Synthetic fumigants are extensively used for the control of stored product pests. Among these fumigants, phosphine gas (PH3) has an important role. In this study, the toxic effect of phosphine gas was investigated at low temperatures. For this purpose, adult stages of Rice weevil [Sitophilus oryzae Linnaeus, 1763 (Coleoptera: Curculionidae)], Red flour beetle [Tribolium castaneum (Herbst, 1797) (Coleoptera: Tenebrionidae)] and Confused flour beetle [Tribolium confusum Jaquelin Du Val, 1868 (Coleoptera: Tenebrionidae)] were exposed to 150, 300 and 600 ppm phosphine gas concentrations at 4, 9 and 24 hours and 1 and 2.5 °C low temperatures. It was obtained that, at 150 ppm dose, 4 hours exposure period and 1 °C temperature conditions the mortality rates for T. castaneum and T. confusum 61.06 % and 78.15 %, respectively. On the other hand, only 0.20 % mortality rate was obtained for S. oryzae under the same conditions. The studies were carried out in the stored product pests laboratory of the Plant Protection Central Research Institute in 2019. It was revealed that the mortality rate increases in all three insect species with increasing exposure time and dose under low temperature conditions.
Primary Language | Turkish |
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Subjects | Agricultural, Veterinary and Food Sciences |
Journal Section | Araştırma Makaleleri |
Authors | |
Publication Date | June 24, 2020 |
Submission Date | January 2, 2020 |
Published in Issue | Year 2020 Volume: 24 Issue: 2 |
Indexing and Abstracting