At present, corn has grown to the middle and late stages. In order to ensure the production, it is necessary to strengthen the prevention and control of pests and diseases. At the end of August, it was the peak period of various pests and diseases. Serious occurrence of corn spot disease, small spot disease, bacterial wilt, brown spot disease, sheath blight, etc., seedling blight, rough disease, rust also occur in some areas, which has caused a lot of corn production. influences. The main prevention measures are:
Promote disease-resistant varieties and use modern high-tech to cultivate multi-resistance varieties and improve the coverage of improved varieties.
The seed treatment is coated with a suitable time, a lychee, a corn seed coating agent, etc. to kill the pathogenic bacteria carried by the seed and prevent seedling diseases.
Rotating and non-grass crop rotations to reduce the accumulation of pathogens.
Strengthen field management, apply more decomposed farmyard manure, increase the application of phosphorus, potassium fertilizer and micro-fertilizer; rationally close planting, timely tillage and drainage, and create an environment conducive to corn growth and not conducive to disease occurrence.
Clean the garden and remove the diseased leaves at the bottom. After the harvest, the sick bodies will be taken out of the field for destruction, reducing the source of the disease.
When the seedling period of scientific use is rainy, carbendazim and heguoli should be sprayed early to prevent seed blight and sheath blight; in the dry year, timely spraying of sputum, Dagongchen, etc. to control aphids, Laodelphax, etc. In the early stage of the occurrence of rough disease, dwarf mosaic disease, etc., the virus is sprayed with virus A, OS-Sterling, and bacterium. In the field where rust and sheath blight occur, we control it with Heguoli and Rustin.
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