Vegetable field herbicide application technology
Vegetable field herbicide application technology:
1 Reasonable selection of herbicides The following herbicides are safe and low-toxic for vegetables.
(1) 48% trifluralin emulsifiable concentrate 100-150ml/667m2. Suitable for Chinese cabbage, Chinese cabbage, celery, radish, carrot, kidney bean, cowpea, soil treatment before planting. Tomato, pepper, eggplant, kale, broccoli, soil treatment before planting.
(2) 50% chlorpyrifos WP 200-250g/667m2 is used for soil treatment before celery, old root leeks, carrots and alfalfa.
(3) 33% Shitian emulsifiable concentrate 100-150ml/667m2, suitable for soil treatment before bean, potato, pea, straight leeks, cruciferous vegetables and before planting of Solanaceae vegetables.
(4) 20% dichlorpyrifos EC 250-300ml/667m2, suitable for soil treatment before radish, cabbage, kidney bean sowing and eggplant, tomato, pepper, cabbage, potato, watermelon.
2 improve the quality of pesticides
(1) Master the amount of medication. It is necessary to achieve "two accurate", that is, the field area is accurate and the calculated dose is accurate. In the field with high organic matter content, the microorganisms can separate the herbicide, and in addition, the clay has an adsorption effect on the herbicide. Therefore, the dosage of such fields should be appropriately increased. Conversely, the dosage of the thin field and sandy soil should be reduced as appropriate.
(2) Master the time of medication. Trifluralin, dichlorfen, herbicide ether, chlorpyrifos and shitianbu are all soil treatment agents, which are mainly absorbed by the roots and shoots of weeds to inhibit the growth of weeds. It is usually applied after emergence or planting after crop sowing. Jinghecao is a stem and leaf treatment agent, which is destroyed by the stems and leaves of weeds and destroyed into the body of the plant. The time of application should be in the 3-6 leaf stage of grass weeds.
(3) The soil treatment agent must be sprayed after rain or after watering. After spraying Fluorine, it is necessary to mix 2-3cm deep in time to prevent photolysis. Other types of herbicides generally need to protect the soil membrane, avoid mixing soil and trample.
(4) Master the amount of water used in medicine. The pharmacy should be sprayed with water 25-30kg/667m2, and it must be evenly sprayed. The sprayer used must be free from running, dripping, dripping and leaking.
(5) When using herbicides in solar greenhouses and greenhouses, attention should be paid to ventilation and ventilation at high temperatures to avoid the occurrence of harmful effects.
(6) Cucumber, lettuce, and Artemisia scoparia are sensitive to herbicides such as trifluralin and chlorpyrifos. Celery and carrot are sensitive to dichlorfen, and they are also sensitive to fields where these herbicides have been used. Avoid using and picking up.
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More info about PCR Tubes:
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