As the temperature gradually increases, the weeds in the field become increasingly luxuriant, and the critical period of weeding in the field is also the peak stage of herbicide use.
However, farmers always say that herbicides can't kill grass, and phytotoxicity can occur. In fact, herbicides can be classified according to different medicinal properties, and the use points of different classifications vary widely. The following 39 herbicide tips are used to help you!
Acetochlor
A variety of annual grass weeds and some broadleaf weeds are ineffective against perennial weeds.
Use crops: soybeans, peanuts, corn, cotton, canola, rice, potatoes, etc.
Note: Master the application of weeds before emergence; with the improvement of soil moisture, the activity of the drug is enhanced; use in sandy soil with low organic matter content, low dose; rice can not be used; cucumber, watermelon, melon, spinach , amaranth, millet, sorghum sensitive to acetochlor, with caution or less use.
2, metolachlor
It has outstanding effects on annual grass weeds such as crabgrass, ginseng grass, goosegrass, valerian, foxtail, wild oats, hard grass, maiden, and bluegrass; for Lecco, Solanum nigrum, Cuscuta, and Big Nest Broadleaf weeds have obvious effects. It also has good control effect on the weeds, leeks, and burdocks.
Use crops: rice, soybeans, sugar cane, peanuts, corn
Note: The soil moisture has a good effect of controlling the weeds, and some weeds such as purslane, iron leeks, bristle, duck toe, and wattle are ineffective, and are ineffective for perennial weeds.
3. Atrazine
It can control annual grass weeds and broadleaf weeds, and the control effect on broadleaf weeds is better than grass weeds, on 蓼, 黎, 马, è‹‹, 马å”, å°¾è‰, 牛è‰, see Mai Niang, etc., also has a certain inhibitory effect on perennial weeds.
Use crops: corn, sorghum, orchard, sugar cane, soybeans, peanuts, cotton, rubber plantations, millet, wheat, rice, tea gardens, etc.
Note: When the soil moisture is good, the herbicidal effect is good. For the soil with poor moisture, the amount of water applied is increased. The peach tree is sensitive to atrazine and should not be used in Taoyuan.
4, annihilation
It can prevent annual grass weeds and broadleaf weeds, and has stronger killing power against dicotyledonous weeds than monocotyledonous weeds. It also has certain lethality to perennial weeds and poor effect on perennial deep-rooted weeds.
Use crops: sugar cane
Note: When the soil moisture is good, the herbicidal effect is good, and the weeds in the sugarcane field are controlled. The spray treatment of stems and leaves should be mastered in the weed 3-4 leaf stage.
5, bensulfuron-methyl
It can prevent annual and perennial broadleaf weeds and sedge weeds. Such as ragweed, kohlrabi, squash, groceries, beef felt, heterosex sedge, water sedge, squid, stalk sedge, sown wormwood, leeks, piglets and so on. It has an inhibitory effect on dwarf sage and sedge, and has poor control effect on grass weeds.
Use crops: wheat, rice, wheat, Honda and live fields
Note: The agent has little mobility in the soil, and temperature and soil have little effect on it. Extending the water retention time when used in paddy fields is the key to improving the weeding effect. Experiments show that water retention is 5-7 days, not less than 3 days.
6, nicosulfuron
It can prevent annual and perennial grass weeds and some broadleaf weeds. The weeds that are sensitive to the drug are valerian, foxtail, wild oats, and twigs, and the moderately sensitive weeds are
Use crops: corn
Note: The corn leaves have mild chlorotic macula after application, but they will return to normal soon. Corn is sensitive to the 2nd leaf stage and above the 5th leaf stage, and is susceptible to phytotoxicity. The corn varieties sensitive to this drug are sweet corn and popcorn. The corn treated with organic phosphorus is sensitive to this drug.
When the temperature is applied at 20 °C, the air humidity is 60%, and no rain during 12 hours is beneficial to the effect of the drug.
7, flufenacetate
It can control broadleaf weeds, such as ramie, willow locust, iron leeks, amaranth, ragweed, Bidens, Cyclobalanopsis, Amaranth, Li, lobed, morning glory, coiled locust, purslane , Solanum nigrum, Chicory, Xanthium. It is basically ineffective for Xiaoyan and Jingjing, and it is generally effective against wolves and grasses.
Use crops: soybeans, peanuts, mung beans
Note: The drug has a long residual period in the soil and is not passivated in the soil. The effect on the sputum is not too great under normal use.
However, the amount of the drug is too large, which is harmful to the Chinese cabbage, sorghum, corn, wheat, millet, sugar beet, and flax.
8. Ethyl flufenacetate
Control a variety of annual broadleaf weeds. It has obvious control effect on purslane, scorpion, anti-twig, green peony and longan, and has certain control effect on ramie, piglet, mother-in-law, leeks and sorghum. However, it is generally effective against 蓼, 黎, and duck toe.
Use crops: soybeans, peanuts, wheat
Note: The application should be strictly controlled, and sprayed evenly. It should be applied on sunny days. There should be no rain for 4 hours after application. The drug is susceptible to phytotoxicity to soybeans and is first tested and then promoted. Dark brown spots were produced on the leaves and petioles of soybean cotton which were directly contacted with the drug for two days, and had no adverse effects on the late stage of soybean peanut.
9, diuron
It can prevent most annual and perennial weeds, such as crabgrass, goosegrass, foxtail, marmot, li, sorghum, scorpion, purslane, sedge and so on. Can also be used in rice fields to prevent eye vegetables, four leaves, cows, etc.
Use crops: cotton, sugar cane, soybeans, peanuts, corn, cucumber, rice
Note: The wheat field is banned and has a strong contact effect on cotton leaves. The application must be applied to the soil surface. It is not suitable for application after the cotton seedlings are unearthed. The amount of sand land is less than that of clay, and sand leakage fields are not suitable for application.
10, sulforaphane
Can control a variety of annual weeds, such as horses, see Mai Niang, broken rice bran, alfalfa, wild donkey, donkey, donkey, etc.
Use crops: sugar cane
Note: When the temperature is low, it is not conducive to the penetration and conduction of sulforaphane. Therefore, it should be applied on sunny days and when the temperature is high. Fields with more broadleaf should be mixed with other herbicides.
11, 2-4D butyl ester
Special effects on the control of scented wormwood, leeks, glutinous rice and lacquer. It can prevent cockroaches, cockroaches, ruminants, iron leeks, purslane, wattle, bitter cauliflower, cockroach, cocklebur, ramie, turf, wild sage, duck toe, etc.
Use crops: wheat, corn, sorghum, millet, rice
Note: The control of weeds in wheat field is suitable for two stages: wheat differentiation growth cone elongation and floret differentiation stage to stamen and stamen differentiation; environmental conditions have a great influence on the herbicidal effect and safety of the drug, generally in high temperature and strong air. When the soil moisture is high, it is not easy to produce the key, and it can exert its effects. The drug is highly volatile and the application field must be at a distance from the sensitive field.
12, sodium dimethyltetrachloride
Can control a variety of broadleaf weeds
Use crops: wheat, corn, rice
Note: When spraying, you should choose windless weather, not too close to sensitive crops, and low temperature weather will affect the efficacy of the drug and cause it to be harmful. 12 hours after application, it should be sprayed once in case of rain.
13. Pyridoxine
It can prevent annual and perennial grass weeds, such as Mai Niang, foxtail, alfalfa, crabgrass, goosegrass, wild oats, reeds, bermudagrass, marmots, etc., which are ineffective against dicotyledonous weeds.
Use crops: rapeseed, soybeans, beets, cotton, peanuts
Note: Gramineous weeds have the best herbicidal effect in the 3-5 leaf stage. When the application is applied, the agent is prevented from drifting to the grass crops. When the humidity of the air is high, the effect is beneficial.
14. College flupirtine
It can prevent annual and perennial grass weeds, such as crabgrass, foxtail, marmot, etc., and is ineffective against broadleaf weeds and sedge weeds.
Use crops: soybeans, kale, peanuts, cotton, rape
Note: This medicine can be quickly absorbed by weeds. Generally, the rain does not affect the weeding effect after 3-5 hours of application. Generally, weeds have a large amount of dry weather, excessive weeds, or appropriate control of perennial grass weeds.
15, fine quizalofop
Broadleaf control of annual grass weeds, such as valerian, goosegrass, foxtail, maiden, wild oats, buckwheat, crabgrass, teff and so on. Increasing the amount of the drug can prevent perennial grass weeds such as Bermudagrass, G. chinensis, and reed. Ineffective for broadleaf weeds and sedge weeds.
Use crops: soybean, cotton, sesame, rape, peanut, cabbage, watermelon
Note: Rainfall after 2 hours of spraying has little effect on the efficacy of the drug. It is not necessary to make up the spray. In the case of dry weather, the crop leaves may have phytotoxicity, but it will not affect the yield.
16, oxazolamide
It can prevent annual and perennial grass weeds. Invalid for broadleaf weeds
Use crops: soybeans, cotton, peanuts, cabbage, wheat (safety added)
Note: Cannot be used for barley; oats, corn, sorghum weeding. After sowing and emergence of wheat, it is best to apply the herbaceous weeds from the leaves to the tillering stage. The long-term drought will reduce the efficacy. The safeners in the preparations cannot be used in wheat fields; some wheat varieties may have shallower leaf color after application, and recover from 7-10 days. Rainfall does not affect the efficacy after 5 hours of application.
17. Paraquat
Can effectively prevent weeds in one or two years. It has a controlling effect on the part of perennial weeds, but it can not kill its underground rhizomes. It has poor effects on plantain, alfalfa, foxglove, thatch and toed grass.
Use crops: non-cultivated land, orchard, corn, sugar cane, etc.
Note: In order to improve the control effect on weeds, it is best to choose the time when the weeds are all germinated and the grass age is below 3 hearts. Light can accelerate the effect of the drug, and the rain can basically guarantee the efficacy after 2 hours of application.
18, trifluralin
It can prevent annual monocotyledon weeds and annual broadleaf weeds. Such as: horse Tang, beef tendon grass, dogtail grass, wild donkey, purslane, scorpion, scorpion and so on. It is basically ineffective for perennial weeds.
Use crops: pre-emergence herbicides for dry and horticultural crops, cotton, soybeans, peanuts, watermelon, canola
Note: Fluorine should be mixed with 3-5cm in time after spraying and photolysis. It should not be too deep. The residual effect period of trifluralin is longer, and the arid area in the north can last for 10-12 months, which has certain influence on the sorghum sorghum and millet.
19. Glyphosate
It can prevent perennial weeds from living in almost all of the year. It has outstanding effects on weeds such as common crabgrass, iron leeks, anti-branches, and sedge.
Use crops: non-cultivated land, orchard, corn, sugar cane, etc.
Note: Glyphosate is a herbicide herbicide. Avoid spraying contaminated crops during application to avoid phytotoxicity. Contact with soil immediately passivation loss of activity is only suitable for stem and leaf treatment. The sediment in the water can adsorb the medicament, so it is not possible to use a turbid river water or a harder water to dispense the pharmaceutical liquid.
For perennial malignant weeds, such as white stalks and fragrant aconite, the drug can be administered once a month after the first administration to achieve the desired control effect. In the sunny day, high temperature, the effect of the drug is good, and it should be sprayed in the rain within 4-6 hours after spraying.
20, imidazolium nicotinic acid
It can control annual and perennial grasses weeds and sedges, some broadleaf weeds.
Use crops: soybeans
Note: More than 6.7 grams of active ingredient per acre has an inhibitory effect on soybean growth, but it can be quickly restored. It is not suitable for planting rapeseed, sorghum, rice, eggplant, strawberry and other sensitive effects, and can grow barley, wheat and legume crops.
21. Usorphanone
Annual and perennial grass weeds, as well as authigenic cereal crops in many broadleaf crop fields.
Use crops: a variety of broadleaf crops such as soybeans, canola, and cotton
Note: In the case of drought and low temperature, the herbicidal effect is low. The dosage should be increased. When the weeds are large and dense, the dosage should be increased.
22, chlorpyrifos
Broadleaf control of a variety of annual dicotyledon weeds and sedge weeds, such as: Xanthium, ramie, scorpion, duck toe grass, scorpion, water sedge, dwarf sage, etc. can only kill the aboveground part of perennial weeds , invalid for grass weeds
Use crops: rice, wheat, peanuts, soybeans, tea gardens, grasslands, sweet potatoes
Note: Dry fields should be treated with broadleaf weeds, and they should be applied at the seedling stage. When the rice fields are weeded, they should be applied after drainage and watered after 2 days, otherwise the effects will be affected. The herbicidal effect is not good at low temperature, and the wheat field has good application effect in spring.
23, the spirit of the herb
It can prevent annual broadleaf weeds, such as: ç¹ç¹, 牛ç¹ç¼•, 泥胡èœ, 殃殃, 雀, grass, genus, genus, ragweed, cocklebur, etc. For the mother-in-law, the amaranth is a poor weed, and it is basically ineffective for rice leeks and leeks.
Use crops: rapeseed
Note: It is not valid for unearthed weeds. Amaranth rape is highly sensitive and cannot be used. There is a slight phytotoxicity to cabbage-type rapeseed (which can be recovered under normal circumstances) should be used in the late winter or greening period to avoid phytotoxicity. When used in late November, the leaves will have different degrees of phytotoxicity 2-3 days after the drug is used.
24. Mesotrione
Control the annual broad-leaved weeds and some grass weeds in corn fields, and have good effects on Solanum nigrum L., alfalfa, alfalfa, ramie, Xanthium, crabgrass, foxtail, goosegrass, etc. Grass weeds also have good results.
Use crops: corn
Note: Corn will have a short whitening phenomenon when the drug is too large, but it can return to normal in a short time, and has no effect on corn yield. Under normal rotation conditions, it is safe for post-buckwheat, rapeseed, potato, sugar beet, etc.
25, dioxin
It can control broadleaf weeds and grass weeds, such as castor, iron leeks, eucalyptus, medlar, mandala, purslane, nightshade, cocklebur, crabgrass, valerian, goosegrass, foxtail, etc. . The control effect on grass weeds is better than that of broad-leaved weeds, and it is not effective against sedge, anti-branched stalk, green stalk, and stalk.
Use crops: soybeans, sugar cane, rice, rape
Note: The herbicidal effect of this drug has a great relationship with soil moisture. If the moisture is good, the herbicidal effect is good. When the moisture is poor, the pre-mixed soil can be considered. Where conditions are available, irrigation should be carried out. When applying the drug, the dosage should be adjusted according to the soil texture.
26, chloroflupiric acid isooctine
Can control a variety of broad-leaved weeds (immediately dead: piglets, lacquer, cattle scorpion, mud broccoli, big nest vegetables, small crickets, hollow lotus seeds, leeks, sage). Invalid for grass weeds
Use crops: wheat, corn, rice
Note: If it is predicted to rain within 1 hour, it is not suitable for application. It has certain phytotoxicity to barley, and the phytotoxicity occurs when the sensitive variety exceeds 25 ml per mu.
27. Alachlor
Controls annual grass weeds and some broad-leaved weeds, and has certain herbicidal effects on alfalfa, soybean dodder, and purslane.
Use crops: soybeans, cotton, peanuts
Note: The weeding effect is greatly affected by soil moisture, and the good weeding effect is good. The soil is mixed before the sowing under drought and without irrigation. The depth of soil should not exceed 5CM.
28. Propisochloramide
Control of annual monocotyledon weeds and some broadleaf weeds
Use crops: corn, soybeans, cotton, rice, rape
Note: It can work in the wet soil and apply it before the weeds are unearthed.
29, rushing grass
It can control annual grass weeds, broadleaf weeds and sedge weeds, and has poor control effect on swine fever, wild stalk umbelliferous weeds and some legume weeds.
Use crops: rice, wheat, cotton, peanuts, soybeans, sugar cane, tea plantations, orchards, nurseries, corn, sorghum, celery, etc.
Note: This medicine is not safe and the dosage should be accurate. It is not suitable to use sandy soil with low matrix content. Avoid high temperature application, the temperature is higher than 30 degrees, it is easy to produce phytotoxicity. When used in paddy fields, it must be used after the field is green.
30, cyanide
It can prevent annual grass weeds and broadleaf weeds, and has poor effect on perennial weed sedge weeds.
Use crops: corn, sorghum
Note: After the application of rain or irrigation effect, the spring corn field is easy to apply after germination, and the application of the drug after the 4 leaf stage of the corn is easy to cause phytotoxicity. Temperature is too high or too low, corn is easy to produce phytotoxicity
31, thifensulfuron
Annual broad-leaved weeds have poor effects on grass weeds, and are ineffective against field spines, field grass, wild oats, foxtail, and brome
Use crops: wheat, soybeans, corn
Note: In arid environments, mixed or sequential application with organophosphorus pesticides may have short-lived phytotoxicity. The residual period is 30-60 days. Soybean is safe when the temperature is between 20 ° C / 10 ° C and 30 ° C / 20 ° C; when the temperature rises to 35 ° C / 25 ° C, the safety of soybeans decreases.
32. Methotrexate
Can effectively control a variety of broadleaf weeds and some annual grass weeds
Use crops: wheat, non-cultivated land, apple orchard, coniferous nursery
Note: The residual period of metsulfuron-methyl is relatively long, only in the wheat field in the lower reaches of the Yangtze River basin, and the acid soil with PH≤7.
33, benzosulfuron
Annual broadleaf weeds, on the field of flowers, field glutinous rice, wild oats, foxtail, buckwheat, coiled stalks, lacquer effect is not obvious
Use crop: wheat
Note: The activity of bensulfuron-methyl is high. It is necessary to strictly control the dosage when applying the drug, and pay attention to mixing with water. Avoid spraying the agent onto sensitive broadleaf crops when applying
34, oxyfluorfen
Annual monocotyledonous weeds are ineffective against perennial weeds. It is also possible to control perennial weeds such as cow felts, sponges, etc. in the case of better control of the paddy field.
Use crops: transplant rice, soybean, cotton, orchard, garlic, sugar cane, peanuts, apple orchard, forest nursery, ginger
Note: Apply evenly. The transplanted rice field uses this medicine, the rice seedling should be higher than 20CM should be more than 30 days of strong seedlings, the temperature is 20-30 °C. Apply dew on the dew on the field, and drain the water in time after application, keep 3-5CM
35, acifluorfen
It can control a variety of broadleaf weeds and also kill the aerial parts of perennial broadleaf weeds and sedge weeds. This medicine is particularly prominent for controlling purslane.
Use crops: soybeans, peanuts
Note: This medicine is easy to be used as a phytotoxicity. Brown spots may appear after application, and the dosage should be strictly controlled when applying. Spray should be uniform, it is best to test and promote. If the soybean is long in an adverse environment, it is not appropriate to apply this medicine.
36, isoproturon
Control of annual grass weeds and broadleaf weeds, also have good control effect on hard grass in wheat field, piglet, mother-in-law is resistant to this drug
Use crops: wheat, corn
Note: The wheat is safe under normal normal humidity. It can not be used as a growing plot. Rainfall or irrigation can improve the efficacy after application. The temperature is high and the herbicidal effect is high and the effect is rapid. Less than 4 ° C may cause phytotoxicity to wheat, generally recovering in the short term
37, dipentazone
It can prevent annual grass weeds and some broadleaf weeds. Such as crabgrass, foxtail, goosegrass, bluegrass, alfalfa, alfalfa, alfalfa, alfalfa, etc.
Use crops: corn, soybeans, cotton, vegetables, peanuts, ginger, tobacco, tobacco
Note: The effect of this agent on controlling monocotyledonous weeds is better than that of dicotyledonous weeds. In order to increase the absorption of chemicals by the soil and reduce the phytotoxicity of the crops, in the soil treatment, the water is applied first. Appropriate increase in the amount of drug encountered in sticky soil. After the vegetables are sowed, cover the soil 2-3cm to avoid contact with the seeds.
38. Alkene pyridine
Control annual and perennial grass weeds. The resistant weeds are: purple fescue, bluegrass. It is not effective for broadleaf grass and sedge.
Use crops: soybeans, cotton, peanuts, flax, beets, canola
Note: When used for post-emergence stem and leaf treatment, the dosage should be determined according to the growth of weeds and soil moisture. The amount of water suitable for weeds should be low, and vice versa.
39, sulcotrimone
It can effectively prevent a variety of grass weeds and broadleaf weeds such as foxtail, valerian, crabgrass, goosegrass, alfalfa, longan, and alfalfa. It has a good control effect on fragrant aconite.
Use crops: corn
Note: Corn will have a brief whitening when it is exposed to drought or low-lying water after application, but it has no effect on corn yield. Under normal rotation conditions, it is safe for post-buckwheat, rape, potato, and sugar beet.
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