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VOL. 9, ISSUE 1 (2024)
Efficacy of diatomaceous earth and temperature to control the bean weevil, Acanthoscelides obtectus Say, 1831 (Coleoptera: Bruchidae) in stored bean
Authors
Mehmet Karakas
Abstract
This study was carried out to investigate the
suitability of the diatomaceous earth (DE) material in biological control of
the bean weevil, Acanthoscelides obtectus depending on the temperature.
Treatment with DE is an efficient insect control technique in Integrated Pest
Management (IPM) programs of stored grain pests. Its main advantages are low
toxicity to environment, non-target organisms and long lasting efficacy. The
objective of this application was to evaluate the efficacy doses and
temperatures to control the bean weevil, A. obtectus in stored bean. In
plastic cups with 150 g of clean and dry bean grains, 50 non-sexed 7-14 day-old
adults of A. obtectus were submitted to the following applications in
three replicates; DE (DE-CRAWL) at 350, 700 and 1000 mg kg-1, at 20,
25 and 30 ºC. The mortality was evaluated from the 2nd to 30th
day. After this period, the adults were removed and the progeny was kept until
the 60th day when the insects were counted and the grain moisture
content evaluated. The effect of temperature on A. obtectus mortality
was significant for the three DE doses. The 700 and 1000 mg kg-1
doses caused the highest mortality at 25 ºC and 30 ºC but with no significant
difference between them. The progeny development was significantly higher in
the control group compared to the treatments with DE. There was no significant
difference in the number of progeny among the three DE doses at any of the
temperatures studied. The results support the use of DE as an effective grain
protectant against the bean weevil, A. obtectus in stored bean.
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Pages:38-42
How to cite this article:
Mehmet Karakas "Efficacy of diatomaceous earth and temperature to control the bean weevil, <i>Acanthoscelides obtectus </i>Say, 1831 (Coleoptera: Bruchidae) in stored bean". International Journal of Zoology Studies, Vol 9, Issue 1, 2024, Pages 38-42
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