Beans Beans

Scientific name Epicauta gorhami Marseu1 Coleoptera, Phasianaceae. Alias ​​white bar turnips, sawtooth bean turnips. Distribution of Heilongjiang; Inner Mongolia, Xinjiang, South to Taiwan, Hainan, Guangdong, Guangxi.

Host soybeans, kidney beans, kidney beans, broad beans, potatoes, tomatoes, eggplants, peppers, leeks, leeks, etc.

The traits of adult pests are clustered and a large number of leaves and petals are taken, affecting fruitfulness.

Morphological characteristics Adult body length 10.5-18.5mm, width 2.6-4.6mm; body and foot black; red head, with a pair of bright melanoma, sometimes the inner side of the near compound eye is also black; the anterior thoracodorsal The center of the plate and the center of each elytra wing have a wide vertical line composed of gray-white hairs. The small scutellum, the flank margin, the end edge and the midline, the ventral side of the chest, and the leg joints and gut sections are all white hairs. The most dense, there is a wide horizontal stripes composed of white hairs at the back edge of each abdominal joint; the antennae are black, and the base portion is red in 4 sections. The antennae of the male antennae were 3–7 knots flattened, strongly broadened to the outside, jagged, each with a vertical groove, and the grooves in section 7 were sometimes shallow and inconspicuous; the antennae of females were filamentous; the length of the anterior chest was slightly larger It is wide, parallel on both sides, and is folded forward from the front end l/3. There is a vertical concave pattern in the center of the panel, and a triangular socket in front of the trailing edge. The male legs were covered with golden hairs on the ventral surface of the forefoot and the ventral surface of the gut. The base of the first metatarsal was thin and rod-shaped. The abdomen was strongly broadened and abruptly turned toward the lower end. The ends of the females were not significantly widened. Egg oval, about 3l (mm) in size; yellow-white, smooth surface; 70-150 eggs constitute a chrysanthemum-like egg mass. The larvae were complex and different in morphology in different instar larvae. The first instar larvae resemble two-tailed worms, dark brown in color, well developed in their thoracodorsis, and have three claws at the end; 2-3, 4 and 6 instar larvae resemble umbilical hernias; 5th instar larvae are pseudocones, all covered by a thin film, smooth Hairless, breast papules mastoid. Approximately 15mm long, yellow-white, compound eye black; 9 long thorns on the lateral and posterior borders of the pronotum; 1~6 abdomen posterior margin with a row of thorns, 6 left and right; 7-8 abdominal Each of the five left and right sections. The wing buds reach the abdomen in section 3.

Life habits occurred in 1 generation in North China and 2 generations in Hubei. All of them were wintered in 5th instar larvae (pseudo-cockroaches). The cicada cicada developed into 6th instar larvae and developed into pupae. In the first-generation area, larvae were decomposed in mid-June, and adults and damages occurred from late June to mid-August. Adults in the second-generation areas appeared from May to June. They focused on early sowing of soybeans and then transferred to vegetables such as eggplants and tomatoes. The first generation of adults emerged around mid-August, and caused damage to soybeans. They were transferred to vegetables from late September to early October and the number of occurrences was gradually reduced. Adults are active during the day, especially in the noon, and they are gregarious. They like to eat young leaves, heart leaves and flowers. Adults often escape quickly or fall into hiding, and secrete a yellow liquid containing phthalocyanine from the ends of the legs. Touching the skin can cause swelling and blistering. The mating of adults began 4 to 5 days after mating. The mating females continued to feed for a period of time. After that, they dug a 5 cm deep, narrow mouth and wide inner earth hole to lay eggs. The eggs were produced at the bottom of the hole and the mucus was connected to the tip. , arranged in chrysanthemum. Then use the soil to seal off. Adults live 30 to 35 days in Beijing and 18 to 21 days in the egg period. The hatched larvae climb out of the soil caves and move quickly. They are scattered to search for larvae of the locust eggs and larvae in the soil. If they do not eat, they die within 10 days. The 4th instar larvae had the highest food intake, and 5-6 years did not need feeding.

Control methods Winter plowing can eliminate part of the overwintering pseudobugs. Adults can use broad-spectrum insecticides at the adult stage and be effective at conventional concentrations.

Photodynamic Panel

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