亚蝗微粒子虫新种记述（微孢子门：微粒子科）

NOTE ON NOSEMA ASIATICUS SP.NOV.(MICROSPORA: NOSEMATIDAE )

本文记述寄生于亚洲小车蝗的一种微粒子虫一新种，亚蝗微粒子虫Ｎｏｓｅｍａａｓｉａｔｉｃｕｓｓｐ．ｎｏｖ．；描述了其光镜和电镜形态特征及寄生习性。

Nosema asiaticus sp.nov.(PI.I)Host and Site (Natural) Oedaleus asiaticus B.-B. Infections were mainly in midgut,gastric caeca,Malpighian tubules and gonods;(Experimental) O. infernalis infernalis S.,O.decorus (G.),Locusta migratoria manilensis (M.),Acrida chinensis (W.),Euprepocnemisshirakii I. Bol.,Calliptamus abbreviatus I.,C.italicus italicus (L.),Oxya chinensis (T.),Chorthippus fallax (Z.),C.dubius (Z.),Bryodema gebleri mongolicum (Z.), Dociostauruskraussi krausi (I.),Gomphocerus sibricus (L.),G. licenti (C.) Angaracris rhodopa (F. -W.)A. barabensis (P.),Helicoverpa armigera (H.) and Ostrinia furnacalis (G.). Infections inmany tissues of larva.Life Cycle Monomorphic.Meronts with 2, 4, 8,or 12 nuclei in diplokary on arrangement. Sporont rhombic with 2 diplokarya giving rise to two sporoblasts.Spore Fresh spores ellipsoidal,4.18 ± 0. 28 × 1. 81 ± 0. 07μm, length/breadth ratio2.30 ± 0.15 (n = 50). Polar filament normally arranged in 11 coils at angles of 60°to the longitudinal axes of spores.Discussion The Nosema sp. studied could cause infection in lepidopterous insects similar to that caused by N. acridophagus and N. cuneatum (Henry,1979),and they all havesimilar coils of filament. However the breadth of spores or both length and breadth of sporesdiffer distinctly from each other, which indicates that they are different species. In addition,the species is easily distinguished from other Nosema from Acrididae by having differentspore ultrastructure or tissue specificity (Table 1).Therefore,the specimens found in O. asiaticus is a new species and proposed a name Nosema asiaticus sp. nov.Type locality Wuchuan County (41°l' N, 111°5' E ),Inner Mongolia Autonomous Region.Sept.1987,collected by SUN Chuan-xin.Type slides are deposited in the institute of Plant Protection,Chinese Academy ofAgricultural Sciences,Beijing.