Mulberry Mulberry Tiger

Scientific name Xy10trechus chinensis Chevrolat Coleoptera, Cerambycidae. Alias ​​tiger Tianniu, Tabby Tianniu. Distributed in the country's main silkworm area.

Host mulberry, apple, citrus, grape and so on.

The characteristics of larvae damage the stems of mulberry stems, resulting in large tunnels, bark cracking, nutrients, moisture transmission is blocked, so that mulberry leaves small, yield decreased, a serious large number of dead. In recent years, the worm has been harmed in the old mulberry garden in the north, and some parasitism rates have been as high as 60 to 80%. Seriously affect the yield and quality of mulberry leaves.

Morphological characteristics Adult body length 16-28mm, the shape of a wasp. The tentacles are short, reaching only the base of the elytra. The prosthodontic plate is nearly spherical with yellow, reddish brown, and black horizontal stripes. The base of the elytra is wide, with yellow and black oblique bands on the wings. The front edge of the female prosthodontic plate is bright yellow, with a pointed abdomen and bare sheath wings. The front edge of the male pronotum was yellow to brown in color and the end of the abdomen was covered by a sheath wing. Eggs 5mm long, long oval, milky white. The last instar larvae have a body length of 80mm, light yellow, and a cylindrical shape. The head is small and is hidden in the first thoracic joint. The first thoracic swelled, with a brown blocky marking on the front and both sides of the back. On the back of each section of the abdomen, belly masks are tan-colored. Bare-necked long 30mm, spindle-shaped, light yellow.

Habits of life Liaoning, Shandong, the third generation occurred in the second generation, with winter larvae. Activities began in mid-April of the following year. Mature larvae were gradually licked from early May to late June. Feathering, mating and spawning began in early June and peaked in late June and early July. Adults lay eggs soon after they hatched, and the hatched larvae ate until the early winter of November. The spring of the second year continued to harm until the end of July to August, adults emerged into the hole, to complete the l generation; before and after a total of 14 months. The adult larvae that hatched after re-spawning were required to pass the second winter and reemerged in June of the fourth year. After a total of 22 months, they completed one generation. Therefore, two generations were completed, which took about three years. The overlap of this insect generation is very obvious. The egg period is 10.6 days. The larvae molt 5-6 times. After the larvae matured, they turned their heads to feed 7-8cm upwards. The larvae licked an oval into the hole on the side of the tunnel. The mature larvae penetrated into the xylem by digging into the hole, and they were smashed into a "7"-shaped tunnel, and bite a lot of wood chips to block the formation of diverticulum above the tunnel. The pupation was in the diverticulum and the pupal stage was 21 days. After the adult eclosion emerged, the sawdust and insect feces were opened and the hole was opened by biting into the hole from the original licking hole. The females lay their eggs in cracks or crevices in the trunk, producing 1 grain at a time and producing 104 grains per woman. The lifespan of females is 18.6 days, and the males are 24.8 days. There is a difference in the degree of damage among breeds: autumn rain, iron handle, sword holding, lake mulberry and other varieties suffer more than big white stripes, Xichang, moussao mulberry and so on. The mulberry mulberry cultivars and dry sorghum plants are not affected. The age of the victims is heavy and the young age is light. Prosperous growth, less bark cracks, and less dead tissue damage. Natural enemies have woodpeckers.

Prevention Methods (1) Adults were caught in early June and early August. (2) Assassination of the larvae in the mulberry. (3) Exterminated dead plants are required to be burned before the end of May. (4) Fully maintain the newly planted young mulberry. When there are oily black spots on the bark, kill the tree larvae in time. After the summer cut, check it again. (5) If necessary, insert a poisonous swab into the bottom boring hole or use a cotton ball impregnated with 80% dichlorvos EC 10 times to block the boring hole. It is also possible to spray the bark after the summer cut with 50% Cascade Pine EC. (6) Pay attention to the protection of natural enemies.

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