Acetochlor : The effective period is 40 to 70 days. It is mainly kept in the soil layer of 0~3cm. It can cause phytotoxicity under high temperature, high humidity or low temperature and high humidity after medicine, but it can return to normal after 10~15 days. Applying medicine 24 to 72 hours after sowing is easy to cause phytotoxicity. The main part of the weed absorption is the bud, so it must be applied before the weeds are unearthed.
Acetochlor is a seedling herbicide that can be used to control grass, foxtail, crabgrass, goosegrass and other grass pests. It is suitable for various crops such as soybean, corn, peanut, etc., then the use of acetochlor herbicide What is it? Let's follow it with Xiaobian.
Acetochlor for crops
Applicable crops: soybean, corn, peanut, transplanted rape, cotton. Control objects: annual grass weeds such as valerian, foxtail, crabgrass, goosegrass, medlar, maiden, bluegrass, thousand gold, hard grass, wild oats, arm-shaped grass, golden foxtail, and stalk Some broad-leaved weeds of small seeds,
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Use of acetochlor herbicide
When corn, soybeans, peanuts, etc. are released, the seedlings are quickly combined with the seedlings. Then, 150 ml of acetochlor is applied to the acre, and 90 kg of water can be sprayed. From sowing to Miaoqi squatting for about 30 days, the weather is dry and rainless, weeds are scarce, and broad-leaved weeds such as alfalfa and anti-branches are concentrated and sprouted, which saves labor.
Since the spraying has been postponed for more than 30 days, the efficacy of the drug has been postponed backwards. By the time of the efficacy period, the crops have been tightly sealed, and even if there are a few weeds, they are incapable, as long as a small amount of broadleaf weeds can be removed. This kind of time-breaking spray is both labor-saving and efficient, and it also increases production, and it is more than one.
Acetochlor herbicide use precautions
1. The activity of acetochlor is very high, and the dosage should not be increased arbitrarily. If the organic matter content is high, it is recommended to use a higher dose in the case of clay loam or drought. On the contrary, if the organic matter content is low, the lower limit dose is recommended under the condition of sandy loam or rainfall irrigation.
2. Pay attention to the drainage after rain in the rainy season. The accumulated water will hinder the emergence of crops and cause phytotoxicity.
3, spray should be even, avoid heavy spray or leak spray.
4, rice, wheat, millet, sorghum, cucumber, spinach and other crops are more sensitive to acetochlor, not suitable for application
Tips: Beans are particularly sensitive to acetochlor, and the safety interval should be at least 2-3 months. The majority of farmers must pay attention.
Metolachlor: persistence of 30 to 35 days, 10 to 12 weeks after administration of active disappear. Monocotyledonous weeds are mainly absorbed by the bud sheath, and the dicotyledonous weeds are absorbed by the shoots and radicles, and are transmitted upwards to inhibit the growth of the shoots and fine roots. The sensitive weeds die after being germinated or just unearthed or poisoned. . Gramineous weeds have stronger absorption capacity than broadleaf. It is advisable to apply the medicine 3 to 5 days before transplanting. The seed is used for pre-emergence 1 to 2 days after the broadcast. The drug is easily degraded by soil microbes and has a moderate effect period.
Applicable to:
Soybeans, corn (including popcorn, sweet corn), peanuts, potatoes, cotton, pumpkin, watermelon, beets, canola, sunflower, flax, kenaf, sesame, safflower, sugar cane and other dry crops, also in ginger and cabbage, etc. Cruciferae, Solanaceae, Umbelliferae and other vegetables and orchards, nurseries.
Registration range
Soy, corn, peanuts, cotton, sugar cane, etc.
Other country registration scope
Soybeans, Beans, Chickpeas, Mung Beans, Cotton, Corn (including popcorn, sweet corn), peanuts, peas, potatoes, safflower, sorghum, canola, sunflower, sugar cane, etc.
Control object
Valerian, foxtail, golden foxtail, goosegrass, bluegrass, wild pheasant, teff, arm-shaped grass, ryegrass, alfalfa, foxtail, comfrey, mustard, onion sesame, oil sedge (in sandy soil) And in the loamy soil), the thorny needle, the toon, the scorpion, etc., the thorns of the willow, the sorrel, the scorpion, the scorpion, the sage, the sedge, the purslane, the scorpion, the scorpion, the scorpion , anti-twig, pig's head, hot pepper, etc. have better control effect.
Application period
1) Soybeans, corn, rapeseed, peanuts, potatoes, celery, etc. are applied before seeding and after sowing. Soybean application before application can be divided into autumn application and spring application, and autumn application is best.
2) Apply sesame seeds before seeding.
3) Watermelon and pumpkin live field are applied before emergence after sowing. The transplanted field is applied before or after transplanting, and the film is applied before filming.
4) Beet live field is applied before emergence, and it is best to apply immediately after sowing. The transplanted field is applied before transplanting.
5) Cabbage and broccoli transplanting fields are applied before transplanting or after transplanting.
6) Garlic bare ground planting and film field are applied within 3 days after sowing.
7) The pepper live field is applied before sowing, the transplanted field is applied before transplanting, and the mulching film is transplanted before the film is applied.
8) The eggplant and tomato open field transplanting fields are applied before transplanting, and the mulching film is applied to the transplanting field before the film is applied.
9) The amaranth nursery is applied immediately after seed sowing, and the old leeks field is applied 2 days after cutting.
10) Sugar cane fields. 1 Apply sugar before planting of sugarcane. 2 Sugarcane coated field (clearing or interplanting) before application of film.
11) Before the seedlings are planted, the carrots are applied within 5 days after sowing.
Dosage
1) Soybeans, corn, and rapeseed fields. When the soil organic matter content is less than 3%, the sandy soil uses 72% metolachlor 100 ml/mu, the loam soil is 140 ml/mu, the clay soil is 187 ml/mu; when the soil organic matter content is 3% or more, 72% of metformin sandy soil is 140 ml/mu, loamy soil is 187 ml/mu, and clay soil is 233 ml/mu. In the south, 72% metolachlor is generally used in an amount of 100 to 150 ml/mu.
2) Peanut field. 72% metolachlor 150 ~ 200 ml / acre, plastic film cultivation of spring peanuts and summer peanuts can be appropriately reduced, available 72% metolachlor 100 ~ 150 ml / acre.
3) Watermelon, pumpkin, potato, beet, cotton, sesame field. 72% metolachlor EC 100-200 ml / mu. Mixed use: potato field with 72% metolachlor 100 ~ 187 ml / acre + 70% oxazinone 20 ~ 40 g / ag.
4) Cabbage and broccoli transplanted fields were transplanted with 72% metolachlor 80-127 ml/mu before transplanting.
5) Pepper, eggplant, tomato, ginger, garlic field. 72% metolachlor 100-150 ml / mu.
6) Cabbage live field. North China uses 72% metolachlor 80-100 ml / mu. In the middle and lower reaches of the Yangtze River, the summer-sown cabbage was 72% with 10% metochlor 50-80 ml/mu.
7) Celery nursery. 72% metolachlor 100-127 ml / mu.
8) Amaranth nursery. 72% metolachlor 100-127 ml / mu. Old leeks field 72% metolachlor 80 ~ 100 ml / mu. There are many kinds of vegetables, and annual vegetables such as leeks, coriander, and celery, which are propagated by small seeds, are sensitive to metolachlor and should not be used.
9) Sugar cane fields. 1 After sugarcane planting, use 72% metolachlor 100-200 ml/mu before seedling. Mixed use: 72% metolachlor 100 ml / acre + 38% atrazine 100 ~ 200 ml / acre. 2 Sugarcane coated field (clearing or interplanting) with 72% metolachlor 100-150 ml/mu before mulching.
10) Carrot field. 72% metolachlor 100 ~ 200 ml / mu
The use of purified metolachlor in the transplanted crop field should be applied after transplanting the whole field, and should not be turned over the soil around the open hole during transplanting. If it is necessary to apply the medicine after transplanting, try not to spray the liquid onto the crop, or spray the water in time to spray the seedlings after spraying.
Safe use and poisoning rescue
1) The maximum allowable daily intake (ADI) per person is recommended to be 0.65 mg/kg.
2) Do not smoke or eat during the application. Wash hands, face and bare skin after application. Empty bottles must not be reused.
3) There is no special detoxification drug, and the treatment of poisoning symptoms is found.
Precautions
1) The metformin emulsifiable concentrate meets the low temperature below 0 °C, some of which will form crystal precipitation, and will be re-dissolved and restored to the original state when the temperature is high. The winter storage in the north should be checked 1 month before use. If any crystal is found, the medicine can be taken. The barrel is placed at room temperature of 20～22°C, and it is continuously rolled for more than 24 hours. The barrel can also be placed in the water at 45°C for continuous rolling, and the water is kept heated to maintain the constant temperature. Generally, it can be restored in 3~5 hours.
2) Vegetable fields should pay special attention to the increase of soil organic matter content after application of organic fertilizer, and the dosage of metolachlor should be appropriately increased according to the amount of organic fertilizer applied.
3) There are many kinds of vegetables. The annual vegetables such as leeks, coriander and celery, which are propagated by small seeds, are sensitive to metolachlor and should not be used.
4) Beet fields have phytotoxicity under high humidity and low temperature conditions, and do not exceed the recommended dosage.
5) It is forbidden to add metolachlor to the irrigation water. It is easy to produce phytotoxicity when the corn is planted in water.
6) Metoclopramide is not recommended for kidney beans and red beans that are not excavated.
7) Metolachlor is not recommended for saline-alkali soil, plastic film-covered fields, and drip irrigation fields.
8) The unregistered range is tested and tested, and the metformin is used after the technology is mature.
Alachlor : The time to control weeds is generally about 60 days. Can be adsorbed by the soil, not easy to leaching, and not easy to volatilize. Rice, sorghum, millet, cucumber, leeks, and spinach crops are very sensitive to it. The depth of the mixed soil is preferably not more than 5 cm.
Acetochlor Scope: Suitable for crop fields such as soybean, corn, peanut, cotton, potato, sugar cane, rape, etc., control of valerian, crabgrass, valerian, foxtail, autumn scorpion, arm-shaped grass, purslane, scorpion, 1 year old grass weeds and broadleaf weeds such as corn grass, alfalfa and alfalfa. There is also a certain effect on the dodder.
Propionamide : The duration of use in paddy fields is 30 to 50 days. When used alone, it can only be used for transplanting paddy fields. It is harmful to seedlings when used in polders and live fields. However, the addition of safeners can make up for the deficiency. When the dosage is too large, the leaves of the seedlings, the tip of the leaves and the leaves are green and curled, and the growth of the plants is inhibited.
Acetochlor is suitable for rice control of alfalfa, bald oyster, thousand gold, goosegrass, cow felt, narrow leaf diarrhea, water leek, shaped sedge, broken rice sedge, clove scorpion, ragweed, etc. Undergraduate and broadleaf weeds.
Use in direct water field or in Putian: After germination of rice seeds, the soil is leveled, and soil spray treatment is carried out 2-4 days after sowing (after rice rooting is established). The southern rice is used in 50 ml/mu, and the north is added according to local conditions. Use 70-80 ml/mu, spray 30 kg of water on the soil surface, use the back field block to not have accumulated water, keep the soil moist for 3-5 days and then carry out normal water and fertilizer management.
G alachlor: the persistence of about 40 days. Cucumber is very sensitive to it, and its safety is worse than that of butachlor. It is not suitable for rice field, live field and seedling, weak seedling and water leakage.
Naproxil (Daihuili, dichlorpyrifos): half-life of up to 12 weeks. It is effective in the pre-emergence or post-emergence 1 leaf stage. Gramineous wheat, Liliaceae, celery, fennel, fennel, and lettuce are sensitive to it.
Butachlor : The residual effect period is about 60 days. It is effective for weeds and weeds before the 2-leaf stage. Putian is used for 3 days after sowing, and the herbicidal effect is good; before or after herbicidal effect is general, it is easy to produce phytotoxicity in advance. Water can't drown in the heart.
Butachlor application in dry field applications requires application under soil wetting conditions. It can prevent annual grass weeds and some dicotyledon weeds such as valerian, crabgrass, foxtail, oxweed, ragweed, sage, and shaped grass. It is suitable for weeding in cabbage, bean, radish, cabbage, solanaceous, spinach and other vegetable fields.
It has an inhibitory effect on the ragweed and the intestines, and is ineffective against most broad-leaved weeds and perennial weeds such as dwarf sage, eyed amaranth, and water peanut. And for weeds, "only kill buds and not kill grass."
Propisochlor: persistence of 60 to 80 days after the crop safety. It is not effective for perennial grass weeds and broadleaf weeds. The drug is suitable for mulching field, irrigated fields and summer crops and southern dryland applications. Rice buds are very sensitive to them.
Diphenamid alachlor: Vinca long. It takes about one year after application to grow wheat, etc., and only kill the weeds before germination.
Benzoyl oxalate (: for a period of more than 1 month, used in paddy fields. For special effects on alfalfa, rice is transplanted 3 to 10 days after application, and the water retaining layer is 3 to 4 cm. Do not apply at rice seedling stage. Especially not in the seedling stage.
Pirfenamide: The half-life in soil is 16 to 20 weeks, which can prevent a variety of weeds in wheat fields. Most of the "oxachlor" herbicides on the market are amide herbicides, mostly soil treatment agents, which are mainly applied before the crops are post-emergence.
Four factors affecting rice tillering
1, temperature
The effect of temperature on water tillering is relatively large. Under normal conditions, the temperature of tillering can be between 20 and 33 degrees. In this interval, it can be divided into two parts, and between 25 and 30 degrees, it is the best for tillering. Temperature, once the temperature is lower than 15 degrees or higher than 35 degrees, it will affect the normal tillering of rice, and severely stop the tillering directly, resulting in a decrease in tillering.
2, lighting
There are 2 factors in lighting, one is determined according to the lightness and time of illumination. For example, when there is continuous rainy weather in the tillering period, the lack of sunshine time will affect rice tillering, which is characterized by late tillering, short tillering time and number of tillers. The other one is caused by over-planting. When there are too many plants in the field, they will block each other. In this case, it will also affect the light (that is, photosynthesis). The more you have, the opposite is true. If you plant too densely, the tillers will decrease and affect the final yield.
3, moisture
The tillering stage of rice is still sensitive to water. According to normal conditions, if the water layer is too deep, it will affect the normal tillering, while shallow irrigation will be beneficial to tillering. There are data showing that when the weather is around 26-33 degrees, When the soil water holding capacity is 80%, the tiller is the most. On the contrary, when the temperature is lower than 20 degrees and the soil water holding capacity is 100%, the tiller is the least (this is not a case in general).
4, nutrients
Nutrients are also an important factor in rice tillering. Rice needs to be supplemented with nutrients throughout the growing season, but not only nitrogen fertilizer, but other elements, such as zinc deficiency and phosphorus deficiency, will affect normal tillers, while water and fertilizer will be applied. It seems necessary to apply a tiller fertilizer half a month after transplanting or transplanting, which is conducive to promoting rice tillering.
Understand the four major factors affecting rice tillers, the following will talk about how to improve rice tillers, in fact, according to the above factors, the solution is also 4 points, together.
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