Mulberry moth

The scientific name is Lymantria dispar (Linnaeus), Lepidoptera, Muscidae. Alias ​​Kaki, caterpillars, etc. Distribution in the country's silkworm area.

There are more than 500 kinds of plants such as sang, Dongdong, apple, pear, peach, apricot, walnut, persimmon, chestnut, lotus root and poplar.

The injurious characteristics of the 2nd instar larvae are scattered and harmed. During the day, they are hidden in the bark joints, branches, branches, under the tree weeds and stones, and the trees are damaged at night. The larvae erode the leaves, and the entire tree leaves are eaten when severe.

Morphological characteristics of adult male and female, male 18-20mm long, 45-47mm wingspan, dark brown. The head is tan, and the antennae are feathery brown. The color depth of the outer edge of the fore wings is banded, and the rest of the microstrips are grayish. There are 4-5 dark brown wavy lines on the wing surface; there are l-brown-brown spots in the center of the middle chamber, and there are 4 dark browns on the middle ventricular cross-section. There are 7-8 dark spots between the outer rims. The color of the rear wing is lighter, the outer edge is thicker, and the cross veins are darker. The female body is 25-28mm long, and the wingspan is 70-75mm. The stain is slightly yellowish. The antennae are black and short-puffed. The horizontal lines on the forewings are similar to those of the zebrafish. They are dark brown. There is a brown wavy horizontal line near the outer edge of the hind wings; there are 7 dark brown spots between the outer rims. Abdomen hypertrophy 7i end dense yellow-brown scales. Oval or oval, diameter 0.9-1.3mm, early yellow brown gray-gray. Larvae body length 50 to 70mm, the first yellow-brown, the front has "eight" shaped black lines; the back of the skull is gray and black, the back line is brown, with a dark red belly, chest and belly feet dark red. Each of the body segments has six rows of hair follicles. The back of the center has a pair of bright colors. The l.5th segment is blue-gray, and the 6th to 11th segments are purple-red. The upper brown and black are short-haired. The hairy tumors on both sides of each section were born with yellow-white and black long-haired hair bundles. The hairy tumors on both sides of the chest grew up, with black long-haired hairs growing on them. Each of the 6th and 7th ventral section of the abdomen has a red columnar venom gland, also known as a retractile gland. The dragonfly is 19-24mm long, dark brown after dark brown, and the original larval hairy tufts have yellow short hair bundles. Living habits are born for 1 generation, and the egg masses are used for wintering on tree bodies, rocks, and terraced fields. When the host germinates, it begins to hatch. The young larvae of the first instar ate during the day and feed at night. They are disturbed by the drooping drooping and spread by wind, so they are called caterpillars in the fall. After 2 years of age, they are dispersed and fed, and they inhabit the tree rights, skin seams or soil and stone joints under the tree during the day, and they feed on trees in the evening. 50-60 days of larval period, in mid-late and late June began to gradually climb to the hidden place to hide the phlegm, puerperium period 10-15 days. Adult eclosion occurred in July. Adult phototaxis, male moths dance between crowns and leaves during the day, females are bulky, heavy, and rarely fly. They often spawn near the pupa, and they prolific in the tree's shade on the branches, 400-500 pieces of eggs, irregular in shape, covered with yellow-brown scales at the end of the female moth, and each female spawns— Two, about 400 to 1,200. There are nearly 200 natural enemies known, including the common venom, melanoma, beetle, hippocampus, gymnospermia, gymnospermia, gypsy moth, flat-bellied bees Caterpillars catch flies, isolate cheeks, and flies.

Control methods (1) Use larvae to lay piles of bricks and stones at the base of the trunk during the daytime to make use of the latent habits of the trees to trap the second instar larvae and kill them during the day. Or apply a 50-60cm wide drug tape i on the trunk to kill the larvae with a high-potency residual contact agent. It is also possible to spray high-strength contact agents with long residual effects directly on the trunk. (2) The larvae before the 4th instar are sprayed on the trees, and the medication can be seen in Zaojiao.