Common diseases of rhododendron
1. Leaf swelling disease. Before the disease, especially during the tapping and leaf spreading, Bordeaux solution of 1purl 200 can be sprayed, and the diseased leaves can be removed in time. Before germination, 0.3-0.5 Bordeaux solution or Bordeaux solution of 1 handkerb 200 can be sprayed 2-3 times, usually once every 7-10 days. After the disease, 65-80% mancozeb 500 times or 0.3-0.5 Baomesulphur mixture can be sprayed 3-4 times, once every 7-10 days.
2. Leaf spot and brown spot. Spraying 1000 times of thiophanate methyl, 4000 times of mancozeb and 4000 times of mancozeb from May to August can effectively control the development of the disease. In order to prevent leaf yellowing, ferrous sulfate can also be applied.
3. Coin disease: the top of the damaged twig leaves is covered with dense white or pink mite layer, and sometimes the leaves produce mite galls, which are mostly caused by the infection of leaves stung by aphids. Its control methods: while removing diseased leaves, spraying agents containing copper sulfate, spraying omethoate EC or putting carbofuran directly in the basin can control aphids and other prick pests.
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The processing technology of γ-aminobutyric acid tea has been identified.
The successful "processing Technology of γ-aminobutyric Acid Tea", led by Dr. Lin Zhi of the Tea Institute of the Chinese Academy of Agricultural Sciences, recently passed the expert appraisal organized by the Department of Science and Technology of Zhejiang Province. The appraisal committee listened to the technical research report of the project team and reviewed the tea samples. after careful consideration, the appraisal committee agreed that the technology was comprehensive and systematic, had a number of innovations, filled the domestic gap, and ranked at the international leading level in similar research. The main research results are as follows: 1. Seven tea varieties suitable for the production of γ-aminobutyric acid tea were selected for the first time.
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Picking and fresh leaf treatment technology of famous tea
The quality of famous tea depends largely on fresh leaf raw materials, but in recent years, the quality consciousness of tea farmers has declined, especially in the picking process, which affects the quality of famous tea. The technology of picking famous tea and processing fresh leaves is introduced to tea farmers. First, the picking of famous tea fresh leaves raw materials requirements are extremely strict, the selected raw materials should be uniform in thickness, complete, fresh, clean, it is strictly prohibited to mix with disease and insect leaves, damaged leaves and scales, fish leaves, purple buds, not to mention the pedicle, tea fruit and old leaves and other sundries.
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