Bifascia bifasciata Jaeoby, genus Coleoptera, Family Cyperaceae.
【Host】Citrus and other fruit trees.
[Pest], adults bite young leaves.
【Morphological characteristics】Adult insects have a wide oval body with a body length of 6.0 to 6.5 mm; the head, ventral surface, foot and antennae are pitch black, the dorsal plate of the forebrea, small shield, and elytra are yellow to reddish brown and shiny; the elytra have no spots or shell spots; the antennae are thick and slightly shorter than the anterior thorax, and the serrated after 5 segments. The eggs are bright yellow when they are first laid, and then they are black and brown, resembling worm dung. Larvae pupate in the worm sac.
【Prevention and control method】Refer to the prevention and control of malignant orange mesh jumping nail. (1) Clear the garden in winter, remove moss, lichen, dead branches and leaves, weeds and loose soil under the canopy, and destroy its overwintering and pupal sites. (2) During the growth period of spring shoots, before the adult worms lay eggs, timely spraying refuses to avoid and destroy their spawning sites. (3) Spray control when a large number of larvae appear for feeding before and after flowering. Pharmaceutical options: 48% chlorpyrifos emulsion 1000 ~ 1200 times liquid, 90% crystalline dimethoate 800 times liquid, 50% malathion emulsion or 50% octylthion emulsion 800 ~ 1000 times liquid and pyrethroid agents, such as 2.5% cypermethrin emulsion 2500 ~ 3000 times liquid, etc.