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journal1 ›› 2018, Vol. 34 ›› Issue (6): 825-830.DOI: 10.16409/j.cnki.2095-039x.2018.06.004

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

TANG Yiting, GUO Yi, HE Guowei, LIU Chenxi, CHEN Hongyin, ZHANG Lisheng, WANG Mengqing   

  1. USDA-ARS Sino-American Biological Control Laboratory/Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
  • Received:2018-03-30 Online:2018-12-08 Published:2018-12-08

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 3rd, 4th, 5th and adult individuals were confined with varying densities of the 3rd instar caterpillar for 24 hours in petri-dishes. The average daily number of prey consumed was 3.33 (3rd), 4.23 (4th), 8.00 (5th), 6.50(adult). All the predator stages exhibited Holling Ⅱ functional responses, with attacking efficiency of 1.036 (3rd), 0.742 (4th), 1.445 (5th), and 1.422 (adult) and handling time of 0.313 d (3rd), 0.158 d (4th), 0.112 d (5th), and 0.135 d (adult). P. lewisi preferred living prey over dead one. The results show that the 5th instars of P. lewisi are potential for field release.

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

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