Toxicity assessment of four insecticides with different modes of action on pupae and adults of Eriopis connexa (Coleoptera: Coccinellidae), a relevant predator of the Neotropical Region.

SCHNEIDER, MARCELA INÉS; DESNEUX NICHOLAS; FOGEL, MARILINA; LADUX LORENA; RIMOLDI, FEDERICO; RONCO, ALICIA

ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH

SPRINGER HEIDELBERG

Lugar: HEIDELBERG; Año: 2016 vol. 23 p. 14918 - 14926

0944-1344

Pesticides can be toxic to nontarget organisms includingthe natural enemies of agricultural pests, thus reducingthe biodiversity of agroecosystems. The lethal and sublethaleffects of four insecticides with different modes of action?pyriproxyfen, teflubenzuron, acetamiprid, and cypermethrin?were evaluated on pupae and adults of Eriopis connexa, an effectivepredator in horticultural crops. Pupal survival was reducedby pyriproxyfen (26 %) and cypermethrin (41 %).Malformations in adults emerged from treated pupae were observedafter acetamiprid (82.7 and 100 % for 100 and 200 mga.i./l, respectively), pyriproxyfen (48.6 %), and cypermethrin(13.3 %) treatments. A longer mean oviposition time was alsoobserved in adults emerged from pupae treated withcypermethrin. Moreover, the latter insecticide as well asteflubenzuron did not reduce reproductive parameters, whereasfemales emerged from pyriproxyfen-treated pupae were not beable to lay eggs even when females showed large abdomens.Upon exposure of adults, survival was reduced to approximately