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Strengthen field investigations to ensure timely prevention and control of tea pests
At present, there are many seasons of tea tree pests, such as tea green tea leafhopper, tea leaf teapot, tea black poison moth, tea orange tea leaf, etc., which should be strengthened and field investigations must be conducted to prevent and control the work in time. (1) Hymenoptera larvae: This worm is commonly found in the tea region of the province and is expected to be moderately weight-producing. According to the survey conducted on the May 20th survey site at Suichang, the larvae amount was 8.7, and the nymphs accounted for the total number of insects. 95.5%, as the current temperature continues to rise, the insect population will increase rapidly. All tea gardens with more than 8 worms should be sprayed and prevented. Pharmaceutics can use biological agent Tiantai (BT and avermectin coupling agent) 40-50 g/mu, 10% imidacloprid powder (Lectares net, one pass, Da Gongchen) 20g/mu, 90% WanLing wettability Powder (15-20 g/mu), safety interval is 7 days. 2. Acupuncture points: Zhejiang northerly is more important than southern Zhejiang. According to the investigation of Yuhangjingshan Town, the occurrence of the first generation tea planthoppers in local tea gardens in the town was as high as 15,000-20000 heads/mu, and the second generation of field 2 larvae had obvious wormholes twice. The peaks and the appropriate period for prevention and control are at the end of May and beginning of June and early June respectively. For the tea gardens with more than 4,000 acres of insects per acre, control should be sprayed. Pharmacy can use Tiantai 40-50g/mu, 2.5% enemy killed 20-25ml/mu, 2.5% kaptrin 20-25ml/mu, 35% Saitan oil 80ml/mu, safety intervals It is 7 days, 3 days, 7 days and 7 days. Biopesticides should be used on a cloudy or late afternoon. 3. Black tea venom moths: According to the Deqing county survey and report point survey, the wintering adult eclosion peaks are around May 23, and the second generation larvae hatch from the end of May to the beginning of June. The prevention and control period is in early June and the survey method is used. Each tea plantation with a tea plantation amount of more than 10 teas should be sprayed and controlled in a comprehensive manner. The pharmaceutical agent may use 2.5% Uranus EC 20 ml plus 80% dichlorvos 50 ml/mu, and dichlorvos may also be used. The safety interval is 7 days. 4. Tea orange soup: According to the tea plantation survey conducted by the forecast station of Suichang County on May 15, the leaf cutting rate was 57.6%, with an average of 8.5 heads per leaf and a maximum of 32 heads. In particular, the tea gardens that had not been enclosed with lime sulfur in the past year, should have chemical control for tea plantations with eucalyptus leaf rate above 70% and waterlogging index greater than 10, and 1% avermectins (insecticides) can be used as the agents. (Insects and insects) 20 ml/mu, Tiantai 40-50 ml/mu, 15% Phytolactone (Broom, net, fast ketone) Emulsifiable concentrate 30 ml/mu, 73% chlorimiphene (Crete) EC 3000 times. The safety interval is 7 days. The pests that occurred during this period were: Tea Lizard weevil (heavily occurring in Yuhangjingshan Town), teat moth, tea leaf roller moth, and tea moth. Tea Lily Weevil uses 2.5% Uranus EC, 98% Bataan WP, and other insect pest control agents can be used to treat tea worms.
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