Case Study: Trap Crop with Pheromone Traps for SuppressingEuschistus servus(Heteroptera: Pentatomidae) in Cotton

摘要

The brown stink bug,Euschistus servus(Say), can disperse from source habitats, including corn,Zea maysL., and peanut,Arachis hypogaeaL., into cotton,Gossypium hirsutumL. Therefore, a 2-year on-farm experiment was conducted to determine the effectiveness of a sorghum (Sorghum bicolor(L.) Moench spp.bicolor) trap crop, with or withoutEuschistusspp. pheromone traps, to suppress dispersal of this pest to cotton. In 2004, density ofE. servuswas lower in cotton fields with sorghum trap crops (with or without pheromone traps) compared to control cotton fields. Similarly, in 2006, density ofE. servuswas lower in cotton fields with sorghum trap crops and pheromone traps compared to control cotton fields. Thus, the combination of the sorghum trap crop and pheromone traps effectively suppressed dispersal ofE. servusinto cotton. Inclusion of pheromone traps with trap crops potentially offers additional benefits, including: (1) reducing the density ofE. servusadults in a trap crop, especially females, to possibly decrease the local population over time and reduce the overwintering population, (2) reducing dispersal ofE. servusadults from the trap crop into cotton, and (3) potentially attracting more dispersingE. servusadults into a trap crop during a period of time when preferred food is not prevalent in the landscape.