How to prevent and cure soybean sclerotinia
Soybean is a common field-type economic crop in China. Sclerotinia sclerotiorum is a common disease in soybean cultivation. Most people know that pesticides should be used for prevention and control, but many people do not know what medicine to use. Everyone introduces how to control the disease of soybean sclerotinia. Soybean sclerotinia is a disease caused by a fungus, mainly occurring in the soybean adult stage. It first appeared in the branches of the lower part of the main stem, forming water-stained lesions with irregular shape, and the lesions expanded upwards and downwards, showing a light brown or near-white color. The lesions surround the stems, causing the stems and leaves of the diseased part to dry up. The diseased plant is easy to fall. The diseased part is white cotton-like mycelium and white granular, which turns black, resembles rat feces, and is the sclerotium of the pathogen, which is easy to fall off. Longitudinal stalk, hollow, visible black cylindrical sclerotia. Under dry conditions, the diseased plants are longitudinally torn, and the vascular bundles are exposed to chaos. At the seedling stage, the base of the infected stem was browned and water-stained. When the humidity was high, the cotton-like hyphae grew out. After the disease, the dried part of the disease was yellow-brown and died. Leaf and bean pods form leaf rot and pod rot. The bacteria depend on the sclerotia for winter, which is scattered in the soil, on the sick body or mixed between the seeds. In the spring, sub-capsules and ascospores are produced under suitable environmental conditions, which become the primary source of infection in the field. Ascospores spread with wind and rain, and rainfall is a major factor in disease prevalence. Re-welcoming the 茬 or the former sunflower, the terrain is low, the density is too large or the growth is too strong, so that the soybean field in the field is severely affected. In July and August, the rainfall is heavy. To prevent and cure soybean sclerotinia, we must pay attention to: (1) Select seeds to remove sclerotia mixed between seeds. (2) The land with serious disease will be deep-turned in the autumn, and the sclerotium falling into the field will be buried deep in the soil to promote the early decay of the diseased plant residue. (3) Rotating with non-parasitic crops such as gramineous crops for more than 3 years, try not to make continuous crops with cruciferous vegetables such as sunflowers and rapeseed, as well as beans, mung beans, peanuts and carrots. (4) Choose varieties that are excellent, early maturing, and resistant to disease. (5) Foliar spray in the early stage of the disease. The available agents include 50% procymidone (Speed ​​Keling) wettable 1000 times solution, 40% sclerotium net 1000 times liquid solution, 50% methyl thiophanate 500 times solution, 40% dried WP 1200-1200 Double spray or refill once every 7 days. Car Elevator,Auto Elevator,Automobile Elevator,Car Lift Elevator Homefriend&FUJI Elevator Co.,Ltd , https://www.jfujilift.com