Changes of Sensitivities and detoxification enzymes of Plutella xylostella L.Feeding on Different Host Plants to chlorantraniliprole

Author of the article:Yin Fei

Author's Workplace：Institute of Plant Protection, Guangdong Academy of Agricultural Sciences,

Key Words：Plutella xylostella L., Host plants, Chlorantraniliprole, Detoxification enzyme activity, Susceptibility

Abstract：Abstract: In order to ascertain the internal factors that host plants infect Plutella xylostella (DBM:Diamondback moth) resistance, the susceptibility to chlorantraniliprole and enzymic activity of DBM larva were tested with bioassay and biochemical methods. The DBM larva were fed with 4 preferred species host plants which were Brassica parachinensis, B. juncea, B. chinensis and B. alboglabra. The results showed that the most susceptible DBM larva was those fed with B. alboglabra, followed by B. juncea, B. chinensis and B. alboglabra after they were raised 5 generations, respectively. Glutathione-S-transferase (GSTs) and carboxylesterase (CarE ) indicated significant difference at 0. 05 level. The most activity of GSTs and CarE was showed in the DBM fed with B. alboglabra. All results indicated that feeding on different host plants could affect the pesticide susceptibility and detoxification enzyme activity of DBM. The results showed important reference value to IPM and resistance mechanism of DBM.