Scientific name Aleuro10bus marlatti Quaintance Homoptera, Fructus. Alias ​​orange mealybug, orange round mealybug, citrus thornless mealybug, Markov powder. The distribution is basically the same with blackthorn.
Host tea, oil tea, citrus, fig, hawthorn, pear, peach, grape, persimmon, chestnut and so on.
Damage characteristics with black thorn whitefly.
Morphological characteristics Adult body length 1.2-1.3mm, orange, brown markings. Compound eye red, upper and lower separation of 2 pairs; monocular 2, born in the compound eye upper edge; antennae bristle-like 7 section, pale yellow. Wings are translucent white, with irregular brown markings on the cloth, and white wax powder on the wing surface; each of the front and rear wings has a longitudinal vein. The first, second, fifth, sixth, and seventh abdominal segments have brown bands at the posterior border; the first nine are large, with a concave dish-like hole on the back, and the back plate and the first tubular anus in the middle of the 10th segment. The lower part said that the lingual process was longer and the cover was larger. The males are smaller, with 2 spore grips and upwardly curved penises at the end of the abdomen. At the end of the abdomen, there are three genital valves in females: 1 back genital process and 2 lateral genital processes. Egg oval, 0.22 to 0.23mm long, with a short handle at the base, erect leaves attached, smooth egg shells. Primary yellowish green, pale greenish brown before hatching. The larvae were hatched 0.25mm long, oval, yellowish green. Antenna filamentous 4 sections; full-featured and short-breeding can crawl. After immobilization, it was fixed like aphids, its body turned brown, its antennae and feet were degraded, white waxy substances were secreted around the body, and 16 pairs of small protrusions were formed around the periphery of the abdomen, and long and short bristles were born. With age, white waxy material around the body increased. The initial body length of about 3 years is about 0.6mm, and the body length is similar to the length of the oyster shell at the time of aging.蛹 Oval, female 1-1.2mm, male 0.81-lmm long, black shiny, all without hair, body back more wrinkles; shell around the edge of a white needle-like mans wax, wire around Transparent.
Habits are about 3 generations old, mostly wintering on twigs of 2 instar nymphs on 1-2-year-old tea or deciduous fruit trees. After the host germinates, it continues to injure, phlegm and feather. The generations of adults in each generation are generally: the wintering generation around the middle of May; the first generation around the beginning of July; the second generation around the middle of September. The third generation of nymphs is wintering. Adult habit with black sting whitefly, eggs scattered in the back of the leaves, l leaves can produce dozens of eggs. The newly hatched nymphs find a suitable place to stand still and do not transfer. Non-overwintering nymphs climbed to the back of the leaves, and winter nymphs climbed onto the branches of the year. The escuta shells often stayed on the back of the body and fell off as soon as possible. When the third instar matured, the body wall hardened and did not fall off and became a pod. In the internalization. Natural enemy with black thorn whitefly.
See black locust powder for control methods.
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