Cultivating strong seedlings is the key to managing good melons and vegetables. In particular, the melons and vegetables that rushed to change in the winter were generally poor in their overall performance after planting. One of the important reasons was that the seedlings were not robust. In winter, the temperature is low and the light is weak. The growth and development of the seedlings are greatly affected, and more diseases appear. The occurrence of disease at the seedling stage is mainly divided into three stages, and this is the focus. The prevention effect is better in advance.
Sowing stage. Before sowing, a sterile nursery substrate or sterilized nursery soil can be selected to reduce pathogens in the substrate. Appropriate amount of fertilizer can be properly added when preparing seedbed soil. These fertilizers not only provide rapid and long-lasting supply of seedlings, but also improve the physical properties of the bed soil, thus laying the foundation for the development of strong seedlings. The nursery soil should also pay attention to the first disinfection, can be 3-5 days in advance, with 30% seedlings enemy 10 grams per square meter of the amount of sterilization of seedling soil treatment, you can reduce the incidence of seedling disease.
Grafting phase. Grafting will form large wounds on the seedlings, providing opportunities for the spread of pathogenic bacteria. If cloudy weather occurs after grafting, low temperatures, weak light, and high humidity, it is likely to cause disease epidemics. Therefore, before grafting, it is necessary to timely disinfect rootstock, scion, and grafting tools, and watch the weather forecast. It is better to sunny weather after grafting. 2-3 days prior to grafting, use 75% chlorothalonil wettable powder 800 times, add 72% agricultural streptomycin 4,000 times, or 47% Garnett WP 800 times.
Colonization stage. When planting, it is inevitable to injure the roots and injure the leaves, and it is easy to cause various diseases. Therefore, 50% carbendazim plus 50% DT each 1 kg for mu when planting, and 1:100 for mixing soil in the soil, and planting water at the same time, but remember to flood irrigation, can kill or inhibit pathogens The role of reducing disease occurrences.
Face Mask,Anti Dust Face Mask,Non Medical Face Mask,Epidemic Prevention Products
YIWU CHUANGCHENG IMPORT&EXPORT CO.,LTD , https://www.tradingsix.com