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Diatomaceous earth (SilicoSec®) and zeolite (ZeoFeed) were evaluated as insecticides for the management of Trogoderma granarium on wheat, rice and maize. Both inert dusts were tested at three dose rates (250, 500 and 750 ppm), at three temperatures of 15°C, 25°C and 35°C and relative humidity of 55% and 75% were used to conduct bioassays. Third instar larvae were used in bioassays. After 1, 3, 7 and 14 days of treatments, mortality of the insects was recorded. As dose rate and exposure period increased, mortality of the insects was also increased. Increase in temperature and decrease in relative humidity (R.H.) increased the mortality of insects. In case of grain commodities, mortality on wheat was more comparative to rice and maize. Maximum mortality in T. granarium was observed on wheat @ dose rate of 750 ppm at 35°C and 55% R.H. after 14 days of treatment which was 49.62% for diatomaceous earth and 45.90% in case of zeolite. Results of current study suggested that both inert dusts (diatomaceous earth and zeolite) can be used in managing this insect species but it requires further investigations because complete mortality of the insects was not recorded in any case.
Rameesha Amjad Ali, Mansoor-ul-Hasan, Muhammad Sagheer, Shahbaz Talib Sahi. (2021) ROLE OF ABIOTIC FACTORS ON THE EFFECTIVENESS OF INERT DUSTS FOR THE CONTROL OF Trogoderma granarium (COLEOPTERA: DERMESTIDAE), Pakistan Journal of Agricultural Sciences, Volume 58, Issue 2.
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