REGULAR ARTICLE
Side effects of acequinocyl on predatory mite Typhlodromus pyri Scheuten (Acari: Phytoseiidae)
Ewa Puchalska, Marlena Piotrowska
Commun. Biometry Crop Sci. (2016) 11 (2), 140-148.
ABSTRACT
Contact and residual effects of acequinocyl on life parametres of Typhlodromus pyri
females were studied under laboratory conditions. The pesticide toxicity varied depending
on the mode of exposure and T. pyri population origin. Acequinocyl proved to be highly
toxic to T. pyri females from U-population that had never been in contact with any pesticide.
100% mortality of these females was observed on the third day after spraying leaves alone
(residual effect) and on the fifth day after females’ treatment (direct-contact effect).
Another tested population of T. pyri (S-population) was established with individuals collected
in commercial apple orchard where various pesticides were often applied. Using Baillod and
Lenfant formula to estimate global effect of acequinocyl on S-population of T. pyri,
the acaricide was established as slightly toxic for exposure to leaf surface residues,
with GE-value 26.86, and moderately toxic when exposed by direct contact, with GE-value 46.67.
Key Words: predatory mite; toxicity; side effects; acaricides.
