1, fertilizer and water management: seedlings 2-3 leaves should be applied to promote fertilizer, you can use urea (amount of 2-3 kg per acre) plus farmyard fertilizer application. In particular, the application of defecation water plus urea and potassium dihydrogen phosphate or plant ash to the frozen seedlings shall promote the growth of the seedlings, improve the quality of the seedlings, and cultivate the strong and strong. 2. Bacterial blight and bacterial wilt control can be sprayed on the seedbed evenly with 99% hymexazol 3000 times solution or 45% propionate sodium 500 times solution, and once a week afterwards, it can be controlled once. For the occurrence of blight in dry nursery, transplanting to Daejeon can be carried out earlier. 3, 3-5 days before transplanting, use 40% Chloranthathiacridin water dispersible granule 3000 times solution + 75% tricyclazole 1000 times solution or 20% Chlorantraniliprole 3000 times solution + 70% imidacloprid 5000 times Liquid +75% tricyclazole 1000 times evenly sprayed seedlings, can effectively control aphids, thrips, aphids, leafhoppers and other pests and diseases, reduce field application times and dosage. nasal swab,Flocked nasal swab for virus collection,Sterile flocked nasal swab, Medical Nasal Swab,Aseptic collection of nasal swabs Jiangsu HXRT MD Co.,Ltd , https://www.jshxrtmed.com