65 Mollah and Rahman Int. J. Biosci. 2012 RERESEARCH PAPER OPEN ACCESS Abundance of predators in country bean field during summer season M. M. I. Mollah 1* , M. M. Rahman 2 1 Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur, Bangladesh 2 Department of Entomology, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur, Bangladesh Received: 08 August 2012 Revised: 12 September 2012 Accepted: 14 September 2012 Key words: Predaceous insects, spider, abundance. Abstract The study was conducted at the experimental field of Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur, Bangladesh during March to June 2009 in order to know the abundance of biological control agents (predators) in country bean ecosystem. During the study period the predators, black ant (Formicidae), lady bird beetle (Coccinellidae), Stink bug (Pentatomidae), Damsel fly (Coenagrionidae) and spider was found considerably. At the vegetative stage black ant (Formicidae) was highly abundant followed by lady bird beetle and spider. At the reproductive stage lady bird beetle, black ant and pentatomid bug found abundantly. * Corresponding Author: M. M. I. Mollah  mahiimam@yahoo.com International Journal of Biosciences (IJB) ISSN: 2220-6655 (Print) 2222-5234 (Online) Vol. 2, No. 9, p. 65-70, 2012 http://www.innspub.net