Scientific name Sucra jujuba Chu Lepidoptera, Geometridae. Alias ​​Zabuqu. Distribution Hebei, Shandong, Shanxi and other places.
The host mulberry, jujube, apple, pear tree and so on.
The larvae attack the mulberry leaves and saplings to form holes or nicks, and the leaves are eaten in severe cases.
Morphological characteristics adult male and female. Male body length 10-15mm, wingspan 30-33mm, gray-brown, orange-pink antennae antennae, fore-wing, outer line dark brown wavy, midline color is not obvious; hind wings gray, black wavy outside. There is a dark gray spot on the front and rear wings of the chamber. Female body length 12-17mm, was gray-brown scales, no wings, small head, antennae filamentous, gray foot black, white ring with zygomatic stipe 5, abdomen cone, tail with black scales a bundle. Oval oval, smooth, shiny, long 0.95mm. After light green, it turns brown. The larvae have a body length of about 45mm and the service department is gray-green. There are multiple black vertical lines and gray-black patterns. Three pairs of chest feet, one pair of abdominal feet and one pair of hip feet. The young larvae are black, and the service department has 6 white ring patterns. The dragonfly is 10-15mm long, spindle-shaped, greenish green, yellow to reddish-brown afterwards, hip spines more pointed, and ends dichotomously bifurcated with 1 small projection on each side of the base.
Life habits are born on behalf of the l generation, a small number of diapause diapause 1 year and 2 years l generation. The beak was overwintered at 5-10cm in the soil. In late March of the following year, the average temperature was above 7°C for 5 consecutive days. When the 5cm soil temperature was higher than 9°C, the adults began to emerge. In early spring, the rain began to take place. The soil was dry and unearthed delayed and scattered, and some were delayed for 40 to 50 days. After the female moth emerges, it inhabits at the base of the trunk or on the soil block, in the weeds, climbs to the tree at night, etc. The male moth flies to mate and the male has a phototaxis. Eggs are prolific in the rough skin or in tree shrews. Each female can lay up more than a thousand grains, and the egg period is 0 to 25 days. Generally, when Mulberry sprouts, it begins to hatch. A total of 5 larvae, about 30 days in duration, larvae can be drooping silk, from the end of May to early July, the larvae gradually matured into the soil more and more summer and winter.
Prevention methods (1) Mulberry leaves in the fall. (2) A plastic film with a width of about 10 cm is bundled at the base of the trunk, the lower part of the film is compacted with soil, and 2.5% phoxim powder or 2% batafen powder or 2.5% trichlorfon powder is scattered around the membrane. 667m2 2kg, prevent adults from growing on trees and poisoning adults and newly hatched larvae. (3) Apply butter or used motor oil to the film to stop the larvae from growing on the tree. (4) Shake and kill larvae. (5) This worm is particularly sensitive to pyrethroid insecticides, so its control effect is excellent. Optional 2.5% Kung Fu EC 4000 times solution or 20% ZhongshiJu EC 3500X, 20% Xerox EC 3500X, 5% Leflux EC 4000X, 2.5% Dichloric Emulsion 3500 times liquid; 50% can also be used to kill pine oil 1000 times. (6) Use Bacillus thuringiensis to add water to the bacterial liquid containing 0.1-0.25 billion spores per ml. Spray it at the larval stage. For example, the effect of trichlorfon added one hundred ten thousandth of the bacteria liquid will be obviously improved.
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