Phytoparasitica (2007) 35, 119-122

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Jennifer H. Cameron, Murray B. Isman and Mahesh K. Upadhyaya (2007)
Variability in response to toosendanin in a laboratory colony of Trichoplusia ni
Phytoparasitica 35 (2), 119-122
Abstract: Laboratory rearing of insects for scientific research ensures a constant supply of insects. However, laboratory colonies may diverge genetically and/or phenotypically from wild populations due to selection pressures in their artificial environment. This study examined how variation in a colony of Trichoplusia ni influenced reproducibility over time of bioassays of toosendanin (a limonoid extracted from the bark of Melia azedarach). In four of five experiments insect growth was reduced significantly (P=0.05) by the presence of toosendanin in the diet. The fifth experiment showed the same trend, but the effect was not significant. Mean larval mass of both control and treated insects also varied greatly among experiments. The considerable variability observed in this population highlights the importance of replicating experiments in time, and not just space, to confirm reproducibility of treatment effects.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Murray B. Isman, Mahesh K. Upadhyaya

Research topic(s) for pests/diseases/weeds:
rearing/culturing/mass production
control - general


Pest and/or beneficial records:

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


Trichoplusia ni