Hajek A E, Walsh S R, Strong D R, Silver J C
Department of Entomology, Cornell University, Ithaca, New York 14853-0901, USA.
J Invertebr Pathol. 1996 Nov;68(3):260-8. doi: 10.1006/jipa.1996.0094.
Fungal epizootics occurred in abundant Orgyia vetusta (western tussock moth; Lepidoptera: Lymantriidae) populations on Lupinus arboreus bushes growing on the Pacific coast north of San Francisco, California. The causative pathogen was isolated and identified as Entomophaga aulicae, Group II, based on RFLPs using rDNA and PCR-amplified rDNA products. Inability of this fungus to infect the lymantriid Lymantria dispar (gypsy moth) confirmed its distinction from Entomophaga maimaiga, the only other member of this species complex which predominantly infects lymantriids. Later instar wandering by O. vetusta in outbreak populations and close proximity of larvae in dense populations are characteristics most probably promoting development of E. aulicae epizootics; these life history patterns are also typical of Lymantria dispar populations experiencing epizootics of E. maimaiga.
在加利福尼亚州旧金山以北太平洋沿岸生长的羽扇豆灌木丛中，大量的西方毒蛾（Orgyia vetusta；鳞翅目：毒蛾科）种群发生了真菌流行病。通过使用rDNA和PCR扩增的rDNA产物进行RFLP分析，分离出致病病原体并鉴定为II组的奥氏虫霉（Entomophaga aulicae）。这种真菌无法感染毒蛾科的舞毒蛾（Lymantria dispar），这证实了它与该物种复合体中唯一主要感染毒蛾科的另一个成员——舞毒蛾虫霉（Entomophaga maimaiga）的区别。在爆发种群中，西方毒蛾老龄幼虫四处游走，且在密集种群中幼虫彼此靠近，这些特征很可能促进了奥氏虫霉流行病的发展；这些生活史模式也是经历舞毒蛾虫霉流行病的舞毒蛾种群的典型特征。
