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Insecticide‐mediated behavioral avoidance by bean bug, R iptortus pedestris ( H eteroptera: A lydidae)
Author(s) -
Maharjan Rameswor,
Jung Chuleui
Publication year - 2015
Publication title -
entomological research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.421
H-Index - 20
eISSN - 1748-5967
pISSN - 1738-2297
DOI - 10.1111/1748-5967.12113
Subject(s) - olfactometer , biology , pest analysis , toxicology , olfactory cues , host (biology) , bifenthrin , pesticide , horticulture , botany , agronomy , ecology , olfaction
Bean bug, R iptortus pedestris ( F abricius) ( H eteroptera: A lydidae), is an economically important pest of soybean and tree fruit. Behavioral responses of R . pedestris to olfactory cues from insecticide‐treated foliage were assessed in a Y ‐tube olfactometer. Ten insecticides were applied to kidney bean plants at the recommended dosage, and then bug avoidance was assessed at 0, 3, 5, 7 and 13 days after treatment ( DAT ). Each bug was allowed 5 min to choose one of the olfactometer's arms. Even though the degree of avoidance was variable to the insecticides tested, bean bugs significantly avoided the insecticide‐treated leaf. The pyrethroid bifenthrin was the most avoided of the insecticides tested. In all treatments, avoidance decreased as DAT increased. Also, the movement speed was higher to the untreated leaf than to the insecticide‐treated leaf. The degree of avoidance was positively correlated to the vapor pressure of the chemical; this finding implies the interaction of the treated chemicals and plant volatiles may be used as cues for bean bug selection of the host‐plant.