Scientific name Ceratovacuna lanigera (Zehntner) Homoptera, Polygonaceae. Alias ​​sugar cane powder, white peony, wax caterpillar. Distributed in East China, South China, Southwest, Taiwan and other sugar cane production areas.
Host sugarcane, white peony, orange, reed, Damangula grass and so on.
The characteristics of the damage are as follows. The scallops and the raccoon clusters suck sap on both sides of the back vein of the sugarcane leaf, resulting in yellowing of the leaves, stagnation of growth, short stature of the sugarcane plant, and a decrease in the sugar content. It is difficult to crystallize when making sugar. In addition, honeysuckle secretes honey easily cause soy disease. It is an important pest of sugarcane.
Morphological characteristics of the wingless female larvae body length 1.9mm, oval, yellow-brown to dark green or gray brown to orange, body color changes, head, chest, abdomen tight together, with 2 small horns at the front Suddenly, body covered with white cotton floc. Antennae 5, short, pale yellow. The winged females are 2.5mm long, long oval in shape, dark brown in the head and chest, abdomen and feet in yellowish-brown to dark green, translucent wings, 1 grayish black between front and front veins of the forewings Flea crickets; antennae 5, only 1/4 of the body length, 1-2 short and smooth; the center of the pronotum with quadrangle large breast tumor; abdomen tube ring, the body surface is not covered with wax. The wings of the winged nymphs are bare and well developed in the middle, with winged buds on both sides, white wax on the abdomen, and antennae 4-5. Without wings, white wax was found on the back and back of the chest and abdomen. The antennae were 4 sections and 4 instars. Life habits The southern sugarcane area has more than 20 generations of annuals, completes 1 generation of 14-36 days, overlapping generations. Females with winged fetuses were allowed to overwinter on gramineous plants or on autumn and winter planting sugarcane plants. The Hunchun stayed in the same place or moved to other sugarcane plants. He also gave birth to parthenogenetic females. Each female gave birth to 50-130 litters, and the colony fed and propagated on the back of the sugarcane leaves. Temperature 20-30 °C, relative humidity 70-90%, duration of wingless Ruoyu about 13.5-18 days; winged dragonfly flying strong, life 7-10 days. In Guangdong and Guangxi, winged beetles took place from the end of September to June the following year, and wingless cane toads occurred throughout the year. There were three migrations during the migration period: the first time in June from wintering to move to Daejeon; the second time was 8 - The field expansion in September; the third time in November was moved from a mature sugarcane plant to a wintering place or an autumn sugarcane field. Taiwan began to take place in October-November and March-April in the following year. Sugarcane is cultivated in a complex area and the climate is arid, which has caused it to turn to harm, and the population is vulnerable to spreading. Natural enemies have 13-star ladybugs, grasshoppers, and food flies.
Prevention methods (1) Adjust the layout of sugarcane planting and systematically determine spring planting, autumn planting and perennial sugarcane fields. Coupling as much as possible can reduce victimization. (2) In case of serious locust occurrence, timely irrigation. (3) Stripping the old leaf sheaths of sugarcane timely to improve the ventilation and light transmission conditions of the sugarcane plants. (4) Controlling spraying of 40% Dimethoate EC 1000 times or 50% dichlorvos EC 1500 times, 40% annihilation Multiple EC 1 000-1500 times when spring winged cockroaches migrate and during June-August. Liquid, 50% anti-inferiority WP 2000 times. (5) Taiwan should apply the above pesticides between February and March. (6) If necessary, use 40% Dimethoate EC 10 times before the formation of the stem section of the sugarcane seedling stage. Drop the drug droplets at the base of the seedlings with a rubber dropper. Drop 2ml per plant. Excellent control effect; also use 20% D Sulfoferpene EC 3000 times and 35% methylthiophosphorus EC 3000 times are better than Kangweiwei.
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