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1 April 2012 Insecticidal Potential of Natural Zeolite and Diatomaceous Earth Formulations Against Rice Weevil (Coleoptera: Curculionidae) and Red Flour Beetle (Coleoptera: Tenebrionidae)
Goran G. Andrić, Mirjana M. Marković, Milan Adamović, Aleksandra Daković, Marijana Prazić Golić, Petar J. Kljajić
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Abstract

Insecticidal potential of natural zeolites and diatomaceous earths originating from Serbia against Sitophilus oryzae (L.) and Tribolium castaneum (Herbst) was evaluated. Two natural zeolite formulations (NZ and NZ Modified) were applied to wheat at rates of 0.50, 0.75, and 1.0 g/kg, while two diatomaceous earth (DE) formulations (DE S-1 and DE S-2) were applied at rates of 0.25, 0.50, 0.75, and 1.0 g/kg. A bioassay was conducted under laboratory conditions: temperature of 24 ± 1°C, relative humidity in the range 50–55%, in tests with natural zeolites, and 60–65%, in tests with DEs, and in all combinations for progeny production. Mortality was assessed after 7, 14, and 21 d of insect contact with treated wheat, and the total mortality after an additional 7-d recovery on untreated broken wheat. Progeny production was also assessed after 8 wk for S. oryzae and 12 wk for T. castaneum. The highest mortality for S. oryzae and T. castaneum was found after the longest exposure period and 7 d of recovery, on wheat treated with NZ at the highest rate and DEs at rates of 0.50–1.0 g/kg. Progeny reduction higher than 90% was achieved after 14 and 21 d of contact of both beetle pests with wheat treated with DE S-1 at 0.50–1.0 g/kg and DE S-2 at 0.75–1.0 g/kg, while the same level of reduction was achieved only for T. castaneum after its contact with the highest rate of NZ formulation. NZ Modified, applied even at the highest rate, revealed much lower insecticidal potential.

© 2012 Entomological Society of America
Goran G. Andrić, Mirjana M. Marković, Milan Adamović, Aleksandra Daković, Marijana Prazić Golić, and Petar J. Kljajić "Insecticidal Potential of Natural Zeolite and Diatomaceous Earth Formulations Against Rice Weevil (Coleoptera: Curculionidae) and Red Flour Beetle (Coleoptera: Tenebrionidae)," Journal of Economic Entomology 105(2), 670-678, (1 April 2012). https://doi.org/10.1603/EC11243
Received: 21 July 2011; Accepted: 4 November 2011; Published: 1 April 2012
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KEYWORDS
diatomaceous earth
insecticidal potential
natural zeolite
Sitophilus oryzae
Tribolium castaneum
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