1. Comprehensive prevention and control of seedling diseases The seedbed should be selected from the sheltered area in the sheltered sun. It can be directly sterilized by carbendazim on the seedbed to reduce the occurrence of blight and reduce the spread of blight.
Cotton seed bacterium is one of the main sources of seedling disease. Therefore, killing the pathogens is an important measure to control cotton seedling disease. It can be incubated for 2-3 days before sowing, or the finished cotton seed coated with a seed coating agent, or seeded with carbendazim, or soaked with methyl chlorpyrifos for 5 to 6 hours.
After the seedlings, the earliest occurrences were blight and anthracnose, combined with carbendazim, or polymanganese zinc, or methyl chlorpyrifos. The disease of the leaf is carbendazim and methyl chlorpyrifos. The whole seedling period is controlled 2 to 3 times.
2. Comprehensive prevention and control of pests and diseases in the early stage of cotton breeding. Combination of prevention and treatment to alleviate the degree of damage caused by blight. In the diseased fields where the susceptible varieties are still planted, comprehensive prevention and control measures should be taken to reduce the degree of damage. First, deep digging the three ditch to prevent waterlogging; second, applying pesticide irrigation when transplanting on the basis of disease-free soil seedlings. Rooting water, nutrient é’µ transplanted with carbendazim plus urea on the day or the next day; the third is to attack the diseased cotton plants to promote the use of ammonium bicarbonate. Pest control agents such as cotton aphid, red spider, cockroach, red bollworm, and cotton bollworm have been recommended above, and are not recommended here.
3. Comprehensive control of pests and diseases in flowering and bolling period After cotton entered August, its self-compensation ability was significantly weakened, and the types of pests and diseases were also significantly different from those in the previous period. The control ability of natural enemies in cotton fields to reduce pests was weakened. At this time, the main pests in the cotton field, the red bollworm and the cotton bollworm directly harm the harvested part of the cotton. If the control is slightly wrong, the cotton can be seriously reduced. A few years of rain in the autumn, when the blind cockroaches do not apply in the field, it can cause cotton to be rejected. Therefore, the prevention and control of cotton pests and diseases in this period must be based on chemical control. It should be based on the control of cotton bollworm and Spodoptera litura, and treat other pests. For bell disease, it is mainly based on agricultural control, supplemented by chemical control. Red spider, Spodoptera litura, and blind mites have been recommended above, and are not recommended here.
Long Measuring Tape,Long Tape Measure,Long Fiberglass Measure Tape,Long Steel Measuring Tape Tape Measure
Shangqiu Yuan Xiang Measure Tools Co., Ltd. , https://www.yuanxiangtool.com