INFLUENCE OF CULTURAL CONDITIONS ON THE VIRULENCE OF CONIDIA AND BLASTOSPORES OF BEAUVERIA-BASSIANA TO THE GREEN LEAFHOPPER, NEPHOTETTIX-VIRESCENS

被引：49

作者：

LANE, BS ^{[1
]}

TRINCI, APJ ^{[1
]}

GILLESPIE, AT ^{[1
]}

机构：

[1] AFRC, INST HORT RES, LITTLEHAMPTON BN17 6LP, W SUSSEX, ENGLAND

来源：

MYCOLOGICAL RESEARCH | 1991年 / 95卷

关键词：

D O I：

10.1016/S0953-7562(09)80046-4

中图分类号：

Q93 [微生物学];

学科分类号：

071005 ; 100705 ;

摘要：

Determinations were made of the median lethal concentration (LC50) and median lethal time (LT50) of conidia and blastospores of B. bassiana against adult Nephotettix virescens (green leafhoppers). There was no significant difference between the LC50 values for blastospores produced in carbon- and nitrogen-limited cultures, but both types of blastospores were significantly less virulent than conidia. The LT50 values of conidia and of blastospores from nitrogen-limited cultures were significantly lower than the value for blastospores produced in carbon-limited culture. The LT50 values of conidia and blastospores increased during storage at 25-degrees-C and were inversely related to spore viability. At all but one concentration tested, nitrogen-limited blastospores 'adhered' to insects more strongly than did carbon-limited blastospores. Fewer spores germinated on insect wings than on agar medium and of the three spore types studied, maximal germination on insect wings was observed with nitrogen-limited blastospores.

引用

页码：829 / 833

页数：5

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