CN112369274A - Application method of pre-emergence herbicide for peppers - Google Patents
Application method of pre-emergence herbicide for peppers Download PDFInfo
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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
- A01G17/00—Cultivation of hops, vines, fruit trees, or like trees
- A01G17/005—Cultivation methods
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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
- A01G13/00—Protecting plants
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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
- A01G7/00—Botany in general
- A01G7/06—Treatment of growing trees or plants, e.g. for preventing decay of wood, for tingeing flowers or wood, for prolonging the life of plants
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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
- A01N33/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic nitrogen compounds
- A01N33/16—Biocides, pest repellants or attractants, or plant growth regulators containing organic nitrogen compounds containing nitrogen-to-oxygen bonds
- A01N33/18—Nitro compounds
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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
- A01N57/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic phosphorus compounds
- A01N57/18—Biocides, pest repellants or attractants, or plant growth regulators containing organic phosphorus compounds having phosphorus-to-carbon bonds
- A01N57/20—Biocides, pest repellants or attractants, or plant growth regulators containing organic phosphorus compounds having phosphorus-to-carbon bonds containing acyclic or cycloaliphatic radicals
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention discloses a method for using a pre-emergence herbicide for peppers, and belongs to the technical field of application of forest seedling herbicides. The invention discloses a method for using a pre-emergence herbicide for pepper, which comprises the steps of selecting pepper varieties and seeds, and sowing in spring or late autumn; spraying herbicide within 3 days after the seedlings of the pepper come out of the ground; the combination of the closed herbicide and the extirpatable herbicide is selected, and when perennial weeds in the nursery land are more (more than or equal to 2 plants/m)2) Whether or not annual weeds are presentSelecting glyphosate and pendimethalin for compounding; when the land is planted in the nursery, the perennial weeds are less (less than or equal to 1 plant/m)2) And annual weeds are more (more than or equal to 2 plants/m)2) When in use, glufosinate-ammonium and pendimethalin are selected and compounded. The invention can greatly reduce the labor of pepper nursery, and the production cost can be reduced by more than 85%.
Description
Technical Field
The invention relates to the technical field of application of forest seedling herbicides, in particular to a method for using a pre-emergence herbicide for peppers.
Background
The pepper is an important flavoring tree species in China, has great edible value and medicinal value, becomes one of the most rapidly developed economic forest tree species in China at present, and is also a tree species with higher economic value at present. The nursery stock breeding scale is getting bigger and bigger, but the nursery stock weeding is the headmost work of people all the time, which not only consumes time and labor and has low efficiency, but also damages and damages seedlings when the seedlings are artificially weeded. In order to find a time-saving and labor-saving weeding method, herbicide application research is carried out.
However, the selection of the herbicide must be careful, otherwise, the death or injury of the seedlings can be caused, the seedling raising effect is affected, and even the seedling raising work fails.
Therefore, the problem to be solved by the technical personnel in the field is to provide a method for using the pre-emergence herbicide of the pepper.
Disclosure of Invention
In view of the above, the invention provides a method for using a pre-emergence herbicide for peppers, which can greatly reduce the labor for pepper nursery gardens, improve the working efficiency, but does not damage pepper seedlings, and minimize the influence on the emergence of the peppers.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for using a pre-emergence herbicide for peppers comprises the following specific steps:
(1) chinese prickly ash seed
Selecting a proper variety of zanthoxylum bungeanum and zanthoxylum bungeanum seeds dried in the shade according to a planting target, sowing in spring or late autumn, sowing in a broadcasting way or in drilling way, wherein the sowing depth is 1-1.5 cm, covering with a film or covering with grass after sowing to preserve soil moisture, and germinating in spring in the next year;
(2) critical period of herbicide spraying
After the soil is unfrozen in spring, when the highest temperature in the daytime reaches 25 ℃ and the lowest temperature at night reaches more than 10 ℃, the seedling emergence condition needs to be closely observed, and the soil is thawed once in the morning and at night each day; spraying herbicide within 3 days after the seedlings of the pepper come out of the ground;
the emergence time of the pepper is long, the herbicide cannot be sprayed immediately after sowing, and the pepper seedlings are sprayed within 3 days after the emergence of the soil. The effect is poor in early and late stages, and if the herbicide is sprayed early before emergence of seedlings, the herbicide can fail prematurely; if sprayed after more emergence, the emerged seedlings are killed by biocidal herbicides.
(3) Selection and proportion of herbicide
The closed herbicide and the extinguishment herbicide are used in a matching way. The closed herbicide is pendimethalin, and the biocidal herbicide is glufosinate-ammonium or glyphosate. Selecting glufosinate-ammonium or glyphosate according to the grass type. When perennial weeds such as dianella ensifolia, field bindweed, ixeris sonchifolia hance, Japanese metaplexis and Japanese aralia herb are more than or equal to 2 plants/m in the nursery2) The glyphosate and pendimethalin are selected to be compounded no matter whether annual weeds exist, and the spraying concentration is 100 times of pendimethalin and 50-75 times of glyphosate; when no perennial weeds exist in the nursery land or the perennial weeds are less (less than or equal to 1 plant/m)2) The annual weeds such as purslane, chenopodium album, amaranthus retroflexus, crab grass, eleusine indica, teff and the like are more than or equal to 2 plants/m2) In the method, glufosinate-ammonium and pendimethalin are selected to be compounded, and 100 times of pendimethalin and 75-100 times of glufosinate-ammonium are sprayed; 300ml of pendimethalin per mu, 400-600 ml of glyphosate per mu and 300-400 ml of glufosinate per mu;
(4) herbicide application method
When the herbicide is sprayed, the ground is required to be kept moist, and the spraying is uniform and complete; if the glyphosate or glufosinate-ammonium meets rain within 6 hours after spraying, pendimethalin and trifluralin are not affected and do not need to be sprayed again, but the glyphosate or glufosinate-ammonium needs to be sprayed again;
(5) management of seedling stage
After the ground is closed, the Chinese prickly ash seedlings start to emerge in succession, the ground is ensured not to be dry, timely water supplement is paid attention, and the complete emergence of seedlings is ensured; pendimethalin has poor sealing effect on weeds such as cocklebur, morning glory and nutgrass flatsedge, and needs to be pulled out manually when just coming out of the earth.
According to the technical scheme, compared with the prior art, the application method of the pre-emergence herbicide for the peppers is provided, the herbicide is sprayed within 3 days after the pepper seedlings begin to emerge, the closed herbicide and the biocidal herbicide are selected to be matched for use, the closed herbicide is pendimethalin, and the biocidal herbicide is glufosinate or glyphosate. After the herbicide is sprayed, pepper seedlings start to emerge in succession, and the soil is required to be kept moist before full seedlings emerge. The weed control effect and fresh weight control effect can reach more than 80 percent after 40 days of pesticide application. After 4 months of medicine application, the average height of the pepper can reach 90 percent of that of the control group; the emergence rate of the pendimethalin and glyphosate compound herbicide is about 60-75% of that of a control group, and the emergence rate of the pendimethalin and glyphosate compound herbicide is about 50-54% of that of the control group, so that the production requirements can be met. Pendimethalin has poor sealing effect on cocklebur, morning glory and other weeds, and needs to be pulled out manually. The invention can greatly reduce the labor of pepper nursery, and the production cost can be reduced by more than 85%.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
EXAMPLE 1 trifluralin spray
Directly spraying trifluralin to the pepper nursery land where the weed seedlings just come out after spring sowing, and sealing the ground. 150ml of trifluralin emulsifiable concentrate with 48 percent of active ingredient is added into each barrel (about 15L of water), and the mixture is uniformly sprayed on the ground, wherein the area is about 0.5 mu, and the dosage per mu is about 300 ml. The results of the investigation are shown in Table 1.
TABLE 1 trifluralin control of weeds and fresh weight control (%)
As can be seen from the table 1, the trifluralin has obvious effects on the common weeds in farmlands such as portulaca oleracea, portulaca oleracea and amaranthus retroflexus in plant control effect and fresh weight control effect, the control effect on the amaranthus retroflexus and the portulaca oleracea 20 days after the application reaches 100%, and the control effect on the portulaca oleracea is more than 90%. The control effect of trifluralin on the eleusine indica is 88.24% 20 days after the herbicide is applied, but the fresh weight control effect is 100%, which shows that the herbicide can form certain damage and inhibition effect on the existing weeds, but the large weeds can quickly recover to grow after being inhibited for a period of time. The control effect of trifluralin on wormwood and ixeris sonchifolia is not as obvious as that of other weeds, and the control effect is less than 50% after 40 days of application.
Meanwhile, the influence of trifluralin on the emergence of pepper seedlings and the growth of seedlings on a closed ground is investigated, and the results are shown in table 2.
TABLE 2 amount of emergence and growth of zanthoxylum bungeanum after trifluralin treatment
As can be seen from the data in the table 2, the trifluralin has obvious inhibition phenomenon on the emergence amount and the growth amount of pepper seedlings, and roots are generally thin 40 days after the trifluralin is applied, leaves are shrunk and yellow, and the phenomena of deficiency of elements are similar; the influence on the subsequent growth of the pepper is serious, and the average height of 4 months after the application of the medicine is only 62.4 percent of that of a control group (the ground is not sealed by the medicine, the pepper grows normally, the same below).
Example 2 spraying pendimethalin
For the pepper seed planting field just emerged from the weed seedling, pendimethalin is directly sprayed to seal the ground, 150ml of pendimethalin missible oil with 33 percent of effective component is added into each barrel (about 15L), the spraying area is 0.5 mu, the dosage per mu is about 300ml, the pepper seed planting field not only can seal the ground, but also has a certain inhibiting effect on the just emerged weed seedling. Pendimethalin has remarkable control effect on broadleaf weed Amaranthus retroflexus, Gray vegetable and purslane, the grass grows very fast in summer in the north, and timely spraying of herbicide can reduce labor and management cost, effectively inhibit growth of the grass and enable soil nutrients to flow to nursery stocks more.
Table 3 pendimethalin against weed control and fresh weight control (%)
As can be seen from Table 3, the control effect of pendimethalin is about 40-60 days, the control effect on purslane, redroot amaranth and chenopodium album is obvious 40 days after the pesticide is applied, and the control effects on fresh weight of purslane, redroot amaranth and chenopodium album are 97.34%, 88.76% and 93.2% respectively; has obvious inhibiting effect on gramineous weed eleusine, and reaches 100 percent. Pendimethalin is almost ineffective to perennial weeds of ixeris sonchifolia, Convolvulus arvensis and dianella, has almost no sealing effect on large-grain seeds of morning glories, can germinate most of the seeds, but has a certain inhibition effect on the growth of seedlings, and shows that the fresh weight control effect is higher than the plant control effect. If the control effect on morning glory plants and the fresh weight control effect are obviously reduced by 40 days after the pesticide is applied, the control effect is only 5.35 percent and 6.86 percent. Therefore, pendimethalin has little control effect on perennial weeds, morning glory, cocklebur and other large-particle seeds, can not be used alone, and must be matched with a biocidal herbicide for use.
Meanwhile, the influence of pendimethalin on the emergence amount and the growth amount of the peppers on the closed ground is investigated, and the investigation result is shown in table 4.
TABLE 4 emergence and growth of Zanthoxylum bungeanum after pendimethalin treatment
As shown in Table 4, the amount of emergence and the amount of growth of the peppers are both influenced to a certain extent after the pendimethalin is used for sealing the ground, the amount of emergence is 66.85% of the control, and the amount of growth at 120 days is 80.54% of the control. But has little influence on the nursery stock from the production aspect.
The table 1, 2, 3 and 4 are combined to see that pendimethalin has better inhibition effect on emerged weeds than trifluralin, mainly inhibits the growth of growing points, has small influence on pepper seedlings, has no obvious difference between the emergence amount and the growth amount of pepper 40 days after spraying and a control group, has small influence on the average growth amount of pepper after 4 months after application of a pesticide, and has an average height of about 80 percent of that of the control group.
Example 3 spraying pendimethalin + Glyphosate
The compound herbicide weed control test is carried out on pepper seed fields where existing weeds are unearthed but only a small amount of seedlings are unearthed. 150ml of pendimethalin missible oil with 33 percent of active ingredients and 200ml of glyphosate isopropylamine with 41 percent of active ingredients are added into each barrel (about 15L of water), and the mixture is uniformly sprayed on the ground with the area of about 0.5 mu. The types and amounts of weeds were examined before spraying, and the weed control effect was examined 20 days and 40 days after spraying, and the results are shown in Table 5.
TABLE 5 combination of pendimethalin and Glyphosate against weeds and fresh weight (%)
The glyphosate belongs to an organic phosphorus systemic conduction type biocidal herbicide, has a strong biocidal effect on emerged weeds and seedlings, pendimethalin can inhibit unearthed weeds from sprouting, weeds still can not emerge within 40-60 days after spraying, and the weed control advantage is obvious. 40 days after the pesticide is applied, the control effect on annual weeds such as goosegrass, amaranthus retroflexus and teff reaches 100 percent, and the control effect on perennial weeds such as dianella, ixeris sonchifolia and Convolvulus arvensis also over 86 percent and can reach 100 percent at most. The combined action effect of the compound herbicide has obvious advantages. In conclusion, the control effect of various weeds in 40 days is higher than 80%, and the effect is obvious.
Meanwhile, the influence of pendimethalin and glyphosate on the emergence amount and the growth amount of the peppers after the compound treatment is investigated, and the investigation result is shown in table 6.
TABLE 6 emergence and growth of Zanthoxylum bungeanum after pendimethalin and glyphosate complex treatment
The pendimethalin and glyphosate are compounded to have good control effect on various weeds, particularly perennial weeds, all of the dianthus chinensis, the ixeris sonchifolia hance and the bindweed are almost completely eradicated, and the growth potential of the roots is obviously inhibited even if the roots are not completely killed. The method has certain influence on the emergence amount of the pepper, the emergence amount is 54.11 percent of the contrast, but the method has no influence on production and is beneficial to the contrary, so that the thinning workload can be reduced. The treatment has obvious inhibiting effect on the early-stage unearthed seedlings, and the height of the seedlings at 40 days is only 40.22 percent of that of the control. But in the later growth period, the inhibition effect on the growth of the nursery stock is obviously reduced, and the growth is gradually recovered. The average growth amount after 4 months of application is 86.92% of that of the control group, and the production requirement can be completely met.
Example 4 spraying pendimethalin + glufosinate-ammonium
When weeds are already emerged and only a very small amount of pepper seedlings begin to emerge, 150ml of pendimethalin missible oil with 33 percent of active ingredients and 175ml of glufosinate-ammonium aqua with 20 percent of active ingredients are mixed in each barrel (about 15L of water) of a sprayer, and the mixture is uniformly sprayed on the ground with the area of about 0.5 mu. The weed species and the weed amount were investigated before spraying, and the control effect was investigated 20 days and 40 days after application.
TABLE 7 combination of pendimethalin and glufosinate-ammonium for weed control and fresh weight control (%)
As can be seen from the table 7, the combined action effect of pendimethalin and glufosinate-ammonium on weeds is obvious, almost no weeds can be seen in the field after 20 days of herbicide spraying, perennial weeds such as dianella, field bindweed, ixeris sonchifolia and the like start to recover and grow after 40 days of herbicide spraying, and tender shoots grow gradually, which indicates that the treatment has short effective time on perennial weeds and cannot radically and completely remove the perennial weeds. Land plots with perennial weeds are unsuitable for compounding glufosinate-ammonium with pendimethalin.
The effect of pendimethalin and glufosinate-ammonium on the seed emergence and seedling growth of the pepper is compounded, and the investigation result is shown in table 8.
TABLE 8 amount of emergence and growth of Zanthoxylum bungeanum after pendimethalin and glufosinate-ammonium compounding treatment
It can be seen that the amount of emergence of pepper seedlings per square meter is 258.47 plants per unit area, which is 54.00% of the control, the average growth of pepper seedlings after 40d of pesticide application is 2.69cm, which is different from the control group, but the subsequent inhibition dissipates faster, the average growth of pepper seedlings after 4 months of pesticide application is only 8cm lower than that of the control group, and the treatment is affected the least in the herbicide treatment of pepper seedlings. The compound herbicide has the best application effect on the plots without perennial weeds before emergence of the pepper seedlings, but is not applicable to the plots with the perennial weeds.
Example 5 spraying trifluralin + glufosinate-ammonium
When weeds are already emerged and only a very small amount of seedlings of pepper begin to emerge, the trifluralin and glufosinate-ammonium compound herbicide is sprayed for testing. 150ml of trifluralin emulsifiable solution with the content of the active ingredient of 48 percent and 175ml of glufosinate solution with the active ingredient of 20 percent are added into each barrel (about 15L), and the mixture is uniformly sprayed on the ground, and the area is about 0.5 mu. The compounded combination of the trifluralin and the glufosinate-ammonium has good control effect on broad-leaf weeds and gramineous weeds, and the investigation result is shown in table 9.
TABLE 9 trifluralin compounded with glufosinate-ammonium control of weed plants and fresh weight (%)
The compound herbicide has particularly obvious effect of protecting various weeds 20 days after being sprayed, and has the lowest control effect on the field bindweed and the ixeris sonchifolia, namely 83.3 percent and 86.67 percent; 40 days after the pesticide is applied, the control effect on annual weeds such as purslane, amaranthus retroflexus, teff and piemarker is remarkable, the plant control effect and fresh weight control effect are both higher than 83%, but the control effect on perennial weeds such as field bindweed, Chinese siphonostegia herb and veronica denticulata is obviously reduced, the control effect of the veronica denticulata is the highest and is only 68.8%, and the effect is basically lost. Therefore, this treatment is not suitable for plots with many annual weeds.
The effects of trifluralin and glufosinate-ammonium on pepper seed emergence and seedling growth are compounded, and the investigation results are shown in table 10.
TABLE 10 amount of emergence and growth of Zanthoxylum bungeanum after trifluralin and glufosinate-ammonium compounding treatment
The compound herbicide has large influence on the emergence rate and the growth amount of the peppers, the number of seedlings of each square popped pepper is 236.94, the emergence rate is 49.50 percent of the contrast, the average growth amount of the seedlings after being applied for 40 days is 2.25cm which is 49.45 percent of the contrast, the average growth amount after being applied for 120 days is 64.66cm, and the growth amount is only 71.63 percent of the contrast, which shows that the compound herbicide has stronger effects on the emergence and growth inhibition of the seedlings of the peppers and has a poorer effect than the compound herbicide of pendimethalin and glufosinate ammonium.
Example 6 trifluralin + Glyphosate spray
When more annual weeds are produced, trifluralin and glyphosate are selected to be compounded, 150ml of trifluralin missible oil with the content of 48 percent of effective components and 200ml of glyphosate isopropylamine salt with the content of 41 percent of the effective components are mixed in each barrel (about 15L), and the mixture is uniformly sprayed on the ground with the area of about 0.5 mu. The species and the number of weeds were examined before spraying, and the weed control effect was examined 20 days and 40 days after spraying. The results are shown in Table 11.
TABLE 11 trifluralin and glyphosate combinations against weeds and fresh weight (%)
Compared with the combination of trifluralin and glufosinate, the compound combination of trifluralin and glyphosate has close control effect on annual weeds, the control effect on annual weed plants and the fresh weight control effect are both more than 87% after the combination is applied for 40 days, but the compound combination of trifluralin and glyphosate has far better control effect on perennial weeds than the compound combination of trifluralin and glufosinate, the control effect on perennial weeds such as siphonostegia, field bindweed, wormwood, ixeris sonchifolia hance and the like is more than 86.5%, the control effect on veronica denticulata is the best, and the control effect is 100%.
The effects of trifluralin and glyphosate on pepper seed emergence and seedling growth are compounded, and the investigation results are shown in table 12.
TABLE 12 emergence and growth of Zanthoxylum bungeanum after trifluralin and glyphosate complex treatment
The control effect of the compound herbicide on weeds is higher than that of other treatments, the emergence rate of the herbicide combined pepper in unit area is 288 strains, the emergence rate is 60.17%, and the growth amount of seedlings is not high after 40 days of application and is only 2 cm; the subsequent inhibition effect is also continuous all the time, and the 120-balance average growth amount after the pesticide is applied is 77.99cm, which shows that the compound combination has obvious condition of limiting the growth of nursery stocks and has poorer comprehensive effect than the combination of pendimethalin and glyphosate.
In conclusion, the herbicide with reasonable concentration is sprayed before emergence of seedlings after pepper seeding, so that weed emergence and growth can be effectively prevented, certain influence is exerted on emergence of seedlings and growth of seedlings of peppers, and the influence effect is limited. And (4) selectively spraying different formulations of herbicides according to different conditions. For pepper seedling growing lands without weeds or with weeds just emerging, the effect of spraying 100 times of pendimethalin is better than that of spraying trifluralin, and the influence on pepper seedlings is small. For the existing pepper seedling culture land with weeds coming out of earth, when annual weeds are mostly in the field, the weed control effect is best by a compound mode of spraying 100 times of pendimethalin and 75-100 times of glufosinate-ammonium, and the influence on the emergence amount and the growth amount of pepper seedlings is small; when most of perennial weeds are generated, a compound mode of spraying 100 times of pendimethalin and 50-75 times of glyphosate is selected to have good weed control effect, and the influence on seedling emergence and growth of pepper seeds is small.
In the aspect of labor application, the sprayed compound herbicide can effectively seal the ground for about 40-60 days, weeds in a control group nursery field without the sprayed herbicide freely grow in the period, and artificial weeding is needed for 3-4 times in 60 days. According to actual measurement, the average labor consumption per mu of land of the control group needs at least 28 people, the average labor consumption per mu of land of the herbicide spraying group is less than 4 people, and the cost can be saved by at least 85% when the herbicide is sprayed. Therefore, the cost can be greatly saved by spraying the herbicide with proper concentration, and the effect of achieving twice the result with half the effort is achieved.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (1)
1. A method for using a pre-emergence herbicide for peppers is characterized by comprising the following specific steps:
(1) chinese prickly ash seed
Selecting pepper varieties and seeds, sowing in spring or late autumn, sowing in a broadcast manner or in a drill manner, wherein the sowing depth is 1-1.5 cm, covering films or covering grass after sowing to preserve soil moisture, and germinating in spring of the second year;
(2) critical period of herbicide spraying
After the soil is unfrozen in spring, when the highest temperature in the daytime reaches 25 ℃ and the lowest temperature at night reaches more than 10 ℃, the seedling emergence condition needs to be closely observed, and the soil is thawed once in the morning and at night each day; spraying herbicide within 3 days after the seedlings of the pepper come out of the ground;
(3) selection and proportion of herbicide
The perennial weeds in the nursery land are more than or equal to 2 plants/m2In the course of weeding, the glyphosate and pendimethalin are selected and compounded, and the spraying concentration is that the glyphosate and pendimethalin are sprayed100 times of pendimethalin and 50-75 times of glyphosate; when the land is in nursery, the perennial weeds are less than or equal to 1 plant/m2And annual weed is more than or equal to 2 plants/m2In the method, glufosinate-ammonium and pendimethalin are selected to be compounded, and 100 times of pendimethalin and 75-100 times of glufosinate-ammonium are sprayed; 300ml of pendimethalin per mu, 400-600 ml of glyphosate per mu and 300-400 ml of glufosinate per mu.
(4) Herbicide application method
When the herbicide is sprayed, the ground is required to be kept moist, and the spraying is uniform and complete; if the glyphosate or glufosinate-ammonium meets rain within 6 hours after spraying, pendimethalin and trifluralin are not affected and do not need to be sprayed again, but the glyphosate or glufosinate-ammonium needs to be sprayed again;
(5) management of seedling stage
After the ground is closed, the Chinese prickly ash seedlings start to emerge in succession, the ground is ensured not to be dry, timely water supplement is paid attention, and the complete emergence of seedlings is ensured; pendimethalin has poor sealing effect on weeds such as xanthium sibiricum, morning glory and sedge, and needs to be manually pulled out when just coming out of the earth.
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