Tea Tree Teacup Breastplate A
Scientific name Basilepta melanopus Lefevre Coleoptera, Phylloidea. Distribution of Fujian, Jiangxi, Hunan, Hubei, Guangdong, Guangxi and other provinces. Weibei, Weinan, Shonan, North Guangdong tea area suffers heavy. It is a new pest that has caused damage in southern tea regions in recent years.
Host tea.
The traits of the adult worms were gnawed on tea shoots and shoots. The larvae fed on the roots of the tea tree had a great influence on tea yield and quality.
Morphological characteristics Female adult body length 3.5-3.8mm, width 1.8-2mm, male body length 3.2-3.4mm, width 1.5-1. 7mm, body wings brown. Head and neck short, the head engraved small and thin, compound eye oval, dark brown. Antennae eleven sections, the first section of the expansion, the second section is short and thick, more than the base of each section is slightly thin, the end of the thick, dense hair on each section, l-4 brown, 5-11 11 dark brown. The prosthodontic plate is wider than long, the engraved points are arranged irregularly, the engraved points are larger and dense, the lateral edge of the posterior end l/3 is convex outward, the anterior 1/3 is obtuse, and the posterior edge has a ridge. line. The small scutellum is nearly trapezoidal, smooth and not engraved. The back of the cobweb wing has 10 to 11 lines of small engraved dots, each line being about 24 to 38, arranged neatly. Hind-wing light brown membranous. The legs, the ends of the tibial segments, and the tibial segments are dark brown and yellowish brown. The egg is 0.7mm long, long oval, blunt at both ends, early white, dark yellow before hatching. The instar larvae have a body length of 4.4-5.2mm, a C-shape, a brownish-brown head, a dark brown upper eyelid, a white, slightly yellowish body, and 3 pairs of chest feet.蛹 3.9-4.1mm long, light yellow head.
Life habits Hunan, Guangdong, a generation, winter in the soil as larvae. In the following year, the winter larvae in Hunan began to phlegm in early April. In early May, the adults emerged. In the middle of May and mid-May, they entered the period of adult invasion, began to decline in late June, spawned in late May, and began to hatch in early July. Then larvae winter. The egg period is about 14 days, the larval period is 280-300 days, the flood period is 15 days, and the adult period is 40-60 days. Natural enemies have ants, black armor, Mao column armor and so on.
Prevention methods (1) Strengthen quarantine to prevent its spread. (2) Breeding insect-resistant varieties. (3) Preying on birds, ants, or armor, or feeding on chickens and ducks. The use of Beauveria bassiana and Bacillus thuringiensis for soil treatment is advocated. (4) In the larval stage and pupa stage, first loosen the soil layer, spray 20% of extinction killing or 2.5% of the enemy killing emulsifiable concentrate 3000 times solution or 50% phoxim emulsifiable concentrate 1000 cm from the tea bush 20cm after opening the shallow ditch Diluent, then mix and cover, the application effect of the flood season is better than the larval period. (5) 10-15 days after the emergence of adult eclosion is the appropriate period of control, timely spraying of the above pesticides, once again every day Io.
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