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Author:Po-Hung Chen, Tai-Chuan Wang, Chiung-Hui Huang, Yi-Fen Chu, and Shou-Horng Huang*
Abstract:
The present study was conducted to evaluate the effectiveness of five recommended insecticides for controlling the adult of sweetpotato weevil in Taiwan. Three test methods, tower spray, leaf-dipping and tuber-dipping, were adopted to examine their initial and residual effects on the tested insect in a laboratory conditions. The results revealed that chlorpyrifos (25% WP), profenofos (43% EC) and cartap hydrochloride (50% SP) showed significantly higher effects than the others in all tested methods at the time of treatments, and the mortality of the 3 insecticides was 100% by using leaf-dipping method on the 3rd day. The mortality of the insect increased with the concentration of the insecticides with except of acetamiprid (20% SP) and dinotefuran (20% SG). The residual effects of insecticides to adults showed that the mortality of most insecticidal treatments obtained about only half or less than the initial effects. However, the treatment of chlorpyrifos (25% WP) obtained 100% and 46% mortality at 3 days and 7 days after treatment, respectively.
Key words:Sweetpotato weevil, Insecticide, Control
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Taiwan Agricultural Research
ISSN: 2790-086X
Vol. 73, No.1 (2024)
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