Clostera anachoreta (Fabricius), belonging to the family Lepidoptera.
[Distribution and Hazard]:
Distributed from Heilongjiang to Fujian (North Central), Jiangxi, Hunan, northern Guangdong, Yunnan (Kunming), Ningxia, Gansu and coastal provinces. Harm to Yang and Liu. The larvae are concentrated in the leaves at the age of 3, and the leaves are eaten in the inner mouth. After 3 years of age, the whole leaves are scattered and eaten. When the larvae are severe, the leaves can be eaten.
Morphological characteristics:
Adult: Female body length 15 - 20mm, wingspan 38 - 42mm, tentacles single dentate. Male body length 13 - 17mm, wingspan 28 - 38mm; tentacles single dentate; light gray brown, a nearly oval black spot on the top of the head, the front wing is grayish white, the top corner has a dark brown fan-shaped large spot, the outer horizontal line There are 1 row of yellow-brown rust red spots in the outer spot, about 3-5, and there is a large dark spot on the inside, and the rear wing is taupe. There are 4 gray and white stripes on the wings.
Egg: semi-oblate, 0.9mm in diameter. It is orange-yellow at the time of initial production and turns purple in near-incubation.
Larvae: The mature larvae are 32-38 mm long, with a dark brown head, light brown or white fine hair on the body, grayish yellow-green on the back, and a jujube large sarcoma on the back of the 2nd and 8th abdomen. The base edge is black with one white point on each side; each section has 8 orange-red small sarcomas arranged in a ring, and the hair has long hair. The whole is finely white.
蛹: Body length 13 - 18mm. Brown, hip spine ends.
茧: oval, grayish white.
[living habits]:
Liaoning and Gansu have 2 to 3 generations in 1 year, 4 to 5 generations in North China, 5 to 6 generations in East China, and 8 generations in Hainan Island. Overwintering in the topsoil, bark seams and dead leaves with sputum knots. Adults emerged in March and April of the following year. Adults come out at night and have a strong phototaxis. After the mating, the eggs are laid on the same day, and each female lays 100-600 eggs. The egg is usually produced on the back of the leaf, and the newly hatched larvae are clustered. When they are at rest, they are arranged in one direction. The 1st and 2nd instar larvae feed on the lower lobe of the leaves, leaving only the epidermis and veins. The 5th instar larvae are the largest. , accounting for about 70% of the total food intake, larvae molting 4 times, a total of 5 years old, larval stage about 33-34 days, old mature larvae in the leaf rolling thinning phlegm and phlegm, in addition to wintering pupa in the flood season, generally It is 8 days.
[Control methods]:
1 Artificial removal of insects to eliminate the source of insects plays an important role in lowering the late damage. 2 Spraying 20% ​​diflubenzuron suspension 7000-10000 times liquid in the young larvae, and mastering 90% crystal trichlorfon in the generation of larvae, 50% killing pine oil 1000-1500 times. 3 protect the use of natural enemies. In the egg stage, Trichogramma can be released, and the larvae can be sprayed with biological agents such as Beauveria bassiana, Penicillium or granular virus. Trichogramma closterae, Telenomus sp., Caterpillar Exorista amoena, Apantale sp., Brchymeria cbscurata, Granulosa virus GV, Ashes Bird sturnus cinerceus and other natural enemies. For example, caterpillar chasing flies is a predator of its dominant species. Granulosis virus is an important factor in controlling its occurrence. The release of natural enemies such as Trichogramma and black bee has a certain inhibitory effect on the occurrence of the moth, so we must pay attention to each generation. Eggs and larvae are rationally used in the period of occurrence, and selective pesticides are applied to exert the harm caused by the natural enemy to jointly control the occurrence of the boat moth.
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