Effects of triflumuron on the two-spotted spider mite, Tetranychus urticae (Acari: Tetranichydae).
The effects of triflumuron on the mortality, fecundity, and fertility of the two-spotted spider mite, Tetranychus urticae, were evaluated in the laboratory. No differences in toxicity for larvae, protonymphs and deutonymphs were observed, but immature stages were 3.8-times more susceptible than adults at the LC50. The compound exhibited a direct contact ovicidal activity influenced by eggs age. 48-72 h old eggs were significantly more sensitive than eggs of the other age classes. No hatch inhibition was observed in eggs laid by treated adult females using a sublethal dose at two physiological times (<12 and 48-72 h old). However. fecundity decreased in younger treated females, but it increased in the older-ones. The toxicity for immatures and eggs, and the sublethal effects described suggest that triflumuron could be an interesting incorporation in integrated pest programs of T. urticae.
Saenz de Cabezón
F J
FJ
Departamento de Agricultura y Alimentación, Centro de Enseñanazas Científicas y Técnicas, Unidad de Protección de Cultivos., Universidad de La Rioja, Logroño, Spain.
Pérez-Moreno
I
I
Marco
V
V
D000818:Animals; D001549:Benzamides / Q000494:pharmacology*; D005260:Female; D005298:Fertility; D007306:Insecticides / Q000494:pharmacology*; D007814:Larva; D009758:Nymph; D027805:Phaseolus; D040102:Tetranychidae / Q000187:drug effects* / Q000502:physiology; D013983:Tick Control / Q000379:methods
D001549:Benzamides; D007306:Insecticides; C023957:triflumuron