Blight

Green Pest Management Techniques for Tea Trees Main Targets of Control ↑ Tea Blight Disease → Tea Looper Pests: Tea Green Leafhopper, Tea Looper, Tea Caterpillar, Tea Black Worm Moth, Black Scale Psyllid, Tea Red Mite. Diseases: Tea Blight Disease, Tea Anthracnose. Key Control Measures Agricultural Control 1. Timely Harvesting. Harvest young buds and leaves according to the requirements of tea production to reduce the population of pests like the tea green leafhopper, mites, and some bud diseases residing on the canopy surface of the tea tree. 2. Pruning as Needed. Prune tea trees after the spring harvest and in late autumn according to the requirements of tea garden management, reducing pest populations and creating conditions unfavorable for pests. Generally, deep pruning or heavy pruning is done after the spring harvest, and light pruning is performed in late autumn. 3. Garden Tilling. In late autumn, till the tea garden combined with the application of base fertilizer, which is detrimental to the survival of scale insects and weevils overwintering in the soil, thus reducing their occurrence in the following year. 4. Timely Garden Cleanup. Clear and bury leaves and topsoil near the roots of tea plants in late autumn, which can…

Tea grey blight is one of the most serious diseases affecting tea leaves, also known as tea shoot blight, primarily caused by the plant pathogenic fungus Pestalotiopsis sp.. This disease mainly affects mature and old leaves but can also infect young shoots, causing leaf withering, shedding, and even death of the entire plant, significantly impacting tea yield and quality. In recent years, there have been reports in China identifying a diversity of pathogens causing this disease, with multiple species within the genus Pestalotiopsis showing significant biological differences, making control challenging. Currently, chemical fungicides such as carbendazim, thiophanate-methyl, copper compounds, and others are primarily used for control, while biofungicides like pseudomonads, bacilli, and antibiotics (such as Wuyi mycin, camellia saponin, kasugamycin, and nisin) and extracts from approximately 30 plants, including Datura, are increasingly being applied. This article discusses the distribution and damage of tea grey blight, the biological characteristics of its causative agents, and epidemiological patterns, and proposes integrated control measures to provide guidance for practical disease management. I. Distribution and Damage Tea grey blight is widely distributed in tea-growing regions, including India and Japan, and occurs in all tea-producing areas in China. On young shoots, mature, and old leaves, the…