Spring tomato breeding technology
Seedlings play a very key role in the growth period of tomatoes. “Miao Miao 30% income†is good for seedling cultivation. It not only has fewer pests and diseases but also has high yield. However, some vegetable farmers do not pay attention to nursery disinfection when raising seedlings, and the temperature of the humidity is not well controlled, causing tomato seedlings to be more diseased and disease-prone, which may affect flower bud differentiation and cause more malformed flowers and fruits. To cultivate good seedlings, the following points should be noted:
1. Time for raising seedlings: Seedlings are generally sown in late December and early January (in the south central area of ​​Yunnan).
2. Seed Disinfection: Generally 30-50 grams per mu. Sowing before sowing 2 days to increase the germination rate. Heat the seeds with warm water of 55°C for 15 minutes, keep the temperature in one direction, and add cold water to 35°C for 6-8 hours. In order to prevent the occurrence of virus disease, it can be soaked with 10% trisodium phosphate solution for 40-50 minutes, and then rinse the water with the clean seed coat mucus, drain the water, and dry it to sow.
3. Seedbed establishment: Each acre needs a seedbed of 10 square meters, applies 100 kg of fully-fertilized organic fertilizer, 500 g of heroin, and can kill 100 g of 100 g. Scatter evenly and pour over 12 centimeters. Level the seedbed and pour water. Disinfection of seedbed soil with Suzhining (58% Methanochrome manganese) or Xiduosheng (70% Prosin Zinc) and 70% Xingonxue (Methyl Thiophanate) 1:1 mixture, 10 grams per square meter Mix well with 5 kg of sieved fine soil. When sowing, 2/3 of the nutritious soil will be leveled on the seedbed, do the padding, then sow the seeds evenly. After sowing, cover 1/3 of the soil and cover the thickness 0.8 to 1 cm. To promote early unearthing, cover the seedbed with plastic film and maintain the temperature at about 30°C during the daytime. The maximum temperature is 32°C. When 1/3 of the seedlings are unearthed, the plastic film is removed. After the seedlings are established, the temperature is lowered to about 25°C to prevent leggy growth. . After the seedlings are used, Yibao (68.75% oxazoxanthone. Manganese zinc) 10g or Xiduo (70% Procinon) 30g plus lavulol (72.2% propamocarb hydrochloride) 20ml water 15kg Repeatedly spraying seedlings to prevent seedling blight, damping-off, and early blight.
4 points seedlings: seedlings grow to two leaves when the heart is a crucial period. Prepare nutrients in advance with 1 cubic meter of nutritious soil in Daejeon topsoil (remove 5 cm of surface soil to avoid herbicide residues) 60%, 40% of organic fertilizer, 10 kg of marine bio-fertilizer, and 70% of Bison Zinc) 90 grams, 500 grams of courage, fully stir evenly. The tomato seedlings were rooted with 1000 times sea spirits before seedlings. The temperature within 3 days after seedling was managed to 28°C to 30°C, and the seedling temperature was controlled to 22°C to 25°C. Pay attention to spraying 750-fold liquid-free dew (72.2% of promecarb hydrochloride) to prevent devastating disease before spraying. After easing the seedlings, irrigate the roots with 500 times solution of Yong Zhuang + 500 times solution of Teyou root. Blight also stimulates more rooting of tomato seedlings.
5. To promote flower bud differentiation: Tomato flower bud differentiation is from the third true leaf, to the end of the ninth true leaf, basically to the seventh true leaf, the first three panicles have been divided. If flower buds do not differentiate well, there will be malformed flowers and malformed fruit in later stages. Therefore, the differentiation of flower buds at seedling stage will directly determine the yield in the early stage. To promote flower bud differentiation, 25 grams of flower and fruit are sprayed on 3 to 5 true leaves. 8 grams can promote flower bud differentiation.
6. Diseases and Insect Pests at Seedling Stage: Pest control focuses on whitefly, aphid, and spotted fly, with 50% of 70% imidacloprid plus 40% of Wanling 10g to spray 15 kg of water. The main diseases in the seedling stage are virus disease and stalk rot. To prevent viral diseases in 3 to 4 true leaves, use 4% ningnanmycin 25 ml + Kangpu zinc 4 ml + dragon light multi-boron 15 ml + sea spirit 8 grams of honey + 100 ml of water spray 15 kg; prevention of stem rot can be used 2 days before planting with a net fast (52.5% fluconazolone cream cymoxan) 9 grams + can kill thousands of 10 grams + sea Elf 8 grams of water spray 15 kg seedbed.
7. Standard for planting seedlings: The seedling age is about 90 days, the main stems are purple and green, and the flower buds are 70%, the stem diameter is 0.6 cm, and the root system is well developed without pests and diseases.
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