Chick Virus Disease and the Prevention and Treatment of Tea Yellow Pods: Cultivation Techniques
January 10, 2008
First, understanding the differences between the two diseases is crucial. Chick virus disease primarily affects the young parts of the plant, leading to smaller, deformed leaves, brown discoloration, stunted growth, and in severe cases, leaf drop, flower fall, and fruit shedding. In the early stages, the leaf veins turn from green to yellow or brown, followed by leaf shrinkage and thickening. The leaf margins curl forward, forming a cup-like shape. In contrast, tea yellow pod disease causes overall chlorosis of the leaves, with the edges curling backward. When the virus attacks the fruit, dark green and light green spots, along with warty ridges, appear. If the root system is affected, the pedicel and stalk become grayish-brown, lose their shine, and become corky and hardened. The virus also damages the main leaf veins, causing brown or black necrosis that spreads to lateral branches, main stems, and growing points. Ocheriferous leaves may show grayish-brown or brown patches with an oily sheen on the underside.
Second, for the prevention and treatment of viral diseases, several measures can be taken. First, choose resistant varieties such as Zhongjiao No. 2, Jinjiao No. 3, Shenjiao No. 1 and No. 2, and sweet pepper No. 1. Second, disinfect seeds by soaking them in a 10% sodium phosphate solution for 20 minutes, then rinse thoroughly and germinate. Third, implement proper cultivation techniques, such as using plastic film to cover the soil, which promotes early growth and earlier harvests. Fourth, apply chemical treatments like 20% virus A wettable powder diluted 500 times, 50% bacterial clear diluted 200 times, or 200 grams of pesticide per liter of water. Spray every 10 days during the seedling stage or after planting, repeating the treatment 3–4 times for effective control.
For tea-yellow pod disease, the following steps are recommended: (1) Clear weeds and field debris, level the ground, and destroy overwintering sites to reduce insect populations. (2) Immediately apply chemical control when the disease is detected. Use 15% fluorenone EC at 300 times dilution, 34% locust ricin EC at 2000–2500 times, 48% LST at 1000 times, 1.8% Ji Insect moth, 1.8% avermectin (Zeadin, Xinke, etc.) at 3000 times, 15% Qinling EC at 1500 times, 73% Kraft at 2000 times, 15% Broth Neoprene at 2000 times, or 35% special emulsion oil at 1000 times. Focus spraying on the upper, tender parts of the plant. When growing pollution-free vegetables, avoid using diclofen for aphid control. These practices ensure effective disease management while maintaining plant health and productivity.
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