title: Colored Sticky Traps to Selectively Survey Thrips in Cowpea Ecosystem.
abstract: The bean flower thrips, Megalurothrips usitatus (Bagrall) (Thysanoptera: Thripidae), is an important pest of legume crops in South China. Yellow, blue, or white sticky traps are currently recommended for monitoring and controlling thrips, but it is not known whether one is more efficient than the other or if selectivity could be optimized by trap color. We investigated the response of thrips and beneficial insects to different-colored sticky traps on cowpea, Vigna unguiculata. More thrips were caught on blue, light blue, white, and purple traps than on yellow, green, pink, gray, red, or black traps. There was a weak correlation on the number of thrips caught on yellow traps and survey from flowers (r = 0.139), whereas a strong correlation was found for blue traps and thrips' survey on flowers (r = 0.929). On commercially available sticky traps (Jiaduo®), two and five times more thrips were caught on blue traps than on white and yellow traps, respectively. Otherwise, capture of beneficial insects was 1.7 times higher on yellow than on blue traps. The major natural enemies were the predatory ladybird beetles (63%) and pirate bugs Orius spp. (29%), followed by a number of less representative predators and parasitoids (8%). We conclude the blue sticky trap was the best to monitor thrips on cowpea in South China.
authors.affiliation: Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, Peoples Republic of China. tangldcatas@163.com.
authors.forename: L D
authors.initials: LD
authors.lastname: Tang
authors.affiliation: Institute of Plant Protection, Hainan Key Lab for Control of Plant Diseases and InsectPests, Hainan Academy of Agricultural Sciences, Haikou, Peoples Republic of China.
authors.forename: H Y
authors.initials: HY
authors.lastname: Zhao
authors.affiliation: Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, Peoples Republic of China.
authors.forename: B L
authors.initials: BL
authors.lastname: Fu
authors.affiliation: Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, Peoples Republic of China.|Dept of Entomology, College of Agriculture, South China Agricultural University, Guangzhou, 510642, Peoples Republic of China.
authors.forename: Y
authors.initials: Y
authors.lastname: Han
authors.affiliation: Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, Peoples Republic of China.
authors.forename: K
authors.initials: K
authors.lastname: Liu
authors.affiliation: Dept of Entomology, College of Agriculture, South China Agricultural University, Guangzhou, 510642, Peoples Republic of China. jhw@scau.edu.cn.
authors.forename: J H
authors.initials: JH
authors.lastname: Wu
mesh_terms: D000818:Animals; D002681:China; D007300:Insect Control / Q000295:instrumentation*; D061149:Thysanoptera; D000070658:Vigna
keywords: Beneficial insects; color sticky trap; cowpea; insect monitoring