What are the precautions for applying herbicides to watermelon?
What should be noted when applying herbicides to watermelon? In order to reduce and prevent mistakes in applying chemical herbicides to watermelon, the following issues should be noted in application techniques. 1. Correctly select the herbicide. There are many herbicide varieties available for watermelon production, the most commonly used being 48% trifluralin emulsifiable concentrate, 25% nitrofen wettable...
What should be noted when applying herbicides to watermelon?
In order to reduce and prevent mistakes in applying chemical herbicides to watermelon, the following issues should be noted in application techniques.
1. Correctly select the herbicide. There are many herbicide varieties available for watermelon production, the most commonly used being 48% trifluralin emulsifiable concentrate, 25% nitrofen wettable powder, 33% pendimethalin emulsifiable concentrate, 48% butralin emulsifiable concentrate, 12.5% haloxyfop emulsifiable concentrate, 15% sethoxydim emulsifiable concentrate, 15% clethodim emulsifiable concentrate, 48% alachlor emulsifiable concentrate, 10% quizalofop emulsifiable concentrate, etc.
2. Strictly control the application dose. 48% trifluralin at 75-125 milliliters per mu, 25% nitrofen at 100-150 grams per mu, 33% pendimethalin at 80-130 milliliters per mu, 48% butralin at 200 milliliters per mu, 12.5% haloxyfop at 65-150 milliliters per mu, 15% sethoxydim at 75-130 milliliters per mu, 15% clethodim at 50-60 milliliters per mu, 48% alachlor at 150-200 milliliters per mu, 10% quizalofop at 65-100 milliliters per mu. Dilute each respectively with 40-50 kilograms of clean water and spray on the soil surface before watermelon transplanting. Among these, trifluralin easily decomposes after exposure to sunlight, so after spraying, a toothed rake should be used to rake the treated soil evenly to a depth of 5 cm, so as to give full play to the efficacy.
3. Apply flexibly according to soil and timing. The effect of applying herbicides to watermelon is greatly related to the ecological environment. For example, applying herbicides to sandy loam takes effect faster than to clay, but clay soil is relatively safer after application, while sandy loam with too high a concentration easily causes phytotoxicity. The dosage must be accurately controlled according to soil differences. When the temperature is above 20°C, the weed-killing effect is better; when the temperature is not high in spring and autumn, the dosage should be appropriately increased, and in summer when temperatures are high, the dosage should be reduced as appropriate. When soil moisture is good, the weed-killing efficiency is high; when moisture is poor, the weed-killing effect declines, so application should be chosen when soil moisture is good.
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