We investigated the functional response of aphid parasitoid, Aphidius colemani Viereck (Hymenoptera: Braconidae), on the green peach aphid, Myzus persicae (Sulzer) (Hemiptera: Aphididae) at four different constant temperatures (15, 20, 25 and 30℃). Seven host densities (2, 4, 8, 16, 32, 64, and 128) were used during a 24-h period. A type III functional response for A. colemani was fit separately at each constant temperature. The estimated handling times at 15, 20, 25, and 30℃ were 0.85, 0.61, 0.41 and 0.88 day, respectively. The proportion of aphids that were parasitized showed the similar characteristics curve at four different constant temperatures.

• Jeong Joon Ahn(Research Institute of Climate Change, National Institute of Horticultural & Herbal Science, Jeju-si 63240, Korea.(ROK)) Corresponding author
• Jung-Eun Kim(Research Institute of Climate Change, National Institute of Horticultural & Herbal Science, Jeju-si 63240, Korea.(ROK))
• Chun Hwan Kim(Research Institute of Climate Change, National Institute of Horticultural & Herbal Science, Jeju-si 63240, Korea.(ROK))