As the saying goes, “seven-point seedlings and three-in-ones†can be seen in the importance of cultivating seedlings for vegetable production. Good seedlings cannot carry pests. At the moment when the vegetables are growing early in spring, attention should be paid to the selection of varieties, seed treatment, and preparation of nutritious soil in order to produce healthy and disease-free seedlings.
Variety selection For diseases and insect pests that are seriously endangered in the early spring in this area, we should choose the pest-resistant varieties reasonably, and we must choose varieties that are resistant to low temperature and good precociousness.
Seed treatment to prevent seed-borne virus disease, it is recommended to use 10% trisodium phosphate solution or 0.2% potassium permanganate solution or 2% sodium hydroxide solution soaking for 30 minutes, remove and wash with water, then soak germination; with 50 % Carbendazim 500 times solution soaked melon vegetable seeds for 60 minutes to prevent fusarium wilt.
The disinfection of the greenhouse includes surface disinfection of the greenhouse and soil disinfection of the seedbed. 1. The surface of the greenhouse can be disinfected with horseradish fumigant, ozone, sulfur or compound fumigation with 20% Pythium chlorothalonil and 20% isoprovan. 2. Soil disinfection of seedbed can be driped with 20% horseradishine water emulsion, or even after the whole crop is fertilized and watered, the seedbed can be evenly sprayed with 30% hymeximide WP or 600 times 50% carbendazim wettable powder 800 times. . Can also be used to cultivate seedlings, with 50% carbendazim or 30% hymexazide wettable powder 8g per square meter, mixed with the appropriate amount of fine soil, using conventional Yangshuo seedlings to take good medicine soil 1/ 3 Sprinkle on the surface of the bed or in the sowing ditch, and then sprinkle the remaining 2/3 of the medicine on the seeds that have already been sown. The effect is better, but the surface of the bed should be kept moist to prevent phytotoxicity.
Nutrient soil preparation Seedling soil selection of sorghum garden soil and decomposed organic fertilizer, according to the ratio of 7:3 mix, add 0.5-1 kg of compound fertilizer per cubic meter. Use well-developed organic fertilizer as base fertilizer to avoid pathogenic bacteria in the excrement or damage from burning seedlings.
The pest monitoring and prevention seedling shed must cover more than 40 mesh insecticidal nets to prevent the introduction of small pests such as whitefly and aphids; hang yellow boards to monitor the occurrence of small pests and can play a role in trapping; spraying seaweed, plants Immune protein and other inducers, promote plant growth and enhance seedling disease resistance.
Pre-shelf pesticide prevention To ensure that the seedlings are free from pests and diseases, the roots or seedbeds are irrigated with Pythium oligospirillum, Bacillus subtilis, and Trichoderma spp. before transplanting to prevent soil-borne diseases and enhance their resistance to pests and diseases; Use a broad spectrum of bactericidal and insecticidal agents for a detailed spray prevention.
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