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1 August 2006 Hydroprene Prolongs Developmental Time and Increases Mortality in Wandering-phase Indianmeal Moth (Lepidoptera: Pyralidae) Larvae
S. Mohandass, F. H. Arthur, K. Y. Zhu, J. E. Throne
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Abstract

Wandering phase Indianmeal moth, Plodia interpunctella (Hübner), larvae were exposed to the label rate of hydroprene (1.9 × 10−3 mg [AI]/cm2) sprayed on concreted petri dishes. Larvae were exposed for 1, 3, 6, 12, 18, 24, and 30 h and maintained at 16, 20, 24, 28, and 32°C and 57% RH until adult emergence. Larval developmental time and mortality were significantly influenced by temperature and exposure intervals. Maximum developmental time (47.2 ± 1.3 d) occurred at 16°C, and the minimum developmental time (7.0 ± 0.5 d) occurred at 32°C. Larval mortality generally increased at all of the five tested temperatures as exposure period increased. The greatest mortality (82.0 ± 0.1%) occurred when larvae were exposed for 30 h at 28°C, and minimum mortality (0.0 ± 0.5%) occurred at 16°C when larvae were exposed for 1 h. The relationships between temperature, exposure period, and developmental time were described by polynomial models, based on lack-of-fit tests. Hydroprene has potential to be an effective alternative to conventional insecticides in surface treatments for Indianmeal moth management. Response-surface models derived from this study can be used in simulation models to estimate the potential consequences of hydroprene on Indianmeal moth population dynamics.

S. Mohandass, F. H. Arthur, K. Y. Zhu, and J. E. Throne "Hydroprene Prolongs Developmental Time and Increases Mortality in Wandering-phase Indianmeal Moth (Lepidoptera: Pyralidae) Larvae," Journal of Economic Entomology 99(4), 1509-1519, (1 August 2006). https://doi.org/10.1603/0022-0493-99.4.1509
Received: 12 August 2005; Accepted: 1 December 2005; Published: 1 August 2006
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