Chemical weeding techniques in Rice Seedling Field

Many rice seedling fields have many kinds of weeds, high density and serious harm, which has become one of the main obstacles to the cultivation of strong seedlings and good harvest of autumn grain. The main techniques for weed control in the seedling field are as follows: first, dry nursery seedling field, one of the following three formulations should be adopted: 1, 36% Shuihanling EC 150 ml per mu; 2, 60% butachlor EC 75-100 ml per mu; 3. 30% seedling field net or 30 to 40 grams of rice seedling net wettable powder per mu. Formula 1 and 2 should be sprayed evenly with 40 to 50 kg of water before mulching the soil on the rice seedling bed, while formula 3 should be sprayed evenly with 30 to 40 kg of water from the two-leaf stage to the four-leaf stage (no pesticide can be applied before the second leaf). In addition, the harm of mole cricket earthworms and other underground pests in dry nursery fields is more serious. 5% phorate 2.5 kg or 3% furan granules 2 kg per mu, and 30 to 40 kg of fine soil can be used to effectively control underground pests. 2. One of the following four formulations should be adopted in the field of water-raised seedlings. 1. 30 to 40 grams of 50% fast killing paspalum, god hoe or barnyard king wettable powder per mu; 2, 30 to 40 grams of 30 to 40 grams of pure or pure wettable powder in 30% seedling field per mu; 3. 30 to 40 grams of 25% dichlorobenzyl (rice nongle) suspension emulsion per mu. 4. 60% butachlor EC 60 to 70 ml per mu. The formula 1 to 3 should be evenly sprayed with 25 to 30 kg of water at the seedling stage of 2 to 3 leaves, drain the field water before spraying, rehydrate 2 to 5 cm in 1 to 2 days after spraying, and keep it for 5 to 7 days a year. Formula 4 was mixed with fine soil at the seedling stage from 1 to 1.5 leaves.