The scientific name Xylinophorus mongolicus Faust is from the order of Coleoptera. Alias ​​weevils, small cattle, gray old road, Mongolian earth elephant. Distributed in the Northeast, North China, Jiangsu, Inner Mongolia, Northwest and other places. In addition to damaging cotton, hemp, and millet, the host also harmed Junda vegetables, beets, melons, corn, peanuts, soybeans, sunflowers, sorghum, tobacco, and fruit tree seedlings. Injury characteristics Adults feed on cotyledons, buds, and leaves of freshly emerged seedlings such as cotton. They are often harmed by clusters. They can eat the leaves severely, bite off the tops of the stems, cause seedlings to become ridged, or eat the leaves into semicircular or round shapes. Shaped nicks. Morphological characteristics Adult body length 4.4-6.0mm, width 2.3-3.1mm, oval, gray body, dense gray-black-brown scales, scales in the chest and the phase between the three brown, two white vertical Bands, white spots on the inner shoulders and wings, bright copper color on the head, esophageal l0 longitudinal columns engraved. The head is short and flat, the middle is thin, and the antennae are red-brown and geniculate. The rod-shaped head is oval-shaped, the tip is pointed, the length of the anterior chest is larger than the width, the edge of the anterior chest is wide, the sides are swollen, and the elytra is significantly wider than the anterior chest. Egg length 0.9mm; width 0.5mm, long oval shape, milky white at first production, dark black after 24 hours; larvae body length 6-9mm, body milk white, no foot; nudibranch length 5.5mm, milky yellow, compound eye gray. Ketone Test Strip,Urinalysis Reagent Strips,Urinalysis Reagent Paper,Reagent Strips For Urinalysis Changchun Medicon Technology Development Co., Ltd , https://www.teststrip.pl
Life habits Inner Mongolia, Northeast China, North China 1 year, Yellow Sea area 1 - 1.5 years 1 generation, adult or larvae wintering. When the Hunchun temperature is nearly 10°C, it begins to unearth and the adults become active during the daytime. Before and after l0, the activity is the most prosperous. It is disturbed by falling to the ground; there is little activity at night and rainy days, and there are many potential lurking between the foliage and the crop roots. In the seam. Cotton, tobacco, and seedlings and saplings of mulberry and tea trees are more severely affected and affect fertility. May-June has the heaviest damage. Adults feed for a period of time and begin mating. In general, spawning starts in May, and more pieces are produced in the topsoil. Spawning period of about 40 days, each female can lay 200 eggs, egg period 11-19 days. Adults disappeared after August. In late May, the larvae begin to hatch. The larvae live in the soil and damage the plant's underground tissues. By the end of September, the earth-building room is overwintering. Hunchun continued its activities and began to mature in mid-June. Emergence began in early July, wintering in the chamber without excavation, unearthing in April of the third year, and generation 1 in 2 years. This worm often mixes with large gray elephant clams.
Prevention methods (1) Drill and seal the ditch around the weight of the damaged plots. The width and depth of the ditch is 40cm. The fresh or spoiled weeds are used to induce the insects to concentrate and kill. (2)Spray or irrigate 50% malathion emulsifiable concentrate 1000 times or 35% Shunfeng No.2 emulsifiable concentrate 1000 times, 4.5% high efficiency cyanomethrin buttermilk extract, and 50% octanicinone emulsifier 2000-3000 times liquid. In addition, it is also possible to spray 1.5% methyl 1605 powder to kill adult worms at the height of the unearthed period from April to May, and apply 2-3kg per 667m2.