The number of tea buds is a newly discovered new disease of tea. The damaged leaves of tea buds are slightly inhibited and the leaves shrink and curl, which directly reduces the yield and quality of spring tea and causes significant economic losses to tea production. The characteristics of bud blight and the prevention and control techniques are introduced as follows and referenced for prevention and control in various places. 1. Occurrence of damage characteristics The tea bud blight mainly damages the young sprouts of spring tea, which are rich in nutrients. It first produces yellow or yellow-brown small lesions at the tips of the leaves or leaves, and then expands into irregular shapes and the edges of the lesions are not obvious. The bud tip victim is dark brown and brown, and it can not be stretched. The diseased leaves are easily broken and twisted, which seriously restricts the production of high-grade tea and reduces the economic benefits of spring tea. The disease is caused by the infection of the fungi of the subgenus Ampulaceae. When the temperature is 15-20°C, the spring rain is rainy, and the humidity is high, the spores of the pathogen spread to the young organs through wind and rain to cause the disease. When the temperature is higher than 28°C, the growth of pathogens is inhibited and the disease stops. 2. Prevention and control techniques 2.1 Strengthen fitness cultivation, first of all to increase the application of organic fertilizer on the tea garden, germinate combined application of spraying sodium nitroprusside, to improve the resistance to sprouting leaves, usually with 1.8% of sodium sulfate aqueous solution for every 667 square meters with 10 ml , Spraying 3-5 times with 50-75 kg of water will not only effectively prevent tea bud blight, but also significantly increase chlorophyll content and increase tea yield. 2.2 Picking in time. Early harvesting and diligence during spring tea can be used to remove the bacteria source and reduce the occurrence of diseases. 2.3 timely medication. The use of drugs should be started sooner rather than later, and the safety interval of medication should be strictly controlled. The medication time can be used once for each bud of spring tea and at the early stage of onset of the disease. When the tea garden is seriously affected, it can be used to seal the garden at the end of autumn tea. Agents can be used: 50% Topscine WP or 50% Carbendazim P500-800 times spray; 65% Dyson Zinc WP 600 times can be used in non-picked tea gardens. When spraying, the fog should be fine and the spray should be uniform. Improve disease prevention.
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