The scientific name Contarinia sp. belongs to the Diptera, Annodonidae. Alias ​​mulberry mosquitoes. Distributed in Guangdong. In the past, they were called mulberry mosquitoes. In order to avoid confusion with mulberry mosquitoes, they are now called mulberry midges.
The main sang.
The larvae are parasitized between the young leaves of the mulberry buds, and are used to contuse the top bud tissue and suck the juice. The top buds are often withered and wilted, become black and fall off, and the branches are capped. In severe cases, the mulberry branches are decentralized. Short and short, resulting in reduced production.
Morphological characteristics The adult body is about 2 mm in length and 5 mm in wingspan with 4 veins. Female adult antennae are 14 knots, the abdomen is large, and the spawning tube is long. Male adult antennae 26 sections, body thin. Tail claw claws, apparently thick. Egg length 0.12 to 0.2mm, long oval, like banana, colorless to light yellow. The larvae are sickle-shaped, 13 knots, and 1 knot is the head with a pair of stubby tentacles in front of the head and mouthparts between tentacles. Section 2-4 is the chest, and there is a "Y" sternum fillet on the ventral surface of the first thoracic symphysis, a 5-13 pelvic abdomen, and 4 tail vertebrae.蛹 Oblong, three pairs of chest feet are not flush, the middle one is the shortest, and the outer two pairs are gradually elongated. (right)
Living habits 3-4 generations in Guangdong, to the larvae of sacs, that is, dormant body in the soil of a l0cm at winter or over the summer. In mid-January of the following year, the mulberry sprouts lifted dormancy and phlegm when they sprouted. In the middle and late January, the larvae entered the stage of larvae damage, and they occurred one generation after another 25-30 days. In late April and early May, a generation of larvae was found in summer. There are many occurrences in the production of 2-3 generations, and the damage is heavier.
Control methods (1) After the summer harvest, sprinkle 3% methylisothiphos granules for 5~10kg per 1000m2, and also use 40% methylisotriphosin 0.3~0.5kg, mix with soil or sand. After the mulberry field, the cultivator turned into the soil. (2) Each generation of larvae is sprayed with 40% dimethoate EC or 80% dichlorvos EC and 50% phoxim EC 1000 times in the peak period.
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