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大尺蠖(Burura suppressaria benescripta Pron)又名油桐尺蠖,属鳞翅目尺蠖蛾科,是茶树主要害虫之一,在国内分布较广,1973年以来,在我场茶园大面积发生,给茶叶生产带来了严重的危害。在田间调查防治过程中,发现大尺蠖自然死虫,并从中分离得到多角体病毒,经室内外接种试验,大尺蠖幼虫的发病症状表现为:首先是食欲不振,直至停止取食,继则虫体睡胀,反应迟纯,行动缓慢,体色变淡,死亡时,大部分用臀足夹住枝条,虫体倒挂,碰破表皮,即流出灰褐色汁液,内含折光性强的多角体。1980年经中国科学院动物研究所电镜观察,本病毒属于杆状病毒科,杆状病毒属A亚组核型多角体病毒,为单粒包埋病毒。
Buruma suppressaria benescripta Pron, also known as tilapia, is a Lepidoptera moth, which is one of the major pests of tea tree. It is widely distributed in China. Since 1973, tea plantation Has brought serious harm. In the process of field investigation and prevention, the natural large dead bugs were found and the polyhedrosis virus was isolated from them. After the indoor and outdoor inoculation tests, the symptoms of larvae were as follows: the first was loss of appetite, Body sleepiness, slow reaction, slow action, body color fades, most of the death with the gluteus to hold the branches, parasites upside down, touch the epidermis, that is, out of beige juice, containing strong polyhedron . In 1980 by the Institute of Zoology Chinese Academy of Sciences observed by electron microscopy, the virus belongs to the family of Baculoviridae, baculovirus genus A subtype of nuclear polyhedrosis virus, as a single embedded virus.