The scientific name Cryphalus exignus Blandford Coleoptera, small maggots. Alias ​​Mulberry, Mulberry little stupid, black sting bug, etc. Distributed in the country's mulberry production areas. Hebei, Shaanxi, Sichuan, Shandong, Zhejiang, Jiangsu, Beijing, Guizhou, and Anhui were more serious. The main sang. Injurious features and larvae damage the phloem of the branches and the edges of the xylem to form a chrysanthemum-shaped tunnel, causing the passage of nutrients in the sapling buds to form dumb buds, and the severely damaged dumb buds account for 20% to 33%. Heavy damage in early spring, and sometimes there are 20 to 30 buds. Morphological characteristics Adult body length 1.5-1.7mm, elliptic cylindrical, dark brown, dense light brown short hair. The head is small and hidden under the prosthodontic plate. The tentacles are hammer-shaped and the ends are enlarged into an oval shape. The chest occupies 2/5 of the entire body, and the pronotum rises with a discoid protrusion. The elytra is black and there are 10 distinct longitudinal grooves. The female end of the abdomen was enlarged and the male was flat. The body is yellowish-white at the time of first feathering, and then turned dark to black. Egg length 0.6mm, long oval, jade white. The last-instar larvae have a body length of 1.5-1.8mm, a cylindrical shape, often curved, colostrum white, and later yellow. 2mhl long, cylindrical. (right) Prevention methods (1) In winter, cutting off the damaged branches and stems can also remove dead branches and dry piles before the emergence of the first to second generations of adults and prevent them from breeding eggs. (2) Bundle traps are used to bind semi-dying shoots on branches or stems to induce spawning; some of the 1 year old shoot bases can also be girdled with a knife, resulting in a half dead state, which induces their spawning or parasitic killing. . (3) Before germination in early spring or in late autumn, spray 50% of the oil of Difficulty-Indigenous Fertilizer 500 times or 80% of Dichlorvos Emulsifiable Concentrate 1000 times. In order to prevent diseases in late autumn, 70% thiophanate-methyl wettable powder 800 times or 43% formalin 15 times liquid can be mixed in the above-mentioned agents. (4) Biological control During the spawning period of S. pinnatifida, Turkish gutta lizards released by artificial breeding were released. Each 667 m2 mulberry field released more than 2,000, and the whole mulberry garden had a better release effect. The areas with heavy damage should be widely promoted. Veterinary Drugs,Veterinary Medicine,Neomycin Powder,Active Pharmaceutical Ingredient Tangshan Finely Animal Care Co.,Ltd , https://www.faczyme.com
Life habits Shandong, Hebei, Jiangsu, Zhejiang, 3 generations, born in Liaoning, 2 generations, with adults in the branches of the tunnel winter. In late March and mid-October in the following year. The overwintering adults began to boring holes at the end of March, followed by spawning and spawning. The spawning period was longer, the occurrence period was uneven, and generations overlapped. Adults of each generation emerged in mid-June, early August and mid-September. The worm prefers to reproduce and damage on a half-dried or dead trunk, forming a chrysanthemum-shaped tunnel with uniform thickness, and constructing a copulation point (ie, a mother tunnel) on the semi-dry branches. The egg masses produce 7-22 eggs per piece. Each female produces l5-47 eggs and the egg period is 12-15 days. The generation of larvae is 20-25 days, and the second and third generations are 18-20 days. At the end of the tunnel, the phlegm in the phlegm and phlegm can be eliminated within 5 to 7 days. During the emergence, a round feather hole is bitten above the diverticulum. In late September and early October, a large number of adults were supplemented with nutrients and migrated to live trees for wintering. The adult life span is 20 to 23 days, and two to three generations are 18 to 20 days. The natural enemies were Turkish gutta.