cm above the ground, removing the cut roots and root knots of underground parts, and cutting flowers and fruits of the dragon fruits together under the condition that the plants do not recover tree vigor;
b) protecting new roots, namely placing a root protection bag at the root cutting position of the dragon fruit, and filling a soilless substrate into the root protection bag; leading the new root of the dragon fruit to grow in the root protecting bag; when the plants return to green and the root systems reach the soil layer 30-45 days later, the biological agent is applied for 1 time, and the fruits can be left; usually, the fruit can be remained after 1-2 months of root cutting; 1-2 fruits are remained in the first batch of fruits after root cutting, and the fruits can be normally remained after the second batch of fruits.
2. The integrated control method of pitaya root knot nematodes according to claim 1, wherein: in the prevention process of the newly planted pitaya land blocks, the dosage of the fosthiazate granules is 1.5kg per mu, and the dosage of the organic fertilizer is 2 tons per mu.
3. The integrated control method of pitaya root knot nematodes according to claim 1 or 2, wherein: the biological agent is a mixed solution of paecilomyces lilacinus, bacillus subtilis and biogas slurry.
4. The integrated control method of pitaya root knot nematodes according to claim 3, wherein: the mass ratio of the paecilomyces lilacinus to the bacillus subtilis to the biogas slurry is 1:1:1000-1500, and the paecilomyces lilacinus, the bacillus subtilis and the biogas slurry are uniformly mixed and then sprayed.
5. The integrated control method of pitaya root-knot nematodes according to claim 1, characterized by comprising the following steps: the nutrient solution is a solution formed by mixing biogas slurry and peanut bran, and the mass ratio of peanut bran water to biogas slurry is 1: 100-150.
6. The integrated control method of pitaya root knot nematodes according to claim 1, wherein: the width of the trenching row is 5-8cm, the depth is 20cm, and the length is matched with the dragon fruit planting row.
7. The integrated control method of pitaya root knot nematodes according to claim 1, wherein: the medicament for the primary prevention and treatment of the dragon fruit root-knot nematode is used for 1 time every 15-20 days and is continuously used for 2 times.
8. The integrated control method of pitaya root knot nematodes according to claim 1, wherein: the formula of the soilless substrate is coconut husk: organic fertilizer: the mass ratio of vermiculite is 44: 5: 1.
9. the integrated control method of pitaya root knot nematodes according to claim 1, wherein: the root protection bag is formed by splicing a single plastic shell plate (1), a plurality of air holes (2) are formed in the plastic shell plate (1), and a left upper oblique opening (3) and a left side socket (4) connected with the left upper oblique opening are formed in the left side; the right side is provided with a right lower bevel opening (6) and a right socket (5) connected with the right lower bevel opening; in the installation process, the left side socket (4) is connected with the right side socket (5) in a matching way in a clamping way to form a root protection bag.
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