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Sublethal effects of hexaflumuron on development and reproduction of the diamondback moth, Plutella xylostella (Lepidoptera: Yponomeutidae)
Author(s) -
Mahmoudvand Mohammad,
Abbasipour Habib,
Garjan Aziz Sheikhi,
Bandani Ali Reza
Publication year - 2011
Publication title -
insect science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.991
H-Index - 45
eISSN - 1744-7917
pISSN - 1672-9609
DOI - 10.1111/j.1744-7917.2011.01411.x
Subject(s) - plutella , diamondback moth , biology , fecundity , population dynamics , pupa , lepidoptera genitalia , larva , instar , reproduction , toxicology , population , botany , ecology , medicine , environmental health
Effects of hexaflumuron at 10% lethal concentration (LC 10 ) and LC 25 on development and reproduction parameters of the diamondback moth, Plutella xylostella (Linnaeus, 1753) (Lep.: Yponomeutidae) were investigated. Estimated LC 50 , LC 10 and LC 25 values of leaf dip bioassay of hexaflumuron on the third instar larvae of the P. xylostella were 1.48, 0.59 and 0.91 mg/L, respectively. Hexaflumuron decreased pupal weight in the parent generation at sublethal concentrations but in the offspring generation, this effect was not observed. Sublethal concentrations increased egg, first and second larval instar and pupa developmental time and shortened life span of adults, but did not change the third and fourth larval instars and pre‐pupa developmental period. Also fecundity of females reduced significantly but hatchability of treatments and control were similar. Survival rate of pre‐adult stages declined significantly at LC 25 concentration. Reproduction parameters such as reproductive rate ( R 0 ) and intrinsic rate of increase in sublethal concentrations were significantly lower compared with control, but gross reproduction rate (GRR) at the LC 10 concentration was increased and it could be hormoligosis. Also hexaflumuron significantly increased doubling time (Dt). We conclude that the sublethal effects of hexaflumuron might exhibit significant effects on the population dynamics of P. xylostella .