The scientific name of the genus Occhyrotica concursa Walsinghan is Lepidoptera. Alias ​​sweet potato brown feather moth, round bird feather moth, sweet potato bird feather moth, Taiwan round-wing bird feather moth. Distributed in Southeast China, South China, Taiwan and other places.
Host sweet potato.
Injury features: Newly hatched larvae infiltrate unexpanded young leaves, and some spine rolls the potato leaves into insects, hides them and feeds them, leaves the epidermis on the affected leaves, and is severely incapable of spreading, that is, dead. Indentation or vestigial marks left at the base of the veins, and some of the food into nicks or holes.
Morphological characteristics Adult body length 6mm, wingspan 15mm, body and hind wings yellow-brown, grayish yellow front wing, near outer edge with brown spots, the angle is curved hook. The forewings and hind wings are not branched, and there are no feathery Scales on the wings. Eggs are oval and light green. The last-instar larvae have a body length of about 9 mm, green, and a red line on the dorsal line. There are many small tumors on the body section, and the fine and short bristles on the tumor. The dragonfly is 8-9mm long, dark green, with a sharp spine and a purple-brown dorsal line.
Life habits Southeast China, South China 7-8 years old, 12 generations in Taiwan, the last instar larvae at the base of the potato leaf veins or semi-coiled potato leaf thin silk pupae, pupal period of 8-20 days, after the emergence of adults happy Hidden under thick potato leaves, the fore wings are flat at rest, and the hind wings are gathered under the forewings. After mating, the eggs are laid on the back of the leaves and the eggs are 6-19 days old. The larvae harm young shoots of sweet potato, and the larval period is more than 20 days. During the 20-20 days of the flood season, adult life span is more than 10 days, and it can be as long as 40 days.
The control method refers to sweet potato white feather moth.
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