Potato ladybug

Potato lady beetle (HenosepilachnavigintioctomaculataMotschulsky) belongs to Coleoptera, Coccinellidae. It is widely distributed in the north of China. It is mainly harmful to potatoes, eggplant, cabbage, rape, beans, melons and so on.

[field identification] both adults and larvae eat harmful leaves and gnaw on one side of the epidermis and mesophyll, resulting in many reticular pits. The adult is about 8 mm long and hemispherical. The body back and sheath wings are yellowish brown, and there is a sword-shaped black spot in the center of the forechest dorsal plate. There are 2 black spots on each side. Each sheath wing has 14 black spots, of which there are 3 spots at the base of the sheath wing, and the 4 spots behind it are not in a straight line. When mature, the larvae are about 9 mm long, yellow, spindle-shaped, dilated in the center, protuberant in the back, black spines on the back of each node, and 6 thorns on each branch.

[occurrence regularity] there are 1 or 2 generations a year, and adults gather in leeward-facing cracks, walls and caves to survive the winter. In the second year, the overwintering adults began to live in the middle and late May, and the peak damage period was in the middle and last ten days of June and August to September. Adults are active during the day, have false death, fall to the ground motionless when disturbed, and secrete mucus. The larvae are infested and slow to move.