Three points of tomato spring tube

1. Temperature. The growth temperature of tomatoes is 20 to 28 ° C during the day and 12 to 16 ° C during the night. It is recommended that after the vegetable farmer pulls up the grass in the morning, the temperature starts to ventilate when the temperature exceeds 30 °C, and then the temperature of the air outlet is closed when the temperature is lower than 20 °C.

2. Pest control. In the spring, low-temperature and high-humidity diseases such as gray mold disease have been alleviated, but the temperature is slightly higher, and the diseases with less stringent humidity requirements will be aggravated, such as leaf mold, powdery mildew and root knot nematode. Then there are pests, such as whitefly, aphids, and Liriomyza sativae. For these pests and diseases, early prevention and early treatment should be achieved. For leaf mold, 60% anti-mildew (carbendazim hydrochloride) 500 times solution, 25% azoxystrobin suspension 800 times solution, 25% tebuconazole 2500 can be used. ~3000 times liquid, 25% azoxystrobin 800 times liquid and 2% spring erodemycin 300 times liquid spray control, pay attention to alternate medication, 2 to 3 times in a row.

3. Put the grass in the wolf for heat preservation. According to the insulation effect of the greenhouse, it is necessary to determine the time of putting the grass in the morning and evening. The principle is that the grass scorpion is pulled up in the morning and the temperature is 12-15 °C. If the nighttime temperature exceeds 12 °C, you can not put the grass.