title: Residual toxicity and sublethal effects of chlorantraniliprole on Plutella xylostella (lepidoptera: plutellidae).
abstract: BACKGROUND
  The diamondback moth (DBM), Plutella xylostella (L.), is the most important pest of cruciferous vegetables in the world. Chlorantraniliprole is a novel anthranilic diamide insecticide registered for the control of lepidopteran pests. The dose response, residual toxicity and sublethal effects of chlorantraniliprole applied for 48 h at LC₁₀ (0.02 mg L(-1) ) and LC₂₅ (0.06 mg L(-1) ) on P. xylostella were investigated.
  
  
  RESULTS
  Leaf-dip bioassays showed that chlorantraniliprole had a high level of toxicity against larvae of P. xylostella, and the 48 h LC₅₀ values were 0.23 and 0.25 mg L(-1) for a susceptible and field strain respectively. Chlorantraniliprole also had a long-lasting effect when the larvae were exposed to chlorantraniliprole field sprayed on radish seedlings. Sublethal effects of chlorantraniliprole were indicated by reduced pupation, pupal weight and adult emergence rates. There was also an increase in the duration of female preoviposition period, decreased fecundity and egg hatch and decreased survival rates of the offspring. The mean values of the net reproductive rate (R₀), intrinsic rate of increase (r(m)), finite rate of increase (λ) were significantly lower in the treatment than in control groups.
  
  
  CONCLUSIONS
  These results indicate that chlorantraniliprole is effective against P. xylostella. The sublethal concentrations of chlorantraniliprole may reduce the population growth of P. xylostella by decreasing its survival and reproduction, and by delaying its development.
authors.affiliation: Department of Entomology, China Agricultural University, Beijing, China.
authors.forename: Wensu
authors.initials: W
authors.lastname: Han
authors.forename: Shufa
authors.initials: S
authors.lastname: Zhang
authors.forename: Fuying
authors.initials: F
authors.lastname: Shen
authors.forename: Meng
authors.initials: M
authors.lastname: Liu
authors.forename: Chengcai
authors.initials: C
authors.lastname: Ren
authors.forename: Xiwu
authors.initials: X
authors.lastname: Gao
mesh_terms: D000818:Animals; D005260:Female; D007305:Insecticide Resistance; D007306:Insecticides / Q000633:toxicity*; D008297:Male; D009036:Moths / Q000187:drug effects* / Q000254:growth & development; D010935:Plant Diseases / Q000469:parasitology*; D031224:Raphanus / Q000469:parasitology; D062367:ortho-Aminobenzoates / Q000633:toxicity*
chemical_list: D007306:Insecticides; D062367:ortho-Aminobenzoates; C517733:chlorantranilipole