两种玉米螟微粒子虫对玉米螟致病性的比较

两种玉米螟微粒子虫对玉米螟致病性的比较

王万成¹; 问锦曾²

1.吉林省通化市农业科学研究所,海龙镇 135007;2.中国农业科学院植物保护研究所,北京 100094

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1992-08-08 发布日期:1992-08-08

COMPARATIVE PATHOGENICITY OF NOSEMA FURNACALIS AND NOSEMA PYRAUSTA IN ASIAN CORN BORER, OSTRINIA FURNACALIS [LEP.:PYRALIDAE]

WANG Wan-cheng¹;WEN Jin-zeng²

1.Tonghua Institute of Agricultural Sciences,Tonghua,Jilin 135007;2.Institute of Plant Protection,Chinese Academy of Agricultural Sciences,Beijing 100094

Received:1900-01-01 Revised:1900-01-01 Online:1992-08-08 Published:1992-08-08

摘要/Abstract

摘要： 室内试验,用微粒子虫Nosema furnacalis(Nf)和N.pyrausta(Np)系列浓度孢子接种亚洲玉米螟3龄幼虫,每头虫吞食15个孢子,绝大部分虫均可感染。Nf和Np对亚洲玉米螟的LD50分别为1255和29015孢子/头。LT50随Nf的接种剂量由1.5×10⁵增至1.5×10⁶孢子/头,而由7.4天减至5.2天。但在同样剂量下,Np对亚洲玉米螟的LT50要比Nf的长2.2至3.5倍。由此认为Np较Nf更适于作为玉米螟虫口的长效控制因子,特别是在Nf难以在亚洲玉米螟种群中持续的2～3代区。

Abstract: In the laboratory tests, third instar larvae of Asian corn borer (ACB), Ostrinia furnacalis, were treated with spores of Nosema furnacalis and N. pyrausta at a series of concentrations. The results showed that the larvae were highly susceptible to Nf and Np, even at a dosage of 15 spores per larva. The LD50 of Nf and Np were 4,255 spores/larva and 29,015 spores/larva, respectively. The LT 50 of Nf decreased from 7.4 to 5.2 days with increase in the dosage from 1.5×105 spores/larva to 1.5×106 spores/larva, while the LT 50 of Np was 2.2 to 3.5 times longer than\' that of Nf at the same dosage. It is suggested that N. pyrausta, the less virulent species, be more suitable to be used as a long-term population control agent, especially in bivoltine or trjvoltinc ACB occurring areas, where N. furnacalis, the more virulent species, is difficult to- persist in ACB populations.

王万成1 ; 问锦曾2 . 两种玉米螟微粒子虫对玉米螟致病性的比较[J]. , DOI: .

WANG Wan-cheng¹;WEN Jin-zeng². COMPARATIVE PATHOGENICITY OF NOSEMA FURNACALIS AND NOSEMA PYRAUSTA IN ASIAN CORN BORER, OSTRINIA FURNACALIS [LEP.:PYRALIDAE][J]. , DOI: .