اثر همزمان دما و پرتو گاما بر کاهش جمعیت شب پره هندی Plodia interpunctella (Lepidoptera: Pyralidae) روی انجیر خشک در شرایط انبار

The Indian meal moth, Plodia interpunctella is a main economic pest of stored products in Iran and the worldwide. Gamma radiation and temperature are the most important physical methods to control of stored product pests. In this research, effect of different doses of gamma radiation (50, 100, 200, 400, 600, 800 and 1000 Gy) and temperature (20, 23, 26, 28, 30, 33 and 35±1 °C) on different life stages of P. interpunctella was investigated. The results showed that eggs and adults that exposure to gamma radiation (50 Gy) died after short time. Therefore these stages are so sensitive to gamma radiation and to investigate combination of gamma radiation and temperature on these life stages of P. interpunctella are not possible. In all temperatures, survival time of larvae significantly decreased with increased radiation doses especially at 600, 800 and 1000 Gy. Also, in 33 and 35 °C, low gamma radiation deses (50, 100 and 200 Gy) caused early larvae mortality. In all most temperatures, 800 and 1000 Gy of gamma radiation results all pupae (100%) died and adult emergence was equal zero. The maximum pupa mortality percentage (or minimum adult emergence %) in low doses (50, 100 and 200 Gy) was observed at 35 °C. In this temperature, adult emergence was 30, 30 and 16.67% in doses of 50, 100 and 200 Gy, respectively. These results can be useful to integrated management of P. interpunctellaon dried figs on storages.