【摘要】 <正> 1982年我们从广西、贵州等地稻纵卷叶螟体内曾检出微孢子虫孢子,近年对这种微孢子虫进行了研究,发现是一种新的微粒子虫。我国玉米螟微粒子虫曾被认为是Nosemapyraustae(Paillot,1928)Wieser(问锦曾,1965),但近年作者等观察我国几个省区孢子样本的超微构造,并和美国N. pyrausta(Paillot)直接作了形态学与病理学比较,发现它也是微粒子虫属一新种。本文将这两新种作一记述。新种模式玻片标本保存在北京,中国农业科学院植物保护研究所。更多还原

【Abstract】 The present paper gives the descriptions of two new species of Nosema. Slides with type specimens were deposited in the Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing.Nosema medinalis sp. nov. (figs. 1-17)Host and Site: (Natural) Cnaphalocrocis medinalis Guenée, infection in all stages, many tissues except fat body; Macrocentrus sp; (Experimental) Helinthis armigera (H.) (infection in silk glands, Malpighian tubles and midgut), Ostrinia furnacalis (G.) (infection in slik glands only), but Agrotis ipsilon (H.), Chilo suppressalis (W.), Pieris rapae L., Spodop;era litura F. Bombyx mari L., and Mythimna separata (W.) were reflected to the infection.Lesion: Infected silk glands and Malpighian tubules hypertrophied and white.Life cycle: Schizonts typically with 2-8 nuclei (in diplokarvon), occasionally 10-12 nuclei. Sporont with nuclei in diplokaryon arrangement gives rise to two spores. Chains of sporont containing 2-8 daughter forms were seen (figs. 1-15).Spore: Fresh spores elongated and slightly curved, mean size 3.7×1.7 μm, polar filament arranged in 8-10 coils at an angle of 56° to the axis of spore, mean length 67.4,+16.1 μm (figs. 16, 17).Type locality: Hefei, Anhui Province. Nosema furnacalis sp nov. (figs. 18-26)Nosema pyroustae (Paillot, 1928); Wenn 1965, Acta Zool. Sinica 17 (1): 64-68 figs. 1-32Host and Site: (Natural) Osirinia furnacalis (G.), infection in all stages, many tissues except fat body; Lvdella grisescens R.-D., Macrocentrus linearis (Nees); (Experimental) Nomo-phila noctuella S., Proceras venosatus (W.), Lymamria disparL, Spodoptera. litura F.,Philo-samia cyntha-ricina D., Antheraea pernyi G.-M. Heliothis armigera (H.), Cnaphalocrocis medinalis G., Bombyx mori L. and Pieris rapae L., but Mythimna separata (W.), Agrotis ipsilon (H.), Clostera anachoreta (F.) and Stilnotia Candida S. were reflected to the infection.Lesion: Infected silk glands and salivary glands appear snow-white and grossly hypertro- phied (figs. 23, 24).Life cycle: Schizonts with 2-8 nuclei common, 12-16 nuclei rare. Sporont divided into 2 sporoblasts which transform into spores; some of them develop into giant spores. During most of the life cycle, the nuclei were in diplokaryon; arrangement and only monomorphic was seen.Spore:0voidal or ellipsoidal. 3.9+0.5 ×2.2 +0.3μm, polar filament arranged in 9-10 coils at an angle of 56° to the axis of spore, mean length 47.3 +7.9 μm., posterior vacuole is clearly large (figs. 18, 19, 20, 21).Type locality: Hailon, Jilin Province.Discussion: This species closely resembles N. pyrausta by having the similar hosts and the specialization to tissues, and overlaped spore sizes, but may be differentiated from the latter by having lower length/breadth ratio and distinct ultrastructure of spores and the characteristic appearence of infected silk glands and salivary glands in Ostrinia furnacalis. (figs. 25, 26).更多还原