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United States Department of Agriculture

Agricultural Research Service

Research Project: Biologically-based Management of Arthropod Pests in Small Fruit and Nursery Crops

Location: Horticultural Crops Research

Title: Two pests overlap: Drosophila suzukii (Diptera: Drosophilidae) use of fruit exposed to Halyomorpha halys (Hemiptera: Pentatomidae))

Author
item Woltz, Megan
item Wiman, Nik
item Lee, Jana

Submitted to: Journal of Economic Entomology
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 5/15/2017
Publication Date: N/A
Citation: N/A

Interpretive Summary: Spotted wing drosophila (SWD), and brown marmorated stink bug (BMSB) are global pests. Both pests may co-occur on raspberry and blueberry, and we investigated whether fruit recently exposed to BMSB would affect whether SWD would use the fruit. Laboratory tests presented SWD with BMSB-fed and unfed raspberries and blueberries immediately after or three days after BMSB feeding. The number of resulting SWD eggs, larvae and/or pupae were counted. Field studies compared natural SWD infestation among BMSB-exposed and unexposed raspberries. The number of SWD among fed and unfed fruit was similar in lab studies. Moreover, there was no relationship between the intensity of BMSB feeding, as estimated by the number of punctures, and how many eggs SWD laid on blueberry. Natural infestation by SWD in the field was similar among raspberries previously or simultaneously exposed to BMSB. Thus, SWD appears to use un/exposed fruit similarly.

Technical Abstract: Spotted wing drosophila, Drosophila suzukii (Matsumura) (Diptera: Drosophilidae), and brown marmorated stink bug, Halyomorpha halys (Stål) (Hemiptera: Pentatomidae) are global economic pests. Both pests may co-occur on small fruits, and we investigated whether fruit recently exposed to H. halys would affect subsequent host use by D. suzukii. Laboratory no-choice and choice tests presented D. suzukii with H. halys-fed and unfed raspberries and blueberries immediately after or three days after H. halys feeding. Resulting D. suzukii eggs, larvae and/or pupae were counted. Field studies compared natural D. suzukii infestation among H. halys-exposed and unexposed raspberries. The number of D. suzukii among fed and unfed fruit was similar in lab studies. Moreover, there was no relationship between the intensity of H. halys feeding, as estimated by the number of stylet sheaths, and D. suzukii oviposition on blueberry. Natural infestation by D. suzukii in the field was similar among raspberries previously or simultaneously exposed to H. halys. Thus, D. suzukii appear to use un/exposed fruit similarly, and growers may expect the damage to be additive when both pests are present.

Last Modified: 05/25/2017
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