NDLI: Influence of Lecanicillium attenuatum on the development and reproduction of the cotton aphid, Aphis gossypii

Content Provider	Springer Nature Link
Author	Kim, Jeong Jun
Copyright Year	2007
Abstract	The activity of entomopathogens on insect pests has been investigated for many species but the influence of entomopathogenic fungi on factors other than mortality relating to population increase has not been frequently studied. The influence of Lecanicillium attenuatum CS625 (=Verticillium lecanii CS625) on development and reproduction of cotton aphid (Aphis gossypii) was investigated. A conidia suspension of the isolate was applied onto first instar nymphs. Increased spore concentration did not significantly affect each nymphal stage, total nymphal period, pre-reproductive period and the age of first larviposition. A significant dose effect on reduction of life span, reproductive period and fecundity was observed in 1st and 3rd instars after spore application. When conidia were applied to 1st instars, life span was significantly reduced to 10.8 and 8.4 days at 1 × 104 and 1 × 108 conidia/ml, respectively from 12.2 days in the control. During the life span, total fecundity was 41 ± 7.3, 26 ± 0.8 and 22 ± 5.7 nymphs per female at 1 × 104, 1 × 106 and 1 × 108 conidia/ml, respectively compared with 51 ± 2.0 nymphs per untreated female. Reproduction period was also significantly shortened with increasing spore concentration. Application of spores to 3rd instars showed a similar trend. However, daily fecundity of individual aphids was not affected by spore dose. It was concluded that the isolate of L. attenuatum is able to affect populations of cotton aphid by reducing life span and total fecundity as well as by killing the aphids directly.
Starting Page	789
Ending Page	799
Page Count	11
File Format	PDF
ISSN	13866141
Journal	BioControl
Volume Number	52
Issue Number	6
e-ISSN	15738248
Language	English
Publisher	Springer Netherlands
Publisher Date	2007-01-23
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Aphis gossypii cotton aphid development entomopathogenic fungi fecundity Lecanicillium attenuatum Verticillium lecanii Plant Sciences Animal Systematics/Taxonomy/Biogeography Plant Pathology Evolutionary Biology
Content Type	Text
Resource Type	Article
Subject	Insect Science Agronomy and Crop Science

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