Scientific name Trigonotylus coelestialium (Kirkaldy) synonym T. Ruficonis Geoffroy Hemiptera, Lycosidae. Distribution in Beijing, Hebei, Inner Mongolia, Heilongjiang, Jilin, Liaoning, Shandong, Henan, Jiangsu, Jiangxi, Anhui, Shaanxi, Gansu, Qinghai, Ningxia, Xinjiang and other provinces.
Host crops such as cotton, wheat, millet, corn, sorghum, oats, rye, beets, and many grass weeds. In recent years it has been found that the damage to corn is serious.
Injury characteristics, nymphs sucking leaves sap or tender stems and spikes, the victim leaves early yellow spots, gradually become yellow-brown spots, the top of the leaves curled inwards, a serious death of the whole plant withered.
Morphological characteristics adults slender body, length 5-6mm, width 1-2mm, bright green or light green. The head is slightly triangular and the top protrudes forward. The center of the head has 1 longitudinal groove and the head does not reach the center of the head. The compound eye is silver-gray and hemispherical. Antennae 4 knots, equal to or longer than the body, red, so it is said to be blind. Section 4 Pronotum trapeze, with dark stripes, with an incomplete leading edge on the leading edge. The scutellum is yellow-green, triangular, and the base is not covered by the posterior border of the pronotum. The fore wings are slightly longer than the ends of the abdomen. The leather is green and the diaphragm is white and transparent. Foot light green or yellow-green, the end of the festival and the fiscal year dark. Egg-shaped pocket, about lmm long, 0.4mm wide, white transparent, egg cover with a protrusion. The 5th instar larvae were about 5 mm in length, yellow-green, red in antennae, slightly shorter than body length, and wing buds exceeding the third quarter of the abdomen.
Habits of life in North China for 3 generations, wintering eggs. The first nymph of the first year of the leap year entered the hatching period in early May and emerged in mid-May. The 2nd generation nymphs bloomed in mid-June and emerged in late June. The third generation of nymphs prospered in the middle and late July, and from late August to early September, females lay their eggs in weed stems and leaves throughout winter. The adult period of this worm is long, and there are overlapping generations. Each female lays 5-10 eggs. After the newly hatched nymphs stayed near the eggshell for a while, they began to feed. Adults are active from 9 a.m. to 17 a.m. and lurking on the back of the lower middle leaves of plants at night or on rainy days.
Control methods (1) Spray 16% of SF3 (chlorinated) EC 2000-3000 times or 2.5% Zhongbao 4 EC 1000 times during the occurrence period.
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