Effect of sublethal concentrations of insecticides associated with NaCl and KCl on feeding behavior and mortality of Euschistus heros and Diceraeus melacanthus (Hemiptera: Pentatomidae)

Stink bugs are important pests of highly profitable agricultural crops worldwide, and the use insecticides remains main strategy for their control. The objectives this study were to evaluate behavioral aspects Euschistus heros Diceraeus melacanthus through feeding after exposure chloride solutions (NaCl KCl), as well control efficacy in combination with salt. Two bioassays performed stink exposed treated substrate: i) preference by salivary sheath counting a free choice test solutions, using bean pod or corn seedling substrate newly emerged E. D. adults, respectively; ii) comparative efficiency five synthetic associated NaCl KCl mortality 4th instar nymphs (N4). Pre-determined sublethal (LC25) median lethal (LC50) concentrations commercially available (Lfn), buprofezin (Bpf), pyriproxyfen (Ppx), chlorantraniliprole (Ctn) spinosad (Spn) used. For each species insecticide, treatments pure LC25, LC25 + 5% m/m, LC50, distilled water (dH2O) Corn seedlings saline solution had reduced sheaths from melacanthus. Ctn (0.63 mL L-1) LC50 (1.16 similar more efficient terms N4s than any other treatment. association Spn (0.37 only (0.90 was that compared treatments. insecticide used have potential bug pest control, thus available, easy-to-find, low-cost salts may represent good