Control methods: 1. Seed coating It is recommended to use corn seed coating agent containing fungicides, insecticides and trace elements for coating, and soak seeds for 1 to 2 days before sowing to remove lean, sorghum, and mildew seeds.
2. Seed dressing without seed coating, 70% thiophanate-methyl or 50% carbendazim wettable powder, 0.5 kg for 100 kg seeds, 40% methyl iso Phosphorus or 55% 3911 EC or 50% phoxim EC may be seeded at 0.3% of the seed amount (ie 50 kg of seed plus 2.5 kg of water and 150 g of pesticide). Heaps of stuffy stuff for 4 to 6 hours, air dry and sowing.
The occurrence area of ​​soybean root rot in our city continues to increase. Plant Protection Station survey: Wang Ji, Ma Qiao, Xinqiao, Liuhe and other townships have occurred to varying degrees. Root rot is a root disease caused by a mixture of various pathogenic bacteria, so the symptoms are also different, but most of the symptoms are in the seedling or adult stage. The main damaged part is the main root, and generally the lesion is brown to dark brown or auburn. Afterwards, the fusiform, long strip, and irregularly large spots quickly expanded, causing the entire main root to turn reddish-brown or dark-brown ulcers. The cortex rotted, the disease was fine, and some depressions occurred. Lateral roots and fibrous roots fall off and become bald. In general, the roots are affected. The upper part of the plant is very weak. The leaves are yellow and slender, the plants are dwarfed, the branches are few, and the heavy ones are dead. Although the light ones can continue to grow, the leaves turn yellow so that they fall off earlier and there are fewer scars. Small, low yield.
Soybean root rot pathogens are mostly soil habitual bacteria. It is suggested that soil treatment and pesticide seed dressing should be performed in a “two-pronged approach†to kill pathogens in the soil and postpone the infestation period. Can choose to use lysergizumab, thiram, and insecticide as the main ingredient of the compound; can also be used 2% bacteriocin grams (Ningnanmycin) agent in accordance with the seed amount of 1% or middle and late foliar spray.
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