The scientific name Asphondylia ervi Rubsamen is Diptera, Gryllidae. Alias ​​soy flies. Distributed in Shandong, Beijing, Anhui, Jiangsu, Hunan and other provinces and cities. Host soybeans. The traits of larvae damage the pods, cause twisting and twisting, cause the slow development of bean pods, damage the worms at the victim's site, and cause severe pods to fall off. Living habits 3 generations in the Jiang and Zhejiang regions. Adult adults in Nanjing emerged after May. In June, they attacked spring soybeans. In August, Henan suffered heavy soybean damage. Adults prefer to lay their eggs under calyx or withered flowers. Larvae infest the larvae after hatching. The larval period is about 20 days. After being cooked, the quail is bred in the pupa and the pupa period is 9-10 days. Before the eclosion, a round hole is drilled with the tip of the head and the bean pod is drilled. When the pupa emerges, the pupa shell is brought out of the quail, and the adult worms move at dawn. Or inhabiting under the plants during the day, adults have a strong selective for spawning. They like to lay their eggs on the pods with many hairs. Generally summer sowing soybeans are vulnerable and late-maturing varieties suffer heavy damage. Control methods (1) Select a few varieties with bean pods and hairs, sow them at an appropriate time, and avoid the spawning and damage of the insects. (2) If necessary, spray 10% imidacloprid WP 1500 times or 25% iccas 1500 times, 1.8% edotin 3,000 times, and spray 55L per 667m2.
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Morphological characteristics Adult body length 3.2-3.5mm, deep purple black, antennae filamentous, brown, grayish-brown forearm, gray-black hairs, 3 longitudinal veins on the wing of the wing, double fins alternately pleated on the back of the body Balance bar light yellow slender. The chest is slender, and the abdomen is pointed at the tip of the abdomen, and the spawning tube is slender. It only protrudes from the time of spawning. The male has a pair of pliers-like grippers. Eggs oblong, milky white. Larvae body length 2.5-3.0mm, body flat, light yellow, abdomen 8 knots, abdomen and back after the 2nd section all have small teeth transverse thorns. It is brownish-red, with 1 pair of dark brown prongs on the head and a row of horizontal thorns on the distal section. (right)