Scientific name Teleogrylus mitratus Burmeister Synonyms Gryllus testaceus Walker Orthoptera, Polygonaceae. Alias ​​yellow oil gourd, brown earthworms and so on. Distributed in Beijing, Hebei, Shandong, Henan, Anhui, Jiangsu, Shanxi, Guangxi, Guizhou, Yunnan, and Tibet. Host Rice, corn, sweet potato, wheat, peanuts, sesame, cabbage, melons, beans, cotton and other crops. Damage characteristics Damages to the roots, stems, leaves and seedlings of fruit trees, vegetables, and various crops caused by adult and nymph pests may cause death. Morphological characteristics Adult males are 26-27mm long and females are 27-28mm; female and male forewings are 17mm long. Large, yellow-brown, body color and characteristics of this species similar to the Beijing oil gourd, its characteristics are: large body, the top of the head does not bulge than the front edge of the thoracodorsal plate, the front edge of the back plate is connected with the two compound eyes, and the “eight†shape is weak. Not obvious. The pronunciation mirror is roughly circular, with a large curvature of the front chest and a V-shaped notch at the end of the mid-chest and the web. Eggs are long and tube-shaped, slightly pointed at both ends, yellowish milky white. A total of 6 instar nymphs, like adults, no wings or wing buds. Habits One year old in North China, wintering at 2-3cm in the ground. Hunchun is hatched from April to May, and adult animals bloom from July to August. Adult nymphs are active at night. From late September to early October, females lay eggs at the camping earthen acupoints, which are prolific in the sunny sections of rivers, ditches, ridges, cemeteries, and other weeds, and are about 2-4 cm deep. Each female produces 34-114 eggs. Adults live on an average of 64 days, and the elderly have more than 200 days, but die 1-8 days after spawning. The male insects are good at attracting females, and they are good at fighting. Chang Chi points live with females. Nymphs and adults usually stay in dark places, and they plunge into the lights at night. Omnivorous, but particularly like crops with oily and aroma, such as soybeans, sesame seeds. Control methods (1) poison bait trapping. Firstly dissolve 90% trichlorfon crystal into 30 times liquid (50g of medicine to 1.5kg hot water) with 60-70°C hot water, and mix 30-50kg of sauteed Memaifu per kg of liquid solution. Bean cakes or cottonseed cakes, when fully mixed with water (1 to 1.5 times the weight of the bait), with a hand to a little bit of water for the degree, and then withdraw from the field. (2) Light trapping adults. (3) Pile up weed traps and then kill them. (4) Plowing after the fall or early spring, burying the eggs in deep layers so that they cannot hatch. (5) Timely weeding decreases. (6) If necessary, spray 1.5% parathion or 2.5% trichlorfon powder on the ground.
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