Acta Entomologica Sinica (2002) 45, 75-79

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Jun-Huan Xu, Ming-Guang Feng and Wei Yu (2002)
Effects of Pandora delphacis on the fecundity and innate capacity for increase of Myzus persicae at different temperatures and relative humidities
Acta Entomologica Sinica 45 (1), 75-79
Abstract: The effects of Pandora delphacis infection on the net reproduction rate (R0) and innate capacity for increase (rm) of the green peach aphid, Myzus persicae were investigated. Seven day old nymphs inoculated with the fungal conidia at a dosage higher than LD50 were maintained on the Chinese cabbage, Brassica oleracea, at temperatures of 10 ~ 30°C and relative humidity (RH) of 74% ~ 100%. The results indicated that number of nymphs produced by the treated aphids was significantly less than those produced in control, especially at higher temperatures (20 ~ 30°C) and RHs (95 % ~ 100%). Their rm differed greatly among the temperatures tested, showing a parabolic curve with the peak at 25°C . No significant effect of RH on their rm was detected. The inoculated aphids at 15 ~ 25°C had an innate capacity for increase significantly smaller than those in control. These results suggested that P. delphacis be a potential microbial agent against the aphid.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Chinese)
Database assignments for author(s): Jun-Huan Xu

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
general biology - morphology - evolution
environment/habitat manipulation

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Myzus persicae Cabbage (Brassica oleracea) China (south)
Pandora delphacis (entomopathogen) Myzus persicae Cabbage (Brassica oleracea) China (south)