The scientific name Mocis undata (Fabricius) is a Lepidoptera, Noctuidae. Synonyms Cauninda undata; Noctus undata; Ophiusa mayeri; O.subaenscens; O.velata; Phalaena archesia; Remigia jugalis; R. pellita. Alias ​​is known as Spodoptera littoralis and Mothcoptera. Distributed in Hebei, Henan, Jiangsu, Zhejiang, Jiangxi, Fujian, Taiwan, Guangdong, Yunnan; Africa, Japan, North Korea, India, Sri Lanka, Myanmar, Singapore and so on.
Host soybeans, fish vines and so on.
The larvae damage the larvae in the upper part of the plant to damage the petiole or the leaves become nicks or holes. When the larvae are severe, they eat the leaves and cause the soybeans to fall and fall, affecting the yield.
Morphological characteristics Adult body length 18-22mm, wingspan 46-50mm. Head and chest, dark brown front wings. The inside of the fore wing is coarse, with a brown outer slope. The outer side of the tip has 1 black spot, the middle line is brown and wavy, the outside line is black, and the ring line is a brown dot. The inward fold is obvious at the Cuz pulse, reaching the posterior border of the kidney, with large kidneys. Gray-brown, sub-line brown, wavy, with black spots between the veins, black end; dark yellowish hind wings, dark brown outside, with a brown spot in the middle of the outer edge of the wings. Eggs milky to grayish green, semicircular, 1mm in size. The last instar larvae are 50-57mm long, slender, with 3 pairs of thoracic feet, 2 pairs of gastropods, and 1 pair of tailfoot. The head is tan-brown, with a slight vertical streak on the abdomen, yellowish-yellow on the abdomen, sub-half-line, and purple-brown line on the valve line. It has a yellowish-white eye-shaped spot on the back of the first abdominal portion. Body color changes. The dragonfly is 20-24mm long and 5-6mm wide, yellow-brown to reddish-brown. Body surface with white powder.
Living habits 3 generations in Shandong, one generation occurred in July to injure spring soybeans, and the second generation took place from mid-August to early September. The damage occurred to summer soybeans. The third generation took place from mid-September to early October, and was damaged by the second generation. Heavy, Zhengzhou, Henan Province was seriously affected in mid-July. The larvae are sluggish and have the habit of eating egg shells, and the last instar larvae are spit-deposited.
Control methods see bean leaf roller moth.
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