The plant bug, Nesidiocoris tenuis (Reuter, 1895), is used as a biological control agent on various crops such as tomato and paprika. In this study, the egg and all the nymphal stages of N. tenuis are described and illustrated for the first time based on morphological characters. The main morphological characters of each instar are as follows: body shape, body size, development of wing pads, density of pubescent covered with abdomen, and colorations of antenna and legs, etc. Additionally, biological information such as feeding habits and mating are also provided with life cycle photographs.

• Hodan Lee(Department of Applied Biology, Chungnam National University)
• Junggon Kim(Department of Applied Biology, Chungnam National University)
• Sunghoon Jung(Department of Applied Biology, Chungnam National University) Corresponding author