According to the researcher of the Provincial Vegetable Research Institute, Zheng Mingfu, the recent continuous low temperature, rain, and sunshine conditions have caused great impact on vegetable seedlings. The main hazards are as follows: First, low temperature and rainy weather cause bad shoots, especially high-protein seeds such as soybeans and green soybeans. Such as more obvious. The second is that large humidity causes the soil to lack oxygen, resulting in rot or death of the seedlings. The third is to cause the photosynthesis of the foliage to be blocked, weakened or even stopped, and the seedlings are seriously deficient in nutrition. The fourth is to induce some diseases, such as gray mold, damping-off disease, blight and so on.
Zheng Mingfu proposed seven emergency measures to remedy the loss of vegetable seedlings caused by disaster weather:
1. After the weather turned green, the seedlings for the rotten seedlings were replanted. When sowing, it must be soaked with warm soup, disinfected with liquid medicine, and germination to catch the season.
2. The seedlings are covered with small sheds for later insulation and sheltering. When the weather is fine, the greenhouse membrane is ventilated and drained.
3. Drain the drains around the greenhouses to reduce the groundwater level, so that the rain will stay dry and prevent the occurrence of diseases.
4. Relax in time after clearing to ensure soil ventilation and promote seedling growth.
5, in time to clean up the seedlings of the diseased plants, pull out and burn.
6. For lean and undead seedlings, spray foliar nutrients after clearing, such as 0.2% potassium dihydrogen phosphate, plant power 2003 and so on.
7, disease prevention and control. Gray mold can be used 50% fast-king, 50% acetaminophen, 65% methoxamine, etc., and concurrent treatment of sclerotinia. In addition to doing a good job of seed dressing disinfection and seed treatment, the damping-off disease should reduce the humidity during onset, and can spread some ash, dry yellow soil, etc., and chemical control can be used 25% thiram, 75% chlorothalonil, 60% antivirus, 5 %Lingling, 77% can kill control, can also be controlled by copper amine mixture, add 1 kg of copper sulphate plus 5.5 kg of ammonium carbonate, mix and seal for 24 hours, spraying 1 kg of liquid to 400 kg of water. Bacterial damping-off methods are basically the same with damping-off, but Rhizoctonia is not very effective against damp blight and can be controlled by carbendazim or thiophanate. Use the powder as much as possible and do not use water.
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