The scientific name Rondotia menciana Moore is lepidoptera, silkworm moth family. Alias ​​silkworm, white silkworm, white peony, pine flower silkworm and so on. Distribution of Jiangsu, Zhejiang, Anhui, Shandong, Henan, Hebei, Shanxi, Shaanxi, Gansu, Hunan, Hubei, Jiangxi, Sichuan, Guangdong and Northeastern provinces.

The host mulberry, pipa, pipa and so on.

It is characterized by larvae eating leaf measles on the back of the leaves, feeding on holes of different sizes, and leaving only severe veins.

Morphological characteristics Adult body length 9.5mm, wingspan 35-40mm. Body yellow wings. Compound eyeball, dark brown. Tentacle-shaped, brown. The back of the chest and abdomen has tan hairs. The fins of the fins protrude outwardly and are concave in the lower direction. There are two dark brown wavy lines on the lateral and internal horizontal lines, and dark brown and short longitudinal lines on the middle chamber. Female belly belly mask brown black hair. Egg oval, flat, size 0.70.6 (mm), non-overwintering egg colostrum white, pink before hatching, no covering on the egg mass, called uncovered egg mass. The overwintering egg covers brown hair, which is called covered eggs. The last-instar larvae have a body length of 24 mm, a brown head, a milky white chest, wrinkles in various body sections, dark spots between wrinkles, and disappearance of dark spots after aging. Abdominal eighth abdomen section back with 1 brown black hip angle. Milky white, cylindrical, compound eyes, valve tea brown. Yellow, oval, loose silk.

Habits Mulberry differs from one generation to the next in algebra, with one generation, two generations, and three generations. The wintering of branches or stems is done with beneficial egg pieces. The north is mostly a generation, and Zhejiang is mostly second-generation. The first-generation larvae hatched in late June and were called head wax. In mid-July, they larvae and spawn after mating in late July. At this time, the first-generation moths produce cover eggs that cover the winter. Second-generation and third-generation female moths continue to grow without laying eggs. In early August, enter the second generation larvae hatching period, generally known as two wax, late August phlegm, early September eclosion spawning, second generation quail eggs are produced through the winter, three generations of oyster production without cover eggs continue to develop . The third-generation larvae hatched in mid-September, known as Sancha. They larvae in the early January, and overwintered after they emerged in late October. The adult eclosion was favored during the day, and the uncovered ovum was produced on the back of the leaves, and individual vines were produced on the shoots. Covered eggs are prolific in the mulberry stems, branch stems or annual branches, egg mass production, there are eggs covered eggs 120-140, no eggs covered eggs 280-300 tablets. The larvae prefer to hatch in the morning, the newly hatched larvae feed on the leaves, and then bite the leaves. After the first and second generation larvae matured, the larvae of the third generation larvae and metamorphosed on the leaves, and the third generation larvae pupaed on the branches, and the pupa period was 6-17 days. The natural enemies mainly include mulberry black egg bees, mulberry polyomas, sang yam parasites, and the majority of leg bees.

Prevention methods (1) Manually scrape eggs in the winter, pick mulberry leaves in summer and autumn, and pay attention to killing fleas. (2) During the incubating period of each generation of larvae, extinction, that is, extinction in the late June, extinction in early August, extermination of three crosses in late September, and timely spraying of 80% dichlorvos 1000 times solution or 90% crystal trichlorfon 1500 times liquid, 50% dibromophosphorous oil 1200 times, 50% phoxim EC 1000 times. (3) Apply 48% chlorpyrifos (Loss Ben) EC or 44% Dimethoate 20-50 times to dry.

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