Pear hibiscus. This worm was given priority control in three key periods. The first period was in early March. When overwintering adults emerged in large numbers, but there was no spawning, they chose to have no winds and sunny days. They sprayed from 4.5 to 4 in the morning. % Cypermethrin EC 1500 times. In the second period, when the flower was 80%, it was used to control a young nymph of a young age and sprayed with a 1.8% of avermectin EC 5000 times. The third time from the end of April to the beginning of May, the first generation of adult emergence peak, spraying 2.5% cyfluthrin EC 2000 times, do a good job of the three prevention and control, can basically control the harm throughout the year. After heavy wheat harvest, it can be sprayed with 1.8% avermectin EC 5000 times solution or 10% imidacloprid WP 2500X solution or 48% Roche Bentime EC 500X solution.
Pear borer. Peach and pear mixed gardens focused on the prevention and control of the first and second generation of insects in Taoyuan. The worm migrated to the pear orchard in July. After mid-July, the amount of eggs laid increased rapidly. The number of eggs laid from the 20th to the beginning of September was very high. maximum. Prevention and control of adults and eggs as a standard, and prevent hatchling larvae, after 7 months, generally 8 to 10 days, spray a drug, commonly used agents are 0.3% matrine aqueous 800 times, 25% diflubenzuron 3 suspension Agent 1500 times, 48% Lester's cream 1500 times, 2.5% cyhalothrin emulsion 1500 times, 35% chlorantraniliprole water dispersible granules 12000 times or 1% metformin cream 4000 times.
Pygmy mosquitoes. The larvae mainly harm the shoots after an anthesis, so it is important to focus on the ground control in the early April, early May, early June and adult emergence and emergence of larvae. There are a large number of adult eclosion stages 2 weeks before emergence of overwintering adults, or at the peak of defoliation of first and second generation mature larvae and after rain. It is possible to use 52.25% DF 2000 to 2500 times, 48% 1500 times, 0.25 times of 2.5% cyfluthrin EC or 2500 times of 10% imidacloprid wettable powder.
Pear anthracnose. In the middle of March (before the flowering buds of pear trees are green), 5 Be lime sulfur is sprayed in the whole garden to kill the source of overwintering bacteria. After flowering, the protection of the new leaf is strengthened, and 80% of Dasong M-45 WP can be sprayed with 800 times of liquid and sprayed twice. The interval is 10 to 12 days. From the middle of May to the end of June, the fruit is sprayed to protect the fruit and sprayed once every 10 to 12 days. In July, the fruit enlargement period is shortened and the interval is shortened. The spray is sprayed 7 to 10 days. According to the rainfall, no rain can be appropriately extended. Appropriately shortened. The protective bactericide can be 80% Dasheng M-45 WP 800 times solution or 50% Ketan WP 600 times solution or 68.75% Mntone Mn-Zn water dispersible granules 1200 times. It can be used at the end of May and early June. Spray copper sulphate once: Lime: Bordeaux mixture with water 1:3:280; 20% bromocretonitrile wettable powder 1500 times or 50% ramram manganese salt wettable powder 1500 times as therapeutic bactericide 70% thiophanate-methyl wettable powder 1200 times or 10% difenoconazole water dispersible granules 1500 times, alternating use.
Pear scab. Focus on early prevention and control, when the flower buds are about to turn green, spray 5Be lime sulfur mixture, which can effectively reduce the initial infection source of pear black spot disease. When 80% of the flower is sprayed, 80% of Dasong M-45 WP is sprayed with 800 times of liquid, and at the end of April and early May, 10% of the world's high-water-dispersible granules are sprayed 4000 times. From May to July, it is advisable to adopt a pre-rain spray protection agent, spray the fungicide after the rain, that is 1:3:260 ~ 280 times Bordeaux mixture or 80% of Dasheng M-45 WP 800 times or 50% Ketandan wettability 600 times liquid powder, and 70% thiophanate-methyl WP 1200 times, 10% difenoconazole water dispersible granules 4000 times, 40% fluorosilicon emulsion 8000 times and so on. In mid-July, after the rapid expansion of pear fruit, in order to prevent the contamination of Bordeaux mixture on the fruit surface, the protective agent should be 80% Dasheng M-45 WP 800 times, the therapeutic agent can spray 10% difenoconazole water Dispersed granules 5000 times.
Pear ring disease. Focus on the protection of pear trees in the early stage of growth. After flowering, spray 80% of fresh M-45 WP 800 times at intervals of 10 days. After May, the protective agent and the systemic fungicide are used interchangeably. 80% of Dasong M-45 WP 800 times, 70% thiophanate-methyl wettable powder 1200 times, 50% carbendazim WP 800 times, 80% EB aluminum wettable powder 800 times.
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