Effect of temperature on the functional response of Adalia bipunctata to Myzus persicae |
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Authors: | Mohammad Amin Jalali Luc Tirry Patrick De Clercq |
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Institution: | 1. Department of Crop Protection, Ghent University, Coupure Links 653, 9000, Ghent, Belgium
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Abstract: | The effect of temperature on the functional response of female adults of the two-spot ladybird, Adalia bipunctata L. (Coleoptera: Coccinellidae) was examined in petri dish arenas containing sweet pepper leaves infested with different densities of the green peach aphid, Myzus persicae (Sulzer) (Hemiptera: Aphididae). The predator showed a type II functional response at three tested temperatures ranging from 19°C to 27°C. The theoretical maximum number of prey captured by the predator increased with temperature. Based on the random predator equation, the estimated attack rates ranged from 0.13 h?1 at 19°C to 0.35 h?1 at 27°C on a leaf area of 20–25 cm2. There was no significant difference between the attack rates of the predator at 23°C and 27°C. Handling time significantly decreased as temperature increased from 19°C (0.39 h) to 27°C (0.24 h). This study shows that A. bipunctata displays high predation rates on M. persicae for a wide range of temperatures, indicating its potential for augmentative releases against this aphid pest. The limitations of the predictions generated by functional response experiments are discussed. |
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