Functional Responses of Picromerus lewisi Scott (Hemiptera: Pentatomidae) Attacking Mythimna separata (Walker) (Lepidoptera: Noctuidae)

doi:10.16409/j.cnki.2095-039x.2018.06.004

Abstract

Abstract: Picromerus lewisi Scott is an important predatory insect. The predation ability of P. lewisi at different stages on Mythimna separata (Walker) was studied to evaluate its potential in biological control. The predator 3^rd, 4^th, 5^th and adult individuals were confined with varying densities of the 3^rd instar caterpillar for 24 hours in petri-dishes. The average daily number of prey consumed was 3.33 (3^rd), 4.23 (4^th), 8.00 (5^th), 6.50(adult). All the predator stages exhibited Holling Ⅱ functional responses, with attacking efficiency of 1.036 (3^rd), 0.742 (4^th), 1.445 (5^th), and 1.422 (adult) and handling time of 0.313 d (3^rd), 0.158 d (4^th), 0.112 d (5^th), and 0.135 d (adult). P. lewisi preferred living prey over dead one. The results show that the 5^th instars of P. lewisi are potential for field release.

Key words: Picromerus lewisi, Mythimna separate, instar, functional responses, biological control

CLC Number:

S476.2

TANG Yiting, GUO Yi, HE Guowei, LIU Chenxi, CHEN Hongyin, ZHANG Lisheng, WANG Mengqing. Functional Responses of Picromerus lewisi Scott (Hemiptera: Pentatomidae) Attacking Mythimna separata (Walker) (Lepidoptera: Noctuidae)[J]. journal1, 2018, 34(6): 825-830.

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