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Control methods:
1. Strengthen agricultural control, clean gardens, weeding and weed control, and control bacterial sources; remove old leaves and diseased leaves to reduce re-infestation of pathogens; reduce field moisture; increase application of phosphorus and potassium fertilizers, strengthen field management, and increase plant disease resistance.
2, 50% carbendazim or 50% eutectic WP 500-800 times mu, or 15% wolfberry fruit 600 times evenly spray, control should be sprayed once every 7-10 days, even Spray 2-3 times, can effectively control three diseases.
Prevent and treat corn diseases is an urgent task
The main diseases that occur on corn at present are corn leaf spot, small class disease, and sheath blight. These three diseases mainly damage the leaves, and sometimes also damage the leaf sheath, temporal lobe and ear. In severe cases, the lesions merge, the leaves die, and the yield is generally reduced. 15-20%, severe cases more than 50%, or even no income. Since the middle of July, the county has shed heavy rains and sustained high temperatures, which is conducive to the occurrence and development of corn diseases. According to county plant protection stations in the townships of Enter, Xiping, Chongyang and Erlangping recently, the diseased field rate was 30%, the average diseased plant rate was 12%, and the diseased leaf rate was 8%; the highest diseased plant rate was 100%, and the diseased leaf rate reached 52%. In the survey, it was found that late summer sowing of the corn field was heavy, especially the poor varieties with planting resistance, partial N fertilization, excessive close planting, and extensively managed plots. It is hoped that the peasants will attach great importance to it and carry out prevention immediately