Matters needing attention in raising vegetable seedlings after autumn

First, cover the sunshade net during the day, and pay attention to strengthen ventilation. It is still necessary to cover the sunshade net on the roof at noon on a sunny day to prevent the seedlings from being burned by strong light. At the same time, pay attention to strengthen ventilation, control the temperature in the shed, and strictly prevent the harm of high temperature. In general, the temperature in the greenhouse during the seedling period of eggplant and fruit vegetables should be controlled at about 30 ℃, and that of melons in the shed should be controlled at 32 ℃ during the daytime. When the temperature in the shed exceeds 35 ℃, ventilation should be strengthened.

Second, the greenhouse should pay attention to heat preservation at night to prevent seedlings from being damaged by low temperature. Pay attention to close the vents of the greenhouse in the evening to prevent the seedlings from being attacked by cold wind at night and grow poorly. The temperature in the greenhouse of eggplant and fruit vegetables should be controlled at 16 ℃ at night, and the temperature in the greenhouse of melon vegetables should be controlled at 12: 18 ℃ at night. Below this standard, heat preservation measures should be taken in time.

Third, pay attention to strengthening management on cloudy and rainy days.

1. In cloudy and rainy days, the vegetables in the seedling stage should be ventilated, watering and spraying should be avoided as far as possible, and dust should be selected when medication is used, so as not to increase the humidity in the shed and induce diseases.

2. Keep enough light in the shed.

3. After a long period of cloudy and sunny days, sunshade nets should be used in time to prevent vegetables from "flashing seedlings".

4. When it rains, the vents on the top of the strict shed should be closed to prevent Rain Water from entering and causing vegetables to be infected with diseases.

Fourth, pay attention to the management of seedling stage. After emergence, the seedlings were homogenized for 1 or 2 times, and the diseased seedlings and weak seedlings were removed, so that the seedlings would not be crowded and overgrown. Watering at seedling stage should not be too much to keep the soil moist. Autumn watering should be carried out in the morning and evening when the soil is cool.

Fifth, strengthen the prevention and control of diseases and insect pests at the seedling stage. There are many diseases and insect pests in seedling raising in autumn, so attention should be paid to spraying control. Prevention and control of diseases at seedling stage: quenching disease and blight can be controlled by spraying Heguoli (12.5% uniconazole) 16 grams per mu to 30 kg of water; Botrytis cinerea can be prevented from seedling stage, and chlorothalonil, alum and Sukeling can be used to control. Pest control at seedling stage: imidacloprid can be used to prevent aphids; mole cricket, an underground pest, can be poisoned with bait mixed with pesticides.