The number of tea buds is a newly discovered new disease of tea. The growth of the bud leaves is slightly blocked, and the leaves shrink and curl, which directly reduces the yield and quality of spring tea, causing a large economic loss to tea production. Xiaobian, a Chinese pesticide net , compiled relevant information on the occurrence characteristics of bud blight and prevention techniques, and used it for reference during prevention and control.
1. Occurrence of damage characteristics Tea bud disease is mainly caused by nutrient-rich spring tea young buds, which first produce yellow or yellow-brown small lesions at the tip or leaf edge, and then expand into irregular shapes, and the edge of the lesion is not obvious. The tip of the bud is black and brown, and the atrophy can not be stretched. The leaf of the lesion is 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 fungus of the genus Hymenoptera. At a temperature of 15-20 ° C, when the spring rains and the humidity is too large, the spores of the pathogen spread to the young organs by the wind and rain. When the temperature is higher than 28 ° C, the growth of the bacteria is inhibited and the disease is stopped.
2. Prevention and control technology 2.1 Strengthening fitness cultivation, first of all, to apply organic fertilizer to the tea garden, spray the sodium nitrite in combination with the germination stage to improve the disease resistance of the leaves, generally use 1.8% sodium nitrite solution per 667 square meters. 50-75 kg of water spray 2-3 times, not only can effectively prevent tea bud blight, but also can significantly increase chlorophyll content and increase tea yield.
2.2 timely picking. Early harvesting and diligent mining during spring tea can be accompanied by the removal of bacterial sources to reduce the occurrence of diseases.
2.3 timely medication. The pesticide network reminds everyone that it is better to use the medicine sooner or later, and strictly control the safety interval of medication. The time of administration can be used once in the germination stage and early onset of spring tea. The tea garden with serious disease in the same year can be used for sealing the garden at the end of autumn tea. The medicine can be selected: 50% thiophanate WP or 50% carbendazim P500-800 times liquid spray; 65% daikon zinc WP600 times liquid can be used in non-picked tea garden, the fog point should be fine when spraying, and the spray should be uniform, Improve disease prevention.
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