Scientific name Chilo auricilius Dudgeno Synonyms Chilotraea auricilia (Dudgeon) Lepidoptera, Acrididae. Distributed in the southern China rice area. Taiwan, Fujian, Hainan, Guangdong, Guangxi, Yunnan and Sichuan are all common. Jiangsu and Zhejiang also happened.
Host rice, sugar cane, sorghum, corn, millet and so on.
Injury characteristics of larvae from leaf sheath, leaf ear invaded, the first concentrated in the leaf sheath feeding, the formation of dry tip, and some into the stem, the formation of dry heart seedlings and white ear, larvae often turn plants damage, boring large, slightly Square.
Morphological characteristics Male moth body length 6.5-8.5mm, wingspan 18-23mm, tentacles slightly jagged. The forewings are brownish-brown, dark brown spots on the cloth, 4 dark brown patches with metallic luster in the center, and 7 small black spots on the outer edges. The hind wings are light yellow-brown with white margins. Female body length is 9.2-11.8mm, wingspan 23-28mm, antennae filamentous. The color of the fore-wing is similar to that of the male moth, and the mottle is lighter but thicker than the male moth, and the hind wings are similar in male and female. Oval flat oval, white to gray-yellow, eggs arranged in rows, 1-3 rows were scaly. The last instar larvae are 16-25 mm in length, with dark red to dark brown in the head, pale yellowish-white, with 5 brown vertical lines on the back, and the most lateral longitudinal line passing through the valve. Taiwanese rice larvae
5-7 years old. The larvae of the ventral toe hooks have a double-sequence full ring, and the outer toe hooks are slightly shorter, but they are dense with the inner ones and are different from the second ones.蛹 9-15mm in length; spindle-shaped, brown, and similar to the II larvae, but the frontal fovea is horny and prominent on both sides. There are 1 row of dentate small protrusions on the back and near the front edge of the 5-7 abdominal segment. There are 5 brown vertical lines on the back.
Habits of life in southern China for 3-6 generations, mostly wintering in larvae in rice bran or straw. The overwintering moth period in Guangdong is similar to that of the two pupa. The later generations were earlier than the second pupa, and in the middle of March, the adult larvae became phototaxis, and they liked to lay eggs on the thick green rice seedlings. In 6 blocks, there are more than 30 eggs per egg block, and up to 190 individual eggs. The newly-incubated larvae spit by the wind, and the larvae damaged in the leaf sheaths matured and then crawled to the outermost leaf sheaths. The larvae that had drilled into the rice stems moved to the 6-10 cm near the rice surface. A bit of a ring of feathering holes was bitten on the inner wall of the rice stem, leaving only ten layers of thin film, and then phlegm in the stem, and the adult eclosion ruptured the membrane.
The control method is similar to that of rice stem borer.
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