Symptoms and control measures of leek disease in sunlight greenhouse

First, the onset of symptoms: all parts of the leeks can be diseased, with pseudostems and bulbs most affected. The leaves and calyx mostly become infected from the lower part. At the beginning, it was a dark green water-stained lesion. When the lesion spreads to the leaves and calyx, the diseased part collapses, causing it to turn yellow, sagging, and soft rot. When the humidity is high, the disease minister produces a layer of mildly sparse white mold. The bulbs were damaged, the roots were water-stained, light brown to dark brown, growth was inhibited and nutrient storage was affected. The roots were rotted brown and the root hairs were reduced. The plants stopped growing and died.

Second, prevention and control measures

1. Variety selection Choose disease resistant varieties suitable for local planting.

2, field management to fully apply the organic fertilizer, rational dense planting, improve ventilation and light conditions. Appropriate irrigation, ventilation after the water, reduce the humidity in the field, reduce the dew condensation, prevent the indoor appearance of high temperature and humidity conditions. After harvesting the leeks, the diseased leaves and debris are promptly removed.

3, the early stage of the use of chemical agents to prevent the onset of the use of 25% metalaxyl WP 400-500 times; or 58% of methothex MnZn wettable powder 400-500 times; 64% of the bad cream MnZn WP 400- 500 times liquid, 40% triethylphosphonate wettable powder 250 times spray control, every 7-10 days, continuous use 2-3 times.

Hospital Bed

SHANGHAI ROCATTI BIOTECHNOLOGY Co., Ltd is a leading exporter and supplier of medical equipment in China. We are not only manufacturer of medical equipment but also we are professional on providing one-stop solution of hospital project, clinic project, Education University, laboratory, government tender as well as distributors. With more than 10 years of experience, our products have been exported to more than 100 countries and have obtained good reputations because of our competitive price, high quality products and excellent service.

Hospital Bed,Hospital Bed Automatic,Abs Hospital Bed,Manual Hospital Bed With Wheels

Shanghai Rocatti Biotechnology Co.,Ltd , https://www.ljdmedicals.com