Eggplant to protect against eggplant 28 Ladybug harm

The eggplant 28th ladybug is the main pest on the eggplant in Jiangsu Province. Its adult and larvae can damage crops. The damaged leaves only reside in the epidermis, forming irregular transparent zigzag reticular spots, and can also harm flowers and fruits. After being damaged, it becomes hard and has a bitter taste. When it is severe, it forms a deformed fruit and it falls off early after the flower is damaged.

The eggplant 28-spot ladybirds occur in the water for 3 generations a year, and they overwinter as adults in the leeward, sun-facing walls, weed piles, and earth seams. Adults emerged in mid-late May, mainly affecting spring potatoes and some weeds, and they migrated to eggplants in late June. Adults lay their eggs on the back of the upper middle leaves, and the newly hatched larvae begin to crawl after 5-10 hours of clustering, and then act on the back of the leaves to harm. The larvae are divided into four instars. The instar larvae have a duration of about 4 days, a pre-loading period of 1-2 days and a flooding period of 3-5 days. The mature larvae metastasize to the lower part of the plant and to the leaves. From the end of June to the middle of July, it is the first generation of the peak of the hazard. From late July to mid-August, it is the second generation of the peak of the hazard. From late August to early September, it is the third generation of the peak of the hazard, and the most serious is the first generation. , followed by the second generation, the lightest of the third generation, adults began to winter over the end of September.

Prevention and control of eggplant 28 ladybird insects, in the adult egg laying peak period, take the method of manual egg extraction and catching adults to mitigate harm. At the same time, it can be used during the egg incubation period. The applicable drugs include 2.5% Lambda-cyhalothrin EC, 1.8% Avermectin EC, 48% chlorpyrifos EC, and 5% fipronil SC. In addition, the damaged plots must be cleared of dead leaves and field weeds in time to reduce the source of overwintering insects.

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