Effect of plant secondary metabolites on common cutworm,Spodoptera litura(Lepidoptera: Noctuidae)
2018
Qi SU, Yangtze University, Jingzhou, Hubei, China | Zhixiong ZHOU, Yangtze University, Jingzhou, Hubei, China | Jianmin ZHANG, Yangtze University, Jingzhou, Hubei, China | Caihua SHI, Yangtze University, Jingzhou, Hubei, China | Guohui ZHANG, Yangtze University, Jingzhou, Hubei, China | Zhenyu JIN, Yangtze University, Jingzhou, Hubei, China | Wenkai WANG, Yangtze University, Jingzhou, Hubei, China | Chuanren LI, Yangtze University, Jingzhou, Hubei, China
The effect of various flavonoids, lectins and phenylβ-D-glucoside on larval survival,weights and the activities of digestive (total serine protease and trypsin) anddetoxifying (esterase and glutathione-S-transferase) enzymes ofSpodoptera lituralarvae at 7 days after treatment was studied through diet incorporation assay.Flavonoids (rutin, chlorogenic acid, quinic acid, caffeic acid, naringenin, quercitin,kaempferol, myricetin, catechin, and ferulic acid) were incorporated in artificial dietat 100, 500 and 1000 ppm, lectins: groundnut leaf lectin (GLL), concavalin A(ConA) and phenylβ-D-glucoside at 1, 2 and 5μg/mL. Flavonoids such as rutin,quercitin and kaempferol at 1000 ppm were more toxic toS. lituralarvae than quinicacid, caffeic acid, naringenin, myricetin, catechin, and ferulic acid. Larval growth anddevelopment were significantly reduced inS. lituralarvae fed on a diet with GLL andConA at 5μg/mL compared to the larvae fed at 2 and 1μg/mL concentrations. Thelarvae fed on flavonoid-treated diets showed significant reduction in serine protease,trypsin and esterase activities. The flavonoids such as rutin, chlorogenic acid, quinicacid, naringenin, quercitin, kaempferol and myricetin, and lectins, GLL and ConAcan be utilized in insect control programs.
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