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Susceptibility of Redbanded and Conchuela Stink Bugs from the Texas Lower Rio Grande Valley to Organophosphate and Pyrethroid Insecticides

Permanent URL:
http://handle.nal.usda.gov/10113/57409
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Abstract:
We report the susceptibility of 2 stink bug species, redbanded stink bug (RBSB), Piezodorus guildinii, (Westwood) and conchuela stink bug, Chlorochroa ligata, (Say) collected in the Texas Lower Rio Grande Valley to selected pyrethroid and organophosphate technical grade insecticides. The adult glass vial test (AVT) was used and the most commonly-used insecticides on a variety of crops were evaluated. The baseline susceptibility of the conchuela stink bug as reported by LC50 and LC90 values (95 % confidence limits) shows that it is highly susceptible to the organophosphates, dicrotophos (Bidrin®), acephate (Orthene®) and the pyrethroids, deltamethrin, (Decis®) and lambda-cyhalothrin (Karate®). The RBSB has a history of being hard to kill in soybean, and the reported LC50 in these assays of 5.06 (3.74 - 7.26) and a LC90 of 26.9 (15.23 – 89.91) for acephate are higher than those reported for Louisiana, where the RBSB has a history of being difficult to control. The RBSB should continue to be monitored for insecticide resistance using the AVT especially with the organophosphate insecticides. Baseline values for susceptibility of RBSB and conchuela stinkbug to insecticides tested are important for future comparisons to monitor development of resistance.
Author(s):
J. Scott Armstrong , Shoil M. Greenberg , Juan D. López Jr.
Subject(s):
Chlorochroa ligata , Piezodorus guildinii , acephate , cultivars , deltamethrin , dicrotophos , glass , insecticide resistance , lambda-cyhalothrin , lethal concentration 50 , monitoring , normal values , pyrethrins , soybeans , valleys , Louisiana , Texas
Source:
Subtropical Plant Science 2012 12 1 v.64
Language:
English
Year:
2012
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
Rights:
Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.