Effects of low ozone concentrations and short exposure times on the mortality of immature stages of the Indian meal moth, Plodia interpunctella (Lepidoptera: Pyralidae)
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Department of Plant Protection, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, 9177948974 Iran
Department of Food Science and Technology, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, 9177948974 Iran
Ensieh Keivanloo
Department of Plant Protection, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, 9177948974 Iran
Submission date: 2014-01-22
Acceptance date: 2014-07-24
Journal of Plant Protection Research 2014;54(3):267–271
In Iran, the Indian meal moth, Plodia interpunctella (Hübner), is one of the most important pests of such stored products as date fruits and pistachio nuts. Ozone was applied as a gas at four concentrations (0, 2, 3, and 5 ppm) for four different periods (30, 60, 90, and 120 min) on the immature stages of P. interpunctella. The results indicated that by increasing the concentration and exposure time, the rate of mortality increased for all tested stages. This study showed that 12-day-old larvae were more susceptible than other stages when exposed to 5 ppm ozone for 120 min. The next in order of susceptibility were pupae, then 5-day-old larvae, and 17-day-old larvae had the highest sensitivity to ozonation. At the highest concentration of ozone, for the longest time, the least mortality rate was recorded for one-day-old eggs. According to the results, a reduction in the population density of P. interpunctella in laboratory experiments is promising. However, validation studies will be necessary to fully determine the potential of ozone as a replacement for the current post harvest chemical control of P. interpunctella on either pistachio nuts or date fruits.
The authors have declared that no conflict of interests exist.
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