Cotton Arcanus

Scientific name Popillia mutans Newman Coleoptera, Lycorisidae. Alias ​​bean blue beetle, no spotted arctic beetles. Distribution in Xinjiang, Tibet, and Qinghai have not been reported, but they are widely distributed throughout the country.

Host cotton, corn, sorghum, soybeans, rose, black plum, rose, peony, acacia, chestnut, apple, kiwi and so on.

The characteristics of the adult insects harm the flowers and young leaves, causing the flowers to be deformed or die. Damage is more common and serious.

Morphological characteristics Adult body length 11-14mm, width 6-8mm, body dark blue with purple, green flash; the back of the middle width, slightly flat, narrow head and tail, no rump on the hip plate; trapezoidal base, tentacles, 9 sections, Rod section 3, the arch of the thoracodorsal plate is obvious; scutellum short broad triangle, large; elytra short broad, narrow rear narrow, small scutellum with a pair of deep lateral groove on the back, with 6 shallow back Engraved ditch, the second short, slightly more than the back end of the midpoint; foot black stout, the outer edge of the front foot tarsal 2 teeth, male feet 2 feet, large claws do not split. Eggs nearly spherical, milky white. Larvae body length 24-26mm, bending was "C" type, head yellow-brown, body wrinkled, transverse hole in the anus.蛹 蛹 nude, milky yellow, orange-yellow back.

An annual generation of habits and wintering of the last instar larvae. Adults from south to north appear from May to September and are active during the day. In late August, there were more adults in Anhui. Adults are good at flying. After they are harmed, they flew to other places for damage. The adult insects have a feign death and phototaxis. Although the amount of its occurrence is not as good as that of a small blue-and-white beetle, it has a long period of damage, and it has a large amount of potential danger in individual areas.

Control methods see Chinese Arctic golden turtle.