1a.Objectives (from AD-416):
Objective 1: To establish a baseline for susceptibility of tarnished plant bug populations in the Mississippi Delta to novaluron.
Objective 2: To monitor tarnished plant bug populations over a three-year period for potential shifts in susceptibility due to increased exposure in cotton and other crops.
1b.Approach (from AD-416):
Baseline susceptibility to novaluron will be determined using glass-vial bioassays with tarnished plant bug adults collected from weed hosts found near cotton fields at 10-20 locations in the Mississippi Delta. Tarnished plant bug populations will continue to be monitored for a three-year period for potential shifts in susceptibility caused by increased exposure to novaluron.
In 2012, nine populations of tarnished plant bugs from Mississippi and Arkansas were screened against novaluron in a glass vial dose-mortality bioassay. While laboratory responses were variable, no differences were observed among the ten populations, and none differed from the check (a population from Crossett, AR, in a non-agricultural area). Project has terminated due the departure of the ARS investigator.