Camellia oleifera

Scientific name Buzura suppressaria Guenee Lepidoptera, Polyporidae. Alias ​​large scales, scale insects, tung tree feet moth, firewood, insects and other cards. Distribution Anhui, Jiangsu, Zhejiang, Jiangxi, Hubei, Hunan, Sichuan, Guizhou, Guangdong, Guangxi, Fujian and other provinces. Host tea, tung tree, small walnut, persimmon, red bayberry, pear, lacquer tree and so on. The characteristics of the larvae are as follows: The larvae feed on the leaves or holes and eat the leaves seriously, causing the upper shoots to die, seriously affecting the yield and quality.

Morphological characteristics adult female adult body length 24-25mm, wingspan 67-76mm. Antenna filamentous. Body wings gray, dense gray black dots. Irregular tanish wavy stripes on the baseline of the fin baseline, midline, and submarginal margins. The outer edges of the wings are wavy, with yellow-brown ciliate. Yellow and white foot. The abdomen ends with yellow hair. Male body length 19-23mm, wingspan 50-61mm. Antennae feathery, yellow-brown. Wing baseline, sub-margin line gray and black, abdomen tapered. Other features are the same as female moths. Eggs 0.7 to 0.8 mm long, oval, blue-green, black before hatching. Constant hundred to one thousand grains gathered in a pile, covered with yellow hair. The last larvae of larvae are 56-65 mm in length. The newly hatched larvae are 2mm long, gray-brown, and the dorsal line and valve line are white. Body color changes with the environment, dark brown, grayish green, blue green. The head is densely covered with brown, granular dots, with a central depression in the center of the head and horns on both sides. On the back of the chest, there are two protuberances. The ventral surface is gray-green and is different from the cloud-scale. The abdomen of the eighth section of the abdomen is slightly projected, and each section of the chest and abdomen has granular dots and the valve is purple. Long 19-27mm, conical. There is a pair of small dark brown protrusions on the top of the head, and the wing buds reach the posterior edge of the fourth abdominal segment. The hip spine is obvious, the base is swollen, bumpy, and acicular at the end.

Life habits Anhui, Hunan 2 generations of old, Guangdong 3-4 generations. The wintering of earthworms in the earth and the emergence of adult eggs in April. The generation period of adults is very much related to the early spring temperature, and the temperature is higher in the early period of the moth. The lifespan of adult Changsha Changshan population is 6.5 days and the second generation is 5 days. The egg period is 15.4 days and the second generation is 9 days. The larval period is 33.6 days and the second generation is 35.1 days. The puerperium generation is 36 days.蛹 195 days. The lifespan of adults in Jude, Guangdong is 3-6 days, the egg period is 8-17 days, the larval period is 23-54 days, and non-overwintering is about 14 days. Adults are often feathered at night and inhabit the trunks of tall trees around a tea plantation or on the walls of buildings during the day. After being frightened, they fall to the ground to make a phototaxis. After the emergence of adult eclosion, they copulated on the night and spawned on the evening of the next day. The eggs were prolific in the gaps between the trunks of the tall trees around the tea plantations or between the branches of the tea bushes. Each female produces more than 2,000 eggs, up to more than 3,700 grains, finished in 3-4 times. The hatching rate of eggs is above 98%. The larvae crawled to the upper part of the tree after hatching, and drooped and drooped by the wind. Larvae are 6-7 years old. Hi feeding in the evening or early morning, the young larvae only take the upper epidermis or leaf of young leaves and leaves, making the leaves a reddish-brown focal spot. After 3rd instar, they bite into the nicks from the tips of the leaves or leaves, and 4 instars. After a large increase in food intake, each mature larva eats a leaf area of ​​60 to 70 cm2 per day. After 3rd instar, the larvae fear the light, and the strong sunlight at noon often hides in the branches and leaves of the tea bushes. After matured into the soil 3 - 5cm in a radius of 30cm from the root building chamber phlegm. Natural enemies have black egg bees and parasitic flies.

Prevention and control methods (1) deep plague. See method for tea. (2) Artificial control 1 Artificial digging occurs in the severe tea plantation during the flood season. (8) According to adult habits of inhabiting tall trees or buildings and being frightened after landing, artificial swatting in the early morning of each adult stage is also an important measure to control the size; 2 eggs are concentrated in the bark of tall trees. Between gaps, the egg mass can be manually scraped after the age of the adult. (3) Mastering the spraying of tea trees near tall tea trees and their surrounding tea bushes at the end of the incubation period. The dosage of tea seedlings should be referenced, but the concentration must be increased. (4) The light moth attracts adults every night during the peak period of adult emergence. (5) Promote the use of tung oil nucleus polychaete nucleopolyhedrovirus, with 250 billion polygons per km2, and 140 liters of water, spraying at the peak of the first generation larvae at the age of 1-2 (equivalent to 1.410 8 polyhedra/ml) The current mortality rate of larvae was 80%, and the effect lasted for more than 3 years.

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