Scientific name Ceroplastes japonicus Green Homoptera, Wax. Alias ​​Japan turtle wax oyster, date turtle wax oyster, turtle wax oyster. Distribution Hebei, Henan, Shandong, Shanxi, Shaanxi, Gansu, Jiangsu, Zhejiang, Fujian, Hubei, Hunan; Jiangxi, Guangdong, Guangxi, Guizhou, Sichuan, Yunnan.

There are more than 100 kinds of plants such as host tea, camellia, mulberry, jujube, persimmon, citrus, fig, mango, apple, pear, hawthorn, peach, apricot, plum, cherry, plum, pomegranate, and chestnut.

The traits of nymphs and female adults impede sucking and leaf sap, and excretion of honeydew often induces the occurrence of coal pollution, and weakens the branches of heavy trees withering.

Morphological characteristics Adult females grow with thick white wax shells, oval-shaped, 4-5 mm long, dorsal hemispherical bulge, high central bulge, surface with tortoiseshell-shaped concave lines, thick wax edge layer and curled by Eight blocks. The live insect wax shell was red on the back, and the edge was milky. After the death, the light red color disappeared. After the first light yellow, the insect body appeared reddish-brown. Live insects are pale to purple. Male body length 1-1.4mm, light red to purple red, black eyes, antennae filamentous, wing 1 white transparent, with 2 rough veins, small and small, the end of abdomen slightly thin, sexual stab light. Egg oval, 0.2-0.3mm long, pale yellowish-orange. Nymph larvae hatched 0.4mm long, oval-shaped flat, reddish-brown, tentacles and feet well-developed, gray-white, abdomen not l long hair. One day after fixation, the wax was secreted, wax shells were formed 7-10 days, and there were 12-15 wax horns around. In the late stage, the wax shell thickens male and female morphological differentiation. The male and female adults are similar. The male wax shell is long and oval, with 13 waxy horns like starbursts around. Spindle-shaped, long lmm, brown, spiky pen tip. (left)

Life habits are born on the 1st generation. Fertilized females live mainly on 1-2 year old branches. The host of Hunchun began to injure when it germinated, and the body quickly expanded and spawned under the abdomen after maturation. Spawning period: Nanjing in mid-May, Shandong in mid-June, Henan in mid-June, Shanxi in mid-late June. Each female produces more than 1,000 eggs and more than 3000 eggs. The egg period is 10-24 days. The newly hatched nymphs climbed onto the shoots, petioles, and foliage for feeding. In early August, the male and female began to differentiate. From mid-August to September, the male and female pupa period was 8 to 20 days, and the eclosion period was to late August. In early October, adult males lived for 1-5 days and died immediately after mating. The females were successively injured by the leaf to the branches, and they were overwintering after autumn. Possible parthenogenetic reproduction, offspring are all male. Natural enemies include ladybugs, grasshoppers and parasitic bees.

Prevention methods (1) Quarantine and disinfection of seedlings, scion, rootstocks. (2) Protecting natural enemies. (3) cut off pests or brush insect body. (4) When icing or smog on the branches in winter, the branches are beaten with wooden sticks, and the worm body can fall with ice. (5) Spraying diesel oil emulsion with 10% oil content just before deciduous or germination, if mixed chemical agents are better. (6) Control and control of newly hatched nymphs in the dispersal and transfer period.

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