How to use isoproturon herbicide

Isoproturon can control annual weeds, such as crabgrass, Chenopodium album, Kentucky bluegrass and barley grass. Suitable for weeding some vegetable fields such as tomatoes, potatoes, leeks, sweet (spicy) peppers, eggplant, broad beans, peas, onions, etc.

(1) Seedling leek, direct seeding onion, seed-collecting onion, potato and other vegetable weeds. After sowing, 250g of 20% wettable powder was sprayed on the soil surface per mu, and the soil was treated with water.

(2) After tomatoes, sweet (hot) peppers and other transplanted fields survive, spray 200 grams of 20% wettable powder per mu.

Matters needing attention in the use of isoproturon herbicide

First, take medicine early to avoid cold current.

In recent years, the area of direct seeding rice is large, which makes stubble stay late. Sowing begins and ends at 1 1, and it is easy to encounter cold current when weeds are in full bloom. 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 function.

This year, some wheat fields still have freezing damage after using isoproturon 10 days, but the current weather forecast can only be reported for 7 days. Therefore, only large-scale early use of isoproturon can ensure safety. Generally, the use of isoproturon is controlled to end on165438+1October 20, and it will not be used again.

Second, control the dosage.

At present, ordinary farmers are always used to increasing the dosage of herbicides to improve the control effect. In 2008, some wheat fields with severe freezing injury aggravated the freezing injury by increasing the dosage. In fact, the key to the efficacy of isoproturon lies in humidity. Only when the humidity is reached, the drug effect can be guaranteed completely according to the recommended dosage, and the dosage can also be reduced by compounding with fenoxaprop-p-ethyl.

Third, strengthen field management and improve cold resistance.

This year's practice shows that under the same dosage of isoproturon, the freezing injury of wheat fields with shallow roots is serious, while that of wheat fields with deep roots and high humidity is slightly less. Therefore, field management can be strengthened and the cold resistance of wheat seedlings can be improved. After wheat sowing, shallow rotary tillage should be carried out to make the roots of wheat seedlings take root deeply. If the weather forecast is cold after taking the medicine, you can water and moisturize.