陕西省烟田昆虫区系调查与分类体系

根据１９９３～１９９６年的调查，本文记述陕西省烟田昆虫１９８种，属于１０目５６科。根据各种昆虫和烟叶生产的关系，提出一个烟田昆虫分类系统。根据此系统，陕西烟田有１０３种植食性昆虫，其中有６种是首先发现和记载的世界烟草新害虫，即平背螽斯、阔顶角螽、直尾须隔洋螽、银川油葫芦、中黑盲蝽、黑点丫银纹夜蛾；６种为中国烟草害虫新记录；５１种为陕西烟草害虫新记录。４４种肉食性昆虫中，１５种是世界烟草害虫新天敌；１种为中国烟草害虫天敌新记录；２２种为陕西烟草害虫天敌新记录。调查结果表明，陕西烟田中有６种主要害虫，它们是桃蚜、小地老虎、黄地老虎、棉铃虫、烟青虫和东方蝼蛄；６种局部偶发重要害虫；５种中度害虫。存在有９种主要益虫和１３种次要益虫。尚有３４种寄主未确定的害虫，还需进一步观察和研究。

An Investigation of Tobacco Insect Fauna in Shaanxi Province and Its Classification System

Based on the investigation from 1993 to 1996,198 species of insects,belonging to 56 families in 10 orders,in tobacco fields from Shaanxi Province,China,are reported in this paper.A classification system of the tobacco insects is proposed according to the relation between various insects and tobacco production.Among the 103 species of phytophagous insects,6 species are first found and recorded to be new insect pests to tobacco in the world,viz. Liotrachela convexipennis Caudell, Homorocorhphus lineosus Walker, Aelanticus pieli Tinkham, Teleogryllus infernalis (Sauaaure), Adelphocoris sutaralis Jakovlev and Aulographa nigrisigna (Walker).5 are new recorded insect pests to tobacco in China and 51 in Shaanxi Prov.Among the 44 species of carnivorous insects,15 are firstly recorded as new natural enemies to tobacco insect pests in the world,1 in China and 22 in Shaanxi Province.The investigation results also indicate that in the tobacco fields of Shaanxi there are 6 species of major pests,namely, Myzus persicae (Sulzer), Agrotis ypsilon Rottemburg,A.segetum (Shiffermuller), Helicoverpa armigera (Hubner), H.assulta (Guenee) and Gryllotalpa orientalis Brumeister;6 species of locally sporadic pests and 5 species of common pests;but 9 species of major carnivores and 13 species of common carnivores.There are still 34 species of host undetermined pests needing further observation and study.