James Villegas, Towles, Tyler, Davis, Jeff A.
Close-up photo of redbanded stinkbug. The underside photo (right) shows the characteristic spine protruding between the hind legs and the piercing/sucking mouthparts.
The standard recommendation for control of southern green, green, and brown stinkbugs is to terminate insecticide applications once soybean plants reached the R6.5 growth stage (R6 plus 7-10 days). Feeding by these stinkbug species after R6 typically does not reduce yields. However, soybeans must be protected from redbanded stinkbugs until at least R7 because this pest continues to feed on beans that have dried down. Since redbanded stinkbugs pierce deeper into pods, feeding injury after R6 can cause reductions in weights and quality that may lead to elevator dockage. In fact, previous studies have documented an average seed weight reduction of 10% if redbanded stinkbugs are not controlled past R6.5. The two most important factors to consider when putting out your final treatments, particularly when tank-mixing pyrethroids with acephate or neonicotinoid, are the pre-harvest interval (PHI) and the maximum active ingredient (a.i.) per acre allowed per growing season. See more details in the table below. In addition, soybean that won’t be harvested this year due to poor seed quality/sprouting will be a potential site for redbanded stinkbugs to survive. Destroying habitat will reduce overwintering sites, thereby reducing stinkbug populations that might survive the winter.
Insecticides used for control of redbanded stinkbugs.
|Insecticide||Active Ingredient||PHI (days)||Restrictions|
|Orthene||acephate||14||maximum of 2 lb a.i. per acre per crop cycle|
|Endigo ZC||thiamethoxam + lambda-cyhalothrin||30||not to exceed 9 fl oz of Endigo ZC or 0.06 lb a.i. of lambda-cyhalothrin-containing products or 0.125 lb a.i. of foliar-applied thiamethoxam-containing products per acre per growing season|
|Brigade||bifenthrin||18||not to exceed 19.2 fl oz per acre of Brigade or 0.3 lb a.i. per acre per crop season|
|Hero||bifenthrin + zeta-cypermethrin||21||not to exceed 41.2 fl oz per acre of Hero or 0.4 lb a.i. per acre per crop season|
|Leverage 360||imidacloprid + beta-cyfluthrin||21||not to exceed 9 fl oz per acre of Leverage 360 (0.07 lb ai of beta-cyfluthrin per acre and 0.14 lb a.i. of imidacloprid per acre) per crop season|
|Belay||clothianidin||21||not to exceed 0.2 lb a.i. of clothianidin per acre per year|
The LSU AgCenter and the LSU College of Agriculture