The eggplant twenty-eighth ladybug belongs to the Coleoptera and Coccinellidae family, commonly known as the flower sister and flower budworm, and it is one of the major pests that harm eggplant. Adults and larvae can harm eggplant and eat leafy meat. In severe cases, only leaf veins are left and plants die. Eggplant twenty-eight ladybirds sometimes also harm fruit and tender stems, feeding on petals and sepals, making the fruit hard, bitter, and of reduced quality.

Morphology and habits Eggplant twenty-eight adult ladybird insect about 6 mm long, yellowish-brown, three dark spots at the base of the eel wing and four dark spots at the rear are almost in a straight line, dark spots are not connected at the joints of the two wings, insects The body is hemispherical; the egg length is about 1.2 mm, yellowish-white at the time of first production, and brownish afterwards. The eggs are arranged densely in the egg masses; the larvae are about 7 mm in size, and the pale yellow color of the larvae is gradually changed to white and the body hair is white. About 5.5 mm long, yellow-white. In mid-to-late May, the eggplant adult of the twenty-eighth ladybird eggplant began its activities and flew to the weeds to inhabit. She later transferred to the eggplant for harm. The second-generation larvae emerged in late July and were endangered in mid-August. The second-generation larvae emerged from mid-August to early October and were later jeopardized. The period from mid-June to mid-August is the spawning period. The egg period is generally 5 to 11 days, and the larval period is 16 to 26 days. After a generation of larvae is pupaed (five to 7 days in the flood period), it is several months until the adult emergence of the second generation. The optimal temperature for eggplant 28-spot ladybugs is 22°C to 28°C, and the relative humidity is 76% to 84%.

Control techniques for killing adult worms: During the period of adult worms, use their habit of suspended animation to kill pots. Good results at noon. Egg picking block: In view of the eggs of the 28-spot ladybird eggplant, the eggs are lumpy and dozens of grains per piece can be harvested manually. Site preparation and treatment of stubble: After the crop is harvested, eggplant 28-spot ladybugs are lurking on the stubble. Combine the stubble with cultivated land to eliminate the latent eggplant 28-spot ladybug. Chemical control: Occasionally, the timing of larval incubator or young instar larvae will be used for timely application and control. Can be used 2.5% deltamethrin 3000 times, or cypermethrin 4000 times spray.

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