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Submitted to: Florida Entomologist
Publication Type: Peer Reviewed Journal Publication Acceptance Date: 5/4/2001 Publication Date: N/A Citation: N/A Interpretive Summary: Yellow pyramidal traps baited with an aggregation pheromone offer a more convenient method of sampling some stink bug pest species in pecan. Over time, however, these traps must be sampled frequently to prevent stink bugs from escaping from traps. This study demonstrates that the necessity of frequently sampling stink bug traps can be decreased by adding an insecticide to the trap. Stink bugs captured in traps with the insecticide are killed, thus increasing trap efficiency. Additionally, traps with insecticide did not repel stink bugs. Technical Abstract: Some stink bugs are economic pests of pecan throughout the southeastern U.S. Early to midseason feeding damage usually causes fruit abscission, whereas, late season punctures induce localized, black lesions on the kernel. These bitter kernels must be removed at postharvest processing. Stink bugs in pecan are hard to sample. Development of a stink bug trap coupled with an aggregation pheromone for Euschistus stink bugs provides a convenient way to sample Euschistus spp. in pecan. Although stink bugs are attracted to traps, frequent sample intervals are required because they escape. About 90 percent of E. tristigmus escaped from traps after 24 hrs. To determine effect of sampling interval on trap capture, pheromone-baited traps were monitored 1x/week (w/ and w/o addition of insecticide) and 3x/week. Sampling traps 1x/week (w/o insecticide) vs 3x/week did not affect trap capture of E. servus or E. tristigmus. However, trap capture of both species in traps sampled 1x/week (w/ insecticide) was significantly improved vs traps sampled 1x/week (w/o insecticide). In fact, sampling traps 1x/week (w/ insecticide) resulted in more E. servus captures than when traps were sampled 3x/week. A similar trend was seen for E. tristigmus. |
