The scientific name Scotinophara horvathin Distant is Hemiptera, Melodaceae. Distributed in Sichuan, Shaanxi, Hubei, Hunan, Hebei and other places.

Host corn, wheat, upland rice.

Harmful characteristics Nymphs and adults suck sap at the base and roots of corn stems. After the 2-3 leaf maize seedlings are damaged, the heart leaves are wilted, the leaves turn yellow, and the plants die. In the 5-10 leaf stage, the leaves appear to have holes, the growth points are stimulated, the new leaves are curled, thick, wrinkled, and longitudinally cracked, and the plants are dwarfed, twisted, and shrewd. After the jointing, the corn was lightened.

Morphological characteristics Adult male body length 8-9mm, female 9-10mm. The head is black and the front end is slightly notched. The prosthodontic plate, scutellum, and forepaw are dark yellow. The middle of the hind foot festival is brown and the rest of the body is black. In the center of the pronotum there is a thin yellowish-brown longitudinal line. The front corner of the prosthodontic plate is long and slightly curved, pointing to the front, with its lateral corner protruding out of the body and the end slightly bent downwards. The end of the scutellum is away from the end of the abdomen, with a small yellow spot on each of the two base angles. The body wall is covered with black spots, with fine hair on it. Because the adult body is densely short-skinned, the adult collected in the field is often covered with mud and is dark brown in color. The female worms are blunt at the end of their abdomen and the males have a pair of protrusions protruding rearward. Egg height is about 1.1mm, diameter is 0.9mm, cup shape, egg cover uplift. The first gray-green or blue-gray, then turned dark gray, dark purple before hatching. Nymphs have a body length of 1.8-2.0mm. The back of the abdomen protrudes like a small ladybug with pink spots on it. The middle of the head is longer than the lateral leaves and the ends are slightly wider than the lateral leaves. Two-year-old body length of 2.0 to 2.2mm, like age. The middle lobe is longer than the side lobes, but the front and side lobes are equal. The three-year-old is about 5.5mm in length and dark brown in color. The middle of the head is nearly equal in length to the front of the lateral leaf. Wing buds are visible. The fourth-instar body is about 5.5mm long, yellow-brown or dark brown. The middle part of the head is slightly narrower and slightly shorter than the side leaves. The wing buds are short, beyond the lateral margin of the chest. The fifth-old body is 6.5mm long and seems to be four years old. The middle part of the head is slightly shorter than the side leaves and is approximately half as wide as the lateral leaves. The last age (including four, five, six years old) nymphs, body length 6.5-7.5mm, body color like four instar nymphs. The middle part of the head is shorter and narrower than the side parts. Wing buds extend to the back of the third quarter of the abdomen.

Life habits are born 1-2 generations. Adults, nymphs are allowed to overwinter in corn roots, stem bases, under weeds, in loose soil, or to feed on wheat fields. The spring temperature rises and activity begins. Adults and nymphs live on the base of corn in the soil surface, and are afraid of light. Adults have wings but no flight. The females lay eggs under the top soil clods, with 5-10 capsules per egg. The first generation egg was in May and the second generation was in August. The egg period is 5-12 days, the nymph period is 41-100 days, and the adult period is 60-250 days.

Control methods Before the emergence of corn to 5 leaves, use 5% cyanocyanine EC or 50% phoxim, 5% beta cypermethrin, 2.5% Baodi EC 2000-3000 times solution or 35 times SF 2 EC 1000 times Liquid, 10% cypermethrin 2000-3000 times litter. When sowing seed can be used at the time of sowing, 667m2 with 3% carbofuran 2-3kg or 5% aldicarb 1kg or 15% iron eucalyptus 250-300g point application, can also treat other pests, but eating tender corn, sweet corn Prohibited from use.

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