The summer and autumn seasons are hot and rainy, and the occurrence of pests and diseases is heavier, which brings great difficulties to the nursery work. According to many years of practice, the author believes that the following technical points must be mastered in the summer and autumn seasons.
First, choose a variety with strong resistance
For example, if tomato is cultivated as an autumn delay, it is best to use Zhongza No. 9. The variety has been tested and demonstrated by the Feicheng Agricultural High-tech Demonstration Park. Its antiviral disease ability is obviously superior to other varieties, and it is most suitable for delayed cultivation of the ball, and the yield and quality are excellent.
Second, do a good job before seeding
In order to eliminate some of the surface of the seed, you can use the warm soup soaking method, that is, put the vegetable seeds into the water at 55 °C for 10-15min (minutes), and continue to stir until the water temperature naturally drops to about 30 °C, then soak the seeds, 40% Ermalin 100 times liquid soaking for 15-20min or potassium permanganate 100 times soaking for 10-15min, after the fish is removed, rinse the residual liquid on the surface of the seed with water. Chemical dressing refers to dry mixing, commonly used carbendazim, chlorothalonil, etc., the dosage is 0.1%-0.2% of the seed amount. In order to achieve the effect of both sterilization and soaking, the soaking of the liquid can be combined with the soaking of the warm soup. That is, the liquid is rinsed after soaking the seeds, and directly poured into warm water to soak seeds. Soaking time tomato is 6-8h (hours), eggplant 10-12h, pepper 8-10h. After soaking seeds, it is generally no longer germinated, and it can be directly planted with fine sand.
Third, rational allocation of nutrient soil
For the preparation of nutrient soil, it is advisable to choose 6 parts of cleaned field soil, 4 parts of decomposed high-quality ring fertilizer, mix and sieve, and mix 50% carbendazim 60-80g per cubic meter of soil, 500-1000g of nitrogen, phosphorus and potassium compound fertilizer. 20g of phoxim, fully mixed and covered with plastic (10825, 5.00, 0.05%) film, piled up for 10-15 days in the sun, fully sterilized.
Fourth, the use of sorghum sand net seedlings
In order to facilitate timely drainage in summer, it is advisable to use a sorghum seedbed and digging the drainage ditch around. The seedbed is covered with an arch shed, and an insect net is placed around the shed. The shed is covered with a shade net or straw to cool down. This method should be used regardless of the seedbed or the seedbed.
V. Reasonable chemical control
Due to the high temperature and humidity in summer, the seedlings are very easy to grow, especially the tomato seconds are more prone. In order to cultivate strong seedlings, 20×10-6 (20ppm) paclobutrazol or 10×10-6 uniconazole or 100×10-6 auxin can be sprayed when the seedling grows to 2-3 true leaves. When you grow to 5-8 true leaves, you can spray 200×10-6 to help you.
6. Promptly control pests and diseases
Insect pests are mainly to prevent mites, whitefly, sassafras, scorpion scorpion, and medicinal agents, such as sputum, great hero, cypermethrin, broom sputum, Tianli 2, zebra spirit, etc. Mainly, the blight is mainly used, and it can be sprayed with a spray of seedlings, Pulk, etc. or sprayed with a green hen 2. The pest control and disease prevention agents can be mixed and administered once every 7-10 days.
7. Reasonable foliar topdressing
From the seedlings 3-4 pieces of true leaves, you can use the photosynthetic micro-fertilizer, 0.2%-0.3% potassium dihydrogen phosphate, etc. for foliar topdressing, strictly control the concentration, preferably sprayed around 5:00 pm, within 3 hours after spraying The rain needs to be re-sprayed.
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