Prevention and cure method of rape rot

There are four main reasons for the death of rapeseed rot. The first is soil moisture, which is airtight, or the soil contains toxic substances; the second is infestation by toxins; the third is after planting; the fourth is underground pests. harm. The following six prevention and control measures can be taken: (1) To drain water under the condition of high moisture content, high soil moisture, wet land, and water inflated area. Deep cultivator can be used to dig into the scales between the rows of rapeseed, promote the evaporation of water in the field, reduce soil moisture, remove toxic substances. (b) For underground pests, combine topdressing with 40% dimethoate 20 ml per litter of defecation water. (3) Found root canal damage, 1.5-3 kg per milliliter of water can be used in the dimethoate emulsion, spraying 2-3 times successively on seedling leaves and root neck to kill adults and larvae, and to treat both aphids, cabbage caterpillars and other pests . (4) For root rot and white rust, 1:7-10 black and white ash (ie, 1 kg of quicklime, 7-10 kg of turfgrass) can be used for prevention and control. The methods are: first to loosen, then to catch ash, and then to irrigate manure and Soil protection seedlings. It is also possible to spray 100-60 kg of water on 60-75 kg of water, or use 100 grams of carbendazim to spray 15-20 kg of water on the seedling leaves. (e) Application of superphosphate or calcium magnesium phosphate fertilizer 20 kg, 15 kg of plant ash, promote root development, enhance pest resistance. (6) Diligently cultivating the soil to make the soil wet and breathable and promote the normal growth of rape seedlings.

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