What herbicide works well for weed control in watermelon fields

During the planting process, watermelon fields are prone to weeds, and watermelon is extremely sensitive to herbicides. Improper use can reduce watermelon quality. So, what herbicide should be used for weed control in watermelon fields?

1. What herbicide should be used for weed control in watermelon fields?

After watermelon sowing and before emergence, herbicides such as 25% amiprophos emulsifiable concentrate, or 80% simazine wettable powder, or 50% napropamide wettable powder can be used. 2-3 days before transplanting watermelon seedlings, herbicides such as 48% trifluralin emulsifiable concentrate, or 48% butralin emulsifiable concentrate, or 50% metolachlor emulsifiable concentrate can be used. After watermelon transplanting and before weed emergence, herbicides such as 48% trifluralin emulsifiable concentrate, or 33% pendimethalin emulsifiable concentrate can be used. During the watermelon growth period, 35% fluazifop-P-butyl emulsifiable concentrate, or 20% sethoxydim emulsifiable concentrate, or 12.5% haloxyfop-methyl emulsifiable concentrate can be used.

2. What are the precautions for weed control in watermelon fields?

1. Correctly choose herbicides

There are many herbicide varieties available for watermelon production. The most commonly used include 48% trifluralin emulsifiable concentrate, 25% nitrofen wettable powder, 33% pendimethalin emulsifiable concentrate, 48% butralin emulsifiable concentrate, 12.5% haloxyfop-methyl emulsifiable concentrate, 15% fluazifop-P-butyl emulsifiable concentrate, 15% refined fluazifop-P-butyl emulsifiable concentrate, 48% alachlor emulsifiable concentrate, 10% quizalofop-P-ethyl emulsifiable concentrate, etc.

2. Strictly control the application dosage

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-methyl at 65-150 milliliters per mu, 15% fluazifop-P-butyl at 75-130 milliliters per mu, 15% refined fluazifop-P-butyl at 50-60 milliliters per mu, 48% alachlor at 150-200 milliliters per mu, and 10% quizalofop-P-ethyl at 65-100 milliliters per mu. Dilute each with 40-50 kilograms of clean water and spray on the soil surface before watermelon transplanting. Among these, trifluralin easily decomposes when exposed to sunlight, so after spraying, a toothed rake should be used to rake the treated soil evenly to a depth of 5 cm, so that the efficacy can be fully exerted.

3. Apply flexibly according to the site and time

The effect of applying herbicides to watermelon is greatly related to the ecological environment. For example, herbicides applied to sandy loam soil take effect faster than on clay, but clay soil is relatively safer after application, while sandy loam soil with too high a concentration is prone to cause herbicide damage. The dosage must be accurately controlled according to the soil type. 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 moisture is good.

Since watermelon is a fruit, if field weeds are not very serious, manual weeding should be used as much as possible, as it is a pollution-free method.