How to use isoproturon herbicide

How to use isoproturon herbicide

Isoproturon can control annual weeds, such as crabgrass, pigweed, bluegrass, wheatgrass, etc. It is suitable for tomatoes, potatoes, Weeding and weeding of some vegetable fields such as seedlings of leeks, sweet (hot) peppers, eggplants, broad beans, peas, onions, etc.

(1) For weeding in vegetable fields such as seedling leeks, live-seeded onions, seed-collected onions, and potatoes, after sowing to before emergence, or before weed germination, use 250 grams of 20% wettable powder per mu, mixed with Water is sprayed on the soil surface to treat the soil.

(2) In the transplanted fields of tomatoes, sweet (hot) peppers, etc., after the transplants survive, use 200 grams of 20% wettable powder per mu, mix it with water, and spray the soil surface in a direction.

Precautions for using isoproturon herbicide

1. Use the herbicide early to avoid the cold wave

In recent years, the area of ​​direct-seeded rice has been large, which has delayed the cropping, 11 Sowing is completed at the beginning of the month, and pesticides are applied after all the weeds have appeared. It is very easy to encounter cold snaps. Isoproturon has two functions: soil sealing and stem and leaf treatment. In order to ensure its safety, it can only be used early, sacrificing its stem and leaf treatment function and relying on its soil sealing effect.

This year, some wheat fields still suffered from freezing damage after using isopropuron for 10 days during a cold wave. However, the current weather forecast can only report for 7 days. Therefore, only large-scale early application of the medicine can ensure safety, and it is generally controlled within 11 days. The use of isoproturon ended on March 20 and was no longer used thereafter.

2. Control the dosage

Nowadays, farmers are generally accustomed to increasing the dosage of herbicides to improve the control effect. In 2008, some wheat fields with severe frost damage were aggravated by increasing the dosage. . In fact, the key to the efficacy of isoproturon lies in the humidity. Only when the humidity is reached, the efficacy can be guaranteed according to the recommended dosage. It can also be used in reduced dosage by compounding it with carboxypropyl-propyl.

3. Strengthen field management and improve cold resistance

This year’s practice shows that under the same dosage of isoproturon, shallow root systems and droughty wheat fields will cause severe frost damage, while deep roots and field humidity will cause severe frost damage. Large wheat fields have slightly less frost damage. Therefore, we can strengthen field management and improve the cold resistance of wheat seedlings. After wheat is sown, shallow rotary tillage is required to make the roots of the wheat seedlings penetrate deeply downward. After using the medicine, if there is a cold snap in the weather forecast, you can moisturize it with water.