Errors and Prevention of Herbicide Application to Watermelon

In order to reduce and prevent mistakes in the application of chemical herbicides to watermelons, attention should be paid to the following issues in application technology. First, the correct choice of herbicides. There are many varieties of herbicides available for watermelon production, the most commonly used are 48% trifluralin EC, 25% weeding WP, 33% weeding EC, 48% diterpene EC, 12.5% ​​GENUINE EC, 15 % Stable to kill EC, 15% EC to kill EC, 48% EC, 10% EC to EC. Second, strictly control the dose. 48% trifluralin dosage 75-125 ml/mu, 25% herbicidal ether 100-150 g/mu, 33% weeding 80-130 ml/mu, 48% tetrazolamine 200 ml/mu, 12.5% ​​cover grass Able to 65-150 ml per acre, 15% stable to kill 75-130 ml per mu, 15% fine steady kill 50-60 ml per mu, 48% pull rope 150-200 ml per acre, 10% alum grass grams per Mu 65-100 ml. 40-50 kilograms of clear water were sprayed on the surface of the soil before transplanting. Among them, trifluralin is easy to decompose after seeing sunlight, and after spraying, the gingivae is used to evenly spread the medicine and soil, and the depth is up to 5 cm, so that the efficacy can be fully exerted. Third, due to the flexible application of time. The effect of applying herbicide on watermelon has a great relationship with the ecological environment. For example, the application of herbicides to sandy loam is quicker than clay, but the viscous soil is safe after application, and the concentration of sandy loam is likely to cause phytotoxicity. It is necessary to accurately grasp the amount of medication due to differences in soil. When the temperature is above 20°C, the effect of killing grass is better. When the temperature is not high in spring and autumn, the dosage should be increased appropriately, and in summer when the high temperature is high, the dosage should be reduced as appropriate. When the soil moisture is good, the grass-killing efficiency is high. When the moisture level is poor, the grass-killing effect is reduced. The drug should be selected when the moisture is good.

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