一株蜀柏毒蛾无芽胞杆菌病原的鉴定与毒力研究*

doi:10.11707/j.1001-7488.20091117

Scientia Silvae Sinicae ›› 2009, Vol. 12 ›› Issue (11): 104-108.doi: 10.11707/j.1001-7488.20091117

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Identification of Pathogenic Strain of No-Sporeforming to Parocneria orienta and Its Toxicity

Feng Bo¹,Zhou Jianhua²,Guo Hengxiao³,Liu Yinggao¹,Xiao Yugui²

1.Sichuan Agriculture University Yaan 625014; 2.Sichaun Academy of Forestry Chengdu 610081; 3.Sichuan Forestry Bureau Chengdu 610066

Received:2009-03-25 Revised:1900-01-01 Online:2009-11-25 Published:2009-11-25
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Abstract

Abstract:

A pathogen was isolated from the larva of Parocneria orienta whose body was atrophic and rubescent. Its pathogenicity was testified by law of KOCH. It was identified as Brevundimonas bullata by physiological、 biochemical test and molecular systematic analysis. Toxicity of the bacterium to larva of Parocneria orientia was assayed by means of oral infection. Results showed that the linear regression relationship between the logarithm(y) of the bacteria concentration and the probability(x) of corrected mortality is Y=-9.785 1+6.667X, and the median lethal concentration is LC₅₀=9.28×10⁸ cfu·mL^-1. The result also showed that this pathogen had obvious function of restraining infection larva from taking food. The survival larva were obviously under the antitheses in length of body,avoirdupois,the ratio of eclosion,amount of nit and the ratio of hatch.

Key words: no-sporeforming bacillus, Parocneria orienta, toxicity research

CLC Number:

Feng Bo;Zhou Jianhua;Guo Hengxiao;Liu Yinggao;Xiao Yugui. Identification of Pathogenic Strain of No-Sporeforming to Parocneria orienta and Its Toxicity[J]. Scientia Silvae Sinicae, 2009, 12(11): 104-108.

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Identification of Pathogenic Strain of No-Sporeforming to Parocneria orienta and Its Toxicity

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