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VOL. 8, ISSUE 10 (2023)
Efficacy of high temperatures on the different stages of Callosobruchus maculatus (F.) (Coleoptera: Chrysomelidae)
Authors
Essam M Sayed, Manar Y Amin
Abstract
The cowpea beetle, C. maculatus infests the pulses both in the
field and during storage. Thermal disinfestation was investigated as safe
physical control method for larvae, pupae and adults of C. maculatus by
exposing the infested cowpea seeds to three different temperature regimes (40,
50 and 60 ̊°C) for various exposure periods. A complete mortality (%) of adults
C. maculatus was achieved after 20 min at 60°C while 40 °C was 83%
mortalities at 50 and 40 °C after 55 and 1800 min of exposure times,
respectively. The progeny number decreased with increasing both of the exposure
time and the temperature degree. The sub-lethal time (LT50) required
for 50% kill of the adults population was 1566, 60.0, 16.1min at 40, 50 and 60
̊°C. Larvae were the most susceptible stage to heat compared to the pupal and
adult stage at different temperature degrees. Pupal and adult stages were the
most heat tolerant stages. No bad effects were observed on cowpea seeds
germination (%) at tested higher temperatures.
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Pages:11-16
How to cite this article:
Essam M Sayed, Manar Y Amin "Efficacy of high temperatures on the different stages of <i>Callosobruchus maculatus</i> (F.) (Coleoptera: Chrysomelidae)". International Journal of Entomology Research, Vol 8, Issue 10, 2023, Pages 11-16
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