1. Soil treatment before sowing
40% ethyl hydrazine suspension (Bai A mixture) This agent is a special special grass for corn field, and annual grass weeds such as crabgrass, foxtail, valerian, goosegrass, thousand gold, teff, Bluegrass and other annual broadleaf weeds such as alfalfa, alfalfa, alfalfa, nightshade, arbor, sputum, purslane, iron leeks, sorghum, sorghum, sphagnum, fly lian, small white wine grass, duck carp Grass and so on have excellent control effects, and also have obvious inhibitory effects on sedge weeds.
The drug not only has a wide herbicidal spectrum, but also has high herbicidal activity and long service life. It is safe for corn and glutinous crops, etc., before the sowing of corn, before the emergence of the three-leaf stage of the weeds after corn emergence, every minute is used. 40% ethyl hydrazine suspension emulsion, 2250 ~ 3000 grams of summer maize in North China, 2250 ~ 3750 grams of spring corn in North China, 4500 ~ 6000 grams of spring maize in northeast, about 750 liters of water, even spray, field duration of 50 to 60 days, once The use of medicine can ensure that the whole growth period of the corn is not affected by weeds.
The herbicidal effect of acetamidine water is closely related to soil moisture. When the humidity is high, the drug effect is good, and when the soil is dry, the drug effect is low. Usually, it is necessary to pour 1 time of water or rainfall before applying the medicine. It is necessary to strictly control the medicine. It is best to apply the medicine before the weeds are excavated to ensure the full effect of the medicine. If it is used after excavation, it is better to use the weeds. Before the leaf stage, after the four-leaf stage of weeds, if the grass age is too large and then the drug is used, the drug efficacy will be lowered due to the improvement of the resistance of the weeds, and the amount of the drug should be reduced when using the agent in the sandy soil with low organic matter content.
E-barrel mix: This drug is a blend of acetochlor and saponin. It can be used in corn fields and corn and soybean fields to effectively control annual grasses and annual and partial perennial Leaf weeds, field-sustaining period of 30 to 60 days is safe for crops such as corn, soybeans and glutinous wheat. Apply before or after planting. In the spring corn field in the northeastern region, each branch is treated with 50% acetochlor 3000 ml plus 75% Bao 26.7 g; in summer corn (or soy) field, 50% acetochlor 1500 ml per step and 75% treasure Receive 19.95 grams; spray 450 to 7505 or evenly. When dispensing, first collect the treasure in a small cup with a small amount of warm water to make a mother liquid, pour into a mixed medicine bucket that has half of the water volume, then add acetochlor, then add the other half of the water and mix well, with a fan-shaped nozzle The application effect is the best.
50% Hebao Emulsifiable Oil: This medicine is a new type of herbicide with high efficiency, broad spectrum and safety. It can effectively prevent a variety of annual grass weeds and broadleaf weeds, against crabgrass, valerian, goosegrass, foxtail, big teff, thousand gold, chloris, sorrel, scorpion, scorpion, gray scorpion, The anti-branched locust, the hedgehog, the scorpion scorpion, the purslane, the iron leeks, the calves and the nightshade are most effective, and also have obvious inhibitory effects on some perennial weeds and sedge weeds.
50% Hebao emulsifiable concentrate can be used for soil sealing treatment before sowing, or can be treated as stem after 3 days of weeding of corn. Each minute is used with 50% Hebao EC 1.2-1.5 liters, and water is added 750 liters evenly. Spray can effectively control a variety of weeds. The relationship between soil moisture and drug efficacy is close, and the humidity is suitable for high efficacy when the condition is good. The drug is sensitive to weed shoots and has the best application effect before or after the sowing.
50% of the mixture is used in the corn seedlings before sowing, using 50% of the mixture of 2 to 35 kg per hectare, adding 750 liters of water, evenly spraying on the soil surface, against the crabgrass, the tendon grass, the foxtail, the teff, The annual grasses and annual broadleaf weeds such as cockroaches, scorpion scorpions, scorpion scorpions, scorpion scorpions, scorpion scorpions, Xanthium, purslane, Solanum nigrum, and cotton have good control effects.
Atrazine (Atrazine) is a selective pre-emergence bud herbicide for striated benzene. It can be used to control crabgrass, foxtail, teff, goosegrass, leeks, cockroaches, cocklebur, and fangs. Annual and dicotyledonous weeds such as alfalfa, Solanum nigrum L., Dioscorea opposita L., and Phyllostachys pubescens, and Phyllostachys pubescens have a de facto inhibitory effect on certain deep-rooted weeds.
Before the seeding of the corn, 38% of the atrazine suspension was used for 2.25 to 2.7 kg per minute. In the corn seedling stage, before the weed 3 leaf stage, 38% of atrazine was used for each minute, and the water was added 750. Rise evenly spray.
Atrazine has good efficacy and is very selective for corn. It is safe, but the field residual period is as long as 120-160 days. If it is used improperly, it will cause phytotoxicity in the crops. It is necessary to strictly control the dosage, and do not increase the dosage arbitrarily, and pay attention to uniform application to avoid heavy spray and leakage. Atrazine can be mixed with acetochlor, dol, lasso and chlorpyrifos, which not only expands the herbicidal spectrum, but also reduces soil residues, and recommends wheat safety.
Acetochlor: an amide-based selective pre-emergence herbicide, which has special effects on annual grass weeds such as goosegrass, crabgrass, valerian, foxtail, teff, millennium, bluegrass, and wild pheasant. Broad-leaved weeds such as alfalfa, alfalfa and purslane also have good control effects. After acetochlor is absorbed, corn can be quickly degraded into non-toxic substances. Therefore, for corn safety, in the northeast region after corn sowing, 50% acetochlor EC 2.25 ~ 3.75 kg, North China and South, 50% acetochlor EC 1.2-2.5 kg per hectare, 750 liters of water evenly sprayed the surface, the amount of film cover field reduced by about 1/3.
Fertile soils and areas with high organic matter content should be dosed up; areas with low soil and low organic matter should be appropriately reduced. The high humidity of the soil is conducive to the absorption of herbicides by weed seeds, and the effect of the drug is good. The soil drought affects the effect of the drug. Therefore, it is better to pour the land or have rainfall before the application, so that the soil has good moisture.
Duer (metolachlor): For selective pre-emergence soil treatment of herbicides, the effect of controlling grassy weeds is better than that of broadleaf weeds. Before the seeding of the corn, the seedlings were used with 1.2% to 1.8 kg of 72% Duer emulsifiable concentrate per hectare, and evenly sprayed with 750 liters of water. The sandy soil is used in a low amount, and the clay is used in a high amount. When the soil surface is dry, it is preferable to mix the soil.
Lasso (Alachlor): an amide-selective pre-emergence herbicide with high herbicidal activity and a cut-off period of 4 to 8 weeks in the soil. It can effectively control annual grasses and some annual cotyledons. Weeds. Before the seeding of the corn, use 48% of the cable emulsifier for 3 to 4.5 thousand to eat a large pot of rice, and add 750 liters of water to evenly spray. If it is rained or irrigated within 1 week after application, it is beneficial to the effect of the drug. Under the condition of drought, the soil should be mixed with shallow soil, and the depth of soil mixing is 2~4 cm, which can improve the herbicidal effect.
He Nisi: It is an amide-selective pre-emergence herbicide. He is resistant to alfalfa weeds and shredded rice, such as yarrow, foxtail, Qianjin, Shanghe, and Mai Niang.è‹‹, è·–è‰, longan, purslane, huanghuaxiang aconite, etc. also have a control effect. It should be applied before weed emergence, and weeds cannot be killed after weed sprouting. Before the seeding of corn, the North China region uses 0.9% of Heiners EC in 0.9-1.2 liters per hectare, 1.5-1.8 liters in the northeast, 0.6-0.9 liters in the Yangtze River Basin and South China, and 450-675 ml of corn covered with plastic film. ~ 900 liters, spray the surface. After the application, a certain amount of soil moisture is needed to fully exert the effect. In areas with less drought or less rainfall, soil treatment before sowing can be used. After application, the shallow mixed soil is 2 to 3 cm, and the soil is planted after mixing.
Mixing of herbicides: Different herbicides have different herbicidal spectrum. Although some herbicides have a broad spectrum of herbicides, due to crop safety, the herbicidal spectrum is limited. The water-soluble or field-to-field duration is too long, and excessive dosage or uneven application of the fertilizer is likely to cause residual toxicity to the current crop or the post-crop or post-crop crop. Therefore, in the production, the two herbicides with different herbicidal spectrums and complementary advantages and disadvantages are appropriately mixed and mixed, so that the expansion of the herbicidal spectrum significantly improves the herbicidal effect, and also avoids the phytotoxicity and the cockroach crops for the seasonal crops. The possibility of residual poisoning.
2. Stem and leaf spray
Abao barrel mixture is a post-emergence one-time herbicide used in the jade field composed of indigo and Baocheng. It is used to control weeds, crabgrass, goosegrass, foxtail, wild oats, wild sorghum, sorghum, sorghum. , a variety of cornfield grass weeds, and a variety of corn fields, such as cauliflower, comfrey, leeks, purslane, pig hair, wolf grass, wild melon seedlings, ragweed, leeks, stalks, and thorns Broadleaf weeds. The effective period is moderate, and it is safe for seasonal crops and crops. Under drought conditions, it can also achieve good herbicidal effect. It is applied in the 3~5 leaf stage of corn. North China summer corn field with 38% atrazine 1500 ml per hectare plus 25% Baocheng 60 g, northeast spring Yutian every minute with 38% atrazine 2250 ml plus 25% Baocheng 750 g, add water 450 liters, even spray If a nonionic surfactant or a neutral detergent powder having a spray amount of 0.1% to 0.2% is added, the herbicidal effect can be improved.
3 to 5 leaf stage after emergence of maize, 1 to 2 leaf stage of monocotyledonous weeds, 2 to 4 leaf stage of dicotyledonous weeds, 40 to 3750 ml of emulsion suspension for each minute, or 4% of jade farmers Le water agent 1200 ~ 2500 ml, or 50% can be mixed 3000 ml, or 38% atrazine suspension 2250 ml plus 33% weeding emulsified milk 1500 ml, or 38% atrazine suspension 2250 ml plus 4 % Yu Nong Le water agent 900 ml, or 38% atrazine gel suspension 1800 ml plus 48% paraquat water 300 ml, add water 750 kg even spray, broad-leaved weeds occur in corn fields, can be corn 4 to 6 leaf stage, with 75% of superstar suspension (15 grams of superstar), or 75% of 75% (wide leaf), or 375 to 450 ml of 48% water, or 72 %2,4- butyl butyl emulsifiable concentrate 750 ml, or 20% to make it lower emulsifiable concentrate 750-900 ml, add water 450 liters, spray evenly.
In some areas, before and after the sowing of corn, due to the labor shortage in the busy season of Sanxia, ​​or because the weather is hot and rainy, it is too late to apply herbicide and weeding. In the middle and late stages of corn growth, grass waste is used, and each aliquot is used with 3 gram of trace water, 3 liters per minute, or 10% glyphosate water 9-12 liters, 41% Nongda water agent 3 ~ 4.5 liters, add water 450 liters, add a cover on the spray head, spray the weeds, try to avoid spraying the liquid to the corn stalk On the leaf.
3. No-till corn field
The B-Ale barrel blend made from B-A mixture and farmer's music is an ideal herbicide for no-tilling and sowing corn fields. The herb has a broad spectrum of herbicidal and remarkable effects, and can not only control all the weeds that have emerged, but also control or control the annual growth of the seedlings of the grasses and broadleaf weeds that have not emerged; the long-lasting effect, one application The medicine can ensure that the whole growing season is not affected by weeds, and it is safe for the season and the later crops. After the wheat is harvested, 40% of the mixture is used for 25% to 3,000 grams plus 74.7% before the corn is planted. The farmers are 600-900 grams, 450 liters of water, the height of the nozzle should be higher than 30F of weeds, and spray evenly.
4. Plastic film covering corn field
In the spring and corn areas with low temperature and drought, there are often mulching techniques to increase the temperature and temperature of the mulch to promote the emergence of corn. Because of the high temperature inside the mulch, the temperature is very beneficial to the efficacy of herbicides. Therefore, compared with the application of the open field, the lower herbicide dosage (usually 1/4 to 1/2 less than the conventional dosage) can achieve good herbicidal effect, 40% ethyl hydrazine per minute. Suspension emulsion 1800 ~ 2250 ml, or 50% acetochlor EC 750 ~ 1050 ml, or 72% Duer EC 900 ~ 1200 ml, 90% Wones EC 80 ~ 750 ml, or 48% cable emulsifier 2250 ml, Or 33% weeding emulsified milk 1500 ~ 2250 ml, after the corn seeding suppression, add 450 ~ 750 liters of water, spray evenly, and then cover the membrane. If it is a seedling application, the dosage should be calculated based on the actual drug area.
5. Wheat straw cornfield
The wheat and corn interplanting cultivation in North China is to sow the corn on the stalks of the wheat field in the middle and late May, and calculate the dosage according to the corn planting area (ie, the actual application area) before sowing, and spray the soil surface after the wheat harvest. Rotary tillage and cockroach, remove the residual weeds in the wheat field, and then apply the medicine according to the actual spraying area. In order to improve labor efficiency, corn can be used for sowing without applying medicine. After the wheat is harvested (the corn has emerged), the soil is treated with a herbicide, such as 40% acetaminophen. Suspending agent, E-bucket mix and 50% Hebao emulsifiable concentrate.
40% ethyl hydrazine suspension (Bai A mixture) This agent is a special special grass for corn field, and annual grass weeds such as crabgrass, foxtail, valerian, goosegrass, thousand gold, teff, Bluegrass and other annual broadleaf weeds such as alfalfa, alfalfa, alfalfa, nightshade, arbor, sputum, purslane, iron leeks, sorghum, sorghum, sphagnum, fly lian, small white wine grass, duck carp Grass and so on have excellent control effects, and also have obvious inhibitory effects on sedge weeds.
The drug not only has a wide herbicidal spectrum, but also has high herbicidal activity and long service life. It is safe for corn and glutinous crops, etc., before the sowing of corn, before the emergence of the three-leaf stage of the weeds after corn emergence, every minute is used. 40% ethyl hydrazine suspension emulsion, 2250 ~ 3000 grams of summer maize in North China, 2250 ~ 3750 grams of spring corn in North China, 4500 ~ 6000 grams of spring maize in northeast, about 750 liters of water, even spray, field duration of 50 to 60 days, once The use of medicine can ensure that the whole growth period of the corn is not affected by weeds.
The herbicidal effect of acetamidine water is closely related to soil moisture. When the humidity is high, the drug effect is good, and when the soil is dry, the drug effect is low. Usually, it is necessary to pour 1 time of water or rainfall before applying the medicine. It is necessary to strictly control the medicine. It is best to apply the medicine before the weeds are excavated to ensure the full effect of the medicine. If it is used after excavation, it is better to use the weeds. Before the leaf stage, after the four-leaf stage of weeds, if the grass age is too large and then the drug is used, the drug efficacy will be lowered due to the improvement of the resistance of the weeds, and the amount of the drug should be reduced when using the agent in the sandy soil with low organic matter content.
E-barrel mix: This drug is a blend of acetochlor and saponin. It can be used in corn fields and corn and soybean fields to effectively control annual grasses and annual and partial perennial Leaf weeds, field-sustaining period of 30 to 60 days is safe for crops such as corn, soybeans and glutinous wheat. Apply before or after planting. In the spring corn field in the northeastern region, each branch is treated with 50% acetochlor 3000 ml plus 75% Bao 26.7 g; in summer corn (or soy) field, 50% acetochlor 1500 ml per step and 75% treasure Receive 19.95 grams; spray 450 to 7505 or evenly. When dispensing, first collect the treasure in a small cup with a small amount of warm water to make a mother liquid, pour into a mixed medicine bucket that has half of the water volume, then add acetochlor, then add the other half of the water and mix well, with a fan-shaped nozzle The application effect is the best.
50% Hebao Emulsifiable Oil: This medicine is a new type of herbicide with high efficiency, broad spectrum and safety. It can effectively prevent a variety of annual grass weeds and broadleaf weeds, against crabgrass, valerian, goosegrass, foxtail, big teff, thousand gold, chloris, sorrel, scorpion, scorpion, gray scorpion, The anti-branched locust, the hedgehog, the scorpion scorpion, the purslane, the iron leeks, the calves and the nightshade are most effective, and also have obvious inhibitory effects on some perennial weeds and sedge weeds.
50% Hebao emulsifiable concentrate can be used for soil sealing treatment before sowing, or can be treated as stem after 3 days of weeding of corn. Each minute is used with 50% Hebao EC 1.2-1.5 liters, and water is added 750 liters evenly. Spray can effectively control a variety of weeds. The relationship between soil moisture and drug efficacy is close, and the humidity is suitable for high efficacy when the condition is good. The drug is sensitive to weed shoots and has the best application effect before or after the sowing.
50% of the mixture is used in the corn seedlings before sowing, using 50% of the mixture of 2 to 35 kg per hectare, adding 750 liters of water, evenly spraying on the soil surface, against the crabgrass, the tendon grass, the foxtail, the teff, The annual grasses and annual broadleaf weeds such as cockroaches, scorpion scorpions, scorpion scorpions, scorpion scorpions, scorpion scorpions, Xanthium, purslane, Solanum nigrum, and cotton have good control effects.
Atrazine (Atrazine) is a selective pre-emergence bud herbicide for striated benzene. It can be used to control crabgrass, foxtail, teff, goosegrass, leeks, cockroaches, cocklebur, and fangs. Annual and dicotyledonous weeds such as alfalfa, Solanum nigrum L., Dioscorea opposita L., and Phyllostachys pubescens, and Phyllostachys pubescens have a de facto inhibitory effect on certain deep-rooted weeds.
Before the seeding of the corn, 38% of the atrazine suspension was used for 2.25 to 2.7 kg per minute. In the corn seedling stage, before the weed 3 leaf stage, 38% of atrazine was used for each minute, and the water was added 750. Rise evenly spray.
Atrazine has good efficacy and is very selective for corn. It is safe, but the field residual period is as long as 120-160 days. If it is used improperly, it will cause phytotoxicity in the crops. It is necessary to strictly control the dosage, and do not increase the dosage arbitrarily, and pay attention to uniform application to avoid heavy spray and leakage. Atrazine can be mixed with acetochlor, dol, lasso and chlorpyrifos, which not only expands the herbicidal spectrum, but also reduces soil residues, and recommends wheat safety.
Acetochlor: an amide-based selective pre-emergence herbicide, which has special effects on annual grass weeds such as goosegrass, crabgrass, valerian, foxtail, teff, millennium, bluegrass, and wild pheasant. Broad-leaved weeds such as alfalfa, alfalfa and purslane also have good control effects. After acetochlor is absorbed, corn can be quickly degraded into non-toxic substances. Therefore, for corn safety, in the northeast region after corn sowing, 50% acetochlor EC 2.25 ~ 3.75 kg, North China and South, 50% acetochlor EC 1.2-2.5 kg per hectare, 750 liters of water evenly sprayed the surface, the amount of film cover field reduced by about 1/3.
Fertile soils and areas with high organic matter content should be dosed up; areas with low soil and low organic matter should be appropriately reduced. The high humidity of the soil is conducive to the absorption of herbicides by weed seeds, and the effect of the drug is good. The soil drought affects the effect of the drug. Therefore, it is better to pour the land or have rainfall before the application, so that the soil has good moisture.
Duer (metolachlor): For selective pre-emergence soil treatment of herbicides, the effect of controlling grassy weeds is better than that of broadleaf weeds. Before the seeding of the corn, the seedlings were used with 1.2% to 1.8 kg of 72% Duer emulsifiable concentrate per hectare, and evenly sprayed with 750 liters of water. The sandy soil is used in a low amount, and the clay is used in a high amount. When the soil surface is dry, it is preferable to mix the soil.
Lasso (Alachlor): an amide-selective pre-emergence herbicide with high herbicidal activity and a cut-off period of 4 to 8 weeks in the soil. It can effectively control annual grasses and some annual cotyledons. Weeds. Before the seeding of the corn, use 48% of the cable emulsifier for 3 to 4.5 thousand to eat a large pot of rice, and add 750 liters of water to evenly spray. If it is rained or irrigated within 1 week after application, it is beneficial to the effect of the drug. Under the condition of drought, the soil should be mixed with shallow soil, and the depth of soil mixing is 2~4 cm, which can improve the herbicidal effect.
He Nisi: It is an amide-selective pre-emergence herbicide. He is resistant to alfalfa weeds and shredded rice, such as yarrow, foxtail, Qianjin, Shanghe, and Mai Niang.è‹‹, è·–è‰, longan, purslane, huanghuaxiang aconite, etc. also have a control effect. It should be applied before weed emergence, and weeds cannot be killed after weed sprouting. Before the seeding of corn, the North China region uses 0.9% of Heiners EC in 0.9-1.2 liters per hectare, 1.5-1.8 liters in the northeast, 0.6-0.9 liters in the Yangtze River Basin and South China, and 450-675 ml of corn covered with plastic film. ~ 900 liters, spray the surface. After the application, a certain amount of soil moisture is needed to fully exert the effect. In areas with less drought or less rainfall, soil treatment before sowing can be used. After application, the shallow mixed soil is 2 to 3 cm, and the soil is planted after mixing.
Mixing of herbicides: Different herbicides have different herbicidal spectrum. Although some herbicides have a broad spectrum of herbicides, due to crop safety, the herbicidal spectrum is limited. The water-soluble or field-to-field duration is too long, and excessive dosage or uneven application of the fertilizer is likely to cause residual toxicity to the current crop or the post-crop or post-crop crop. Therefore, in the production, the two herbicides with different herbicidal spectrums and complementary advantages and disadvantages are appropriately mixed and mixed, so that the expansion of the herbicidal spectrum significantly improves the herbicidal effect, and also avoids the phytotoxicity and the cockroach crops for the seasonal crops. The possibility of residual poisoning.
2. Stem and leaf spray
Abao barrel mixture is a post-emergence one-time herbicide used in the jade field composed of indigo and Baocheng. It is used to control weeds, crabgrass, goosegrass, foxtail, wild oats, wild sorghum, sorghum, sorghum. , a variety of cornfield grass weeds, and a variety of corn fields, such as cauliflower, comfrey, leeks, purslane, pig hair, wolf grass, wild melon seedlings, ragweed, leeks, stalks, and thorns Broadleaf weeds. The effective period is moderate, and it is safe for seasonal crops and crops. Under drought conditions, it can also achieve good herbicidal effect. It is applied in the 3~5 leaf stage of corn. North China summer corn field with 38% atrazine 1500 ml per hectare plus 25% Baocheng 60 g, northeast spring Yutian every minute with 38% atrazine 2250 ml plus 25% Baocheng 750 g, add water 450 liters, even spray If a nonionic surfactant or a neutral detergent powder having a spray amount of 0.1% to 0.2% is added, the herbicidal effect can be improved.
3 to 5 leaf stage after emergence of maize, 1 to 2 leaf stage of monocotyledonous weeds, 2 to 4 leaf stage of dicotyledonous weeds, 40 to 3750 ml of emulsion suspension for each minute, or 4% of jade farmers Le water agent 1200 ~ 2500 ml, or 50% can be mixed 3000 ml, or 38% atrazine suspension 2250 ml plus 33% weeding emulsified milk 1500 ml, or 38% atrazine suspension 2250 ml plus 4 % Yu Nong Le water agent 900 ml, or 38% atrazine gel suspension 1800 ml plus 48% paraquat water 300 ml, add water 750 kg even spray, broad-leaved weeds occur in corn fields, can be corn 4 to 6 leaf stage, with 75% of superstar suspension (15 grams of superstar), or 75% of 75% (wide leaf), or 375 to 450 ml of 48% water, or 72 %2,4- butyl butyl emulsifiable concentrate 750 ml, or 20% to make it lower emulsifiable concentrate 750-900 ml, add water 450 liters, spray evenly.
In some areas, before and after the sowing of corn, due to the labor shortage in the busy season of Sanxia, ​​or because the weather is hot and rainy, it is too late to apply herbicide and weeding. In the middle and late stages of corn growth, grass waste is used, and each aliquot is used with 3 gram of trace water, 3 liters per minute, or 10% glyphosate water 9-12 liters, 41% Nongda water agent 3 ~ 4.5 liters, add water 450 liters, add a cover on the spray head, spray the weeds, try to avoid spraying the liquid to the corn stalk On the leaf.
3. No-till corn field
The B-Ale barrel blend made from B-A mixture and farmer's music is an ideal herbicide for no-tilling and sowing corn fields. The herb has a broad spectrum of herbicidal and remarkable effects, and can not only control all the weeds that have emerged, but also control or control the annual growth of the seedlings of the grasses and broadleaf weeds that have not emerged; the long-lasting effect, one application The medicine can ensure that the whole growing season is not affected by weeds, and it is safe for the season and the later crops. After the wheat is harvested, 40% of the mixture is used for 25% to 3,000 grams plus 74.7% before the corn is planted. The farmers are 600-900 grams, 450 liters of water, the height of the nozzle should be higher than 30F of weeds, and spray evenly.
4. Plastic film covering corn field
In the spring and corn areas with low temperature and drought, there are often mulching techniques to increase the temperature and temperature of the mulch to promote the emergence of corn. Because of the high temperature inside the mulch, the temperature is very beneficial to the efficacy of herbicides. Therefore, compared with the application of the open field, the lower herbicide dosage (usually 1/4 to 1/2 less than the conventional dosage) can achieve good herbicidal effect, 40% ethyl hydrazine per minute. Suspension emulsion 1800 ~ 2250 ml, or 50% acetochlor EC 750 ~ 1050 ml, or 72% Duer EC 900 ~ 1200 ml, 90% Wones EC 80 ~ 750 ml, or 48% cable emulsifier 2250 ml, Or 33% weeding emulsified milk 1500 ~ 2250 ml, after the corn seeding suppression, add 450 ~ 750 liters of water, spray evenly, and then cover the membrane. If it is a seedling application, the dosage should be calculated based on the actual drug area.
5. Wheat straw cornfield
The wheat and corn interplanting cultivation in North China is to sow the corn on the stalks of the wheat field in the middle and late May, and calculate the dosage according to the corn planting area (ie, the actual application area) before sowing, and spray the soil surface after the wheat harvest. Rotary tillage and cockroach, remove the residual weeds in the wheat field, and then apply the medicine according to the actual spraying area. In order to improve labor efficiency, corn can be used for sowing without applying medicine. After the wheat is harvested (the corn has emerged), the soil is treated with a herbicide, such as 40% acetaminophen. Suspending agent, E-bucket mix and 50% Hebao emulsifiable concentrate.
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