Insecticidal effect of juniperus Polycarpus for control of three stored product pests Tribolium castaneum، Callosobruchus maculatus، Ephestia kuehniella
Subject Areas : entomology and othea arthropods
R.
Payandeh
1
(Dept. Of Plant Protection, College of Agriculture, Vali-e-Asr University of Rafsanjan)
H.
Izadi
2
(Dept. of Department of Horticulture, College of Agriculture, Vali-e-Asr University of Rafsanjan)
M. R.
Pirmoradi
3
(Dept. of Department of Horticulture, College of Agriculture, Vali-e-Asr University of Rafsanjan)
Keywords:
Abstract :
The cereals are one of the most important problems in the stored products that have been stored after harvest until consumption. The red flour beetle (Tribolium castaneum), The Mediterranean flour moth (Ephestia kuehniella) and the bean beetle (Callosobruchus maculat) are the most important cosmopolitan stored pests. In this study, the effects of five juniper extract concentrations were performed on percent mortality of storage pests with three replications and under 25±2 C° and 65±5% RH condition. Contact toxicity was investigated by spraying the extracts on a Ptridish surface using Potter’s spray tower. Fifteen insects were released to each Ptridishe and mortality was counted after 24, 48 and 72 hours. The results of bioassays showed that with an increase in plant extract concentration, mortality increased significantly. The LC50 values after 24, 48 and 72 hours for the adults of the red flour beetle were calculated as 22662, 67056 and 73103 respectively. The LC50 values after 24, 48 and 72 hours for the bean beetle were estimated as 55231, 67629 and 71991 µl/L, respectively. The LC50 values after 24, 48 and 72 hours for the Mediterranean flour moth last instar larvae were obtained as 71842, 101289 and 145583 µl/L, respectively.
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