There are four fears in the seedling stage of tomato seedlings in summer: one is afraid of sun exposure, the second is rain, the third is high temperature, and the fourth is long. In order to cultivate strong seedlings, the following measures should be taken:
Choose a dry and ventilated vegetable garden as a seedbed, and set up a sunshade. The bed width is about 1 meter. The shade on the bed must have a layer of plastic film to prevent rain from entering. The flower curtain is covered on the film, which is both light-transmitting and shade-proof. Cover the film in the shade when it rains to prevent the seedlings from getting hot rain, and use a curtain to shade the sun at noon on a sunny hot day to prevent the seedlings from being exposed to the sun.
The seedling age should be short, generally 30 to 35 days, and seedlings should be grown at one time, without splitting seedlings, to prevent root infection and diseases caused by transplanting seedlings.
The delayed tomato in the greenhouse is raised in the hot and rainy season in summer, and various diseases are more serious. It can be controlled by spraying 1-2 times 500 times of chlorothalonil or toxin alum during the seedling period.
Control watering in the later period and prevent rain water from pouring through, causing seedlings to grow long.
To prevent the seedlings from growing too long, spray the leaves with chlormequat 0.1%-0.15% for a total of 2 sprays to make Miao Dun firm and strong.
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