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Insects

Title:		Efficacy of Kairomone Lures to Attract Parasitoids of Halyomorpha halys
Author(s):		Richardson KV; Alston DG; Spears LR;
Address:		"Department of Biology, Utah State University, Logan, UT 84322, USA"
Journal Title:		Insects
Year:		2023
Volume:		20230125
Issue:		2
Page Number:		-
DOI:		10.3390/insects14020125
ISSN/ISBN:		2075-4450 (Print) 2075-4450 (Electronic) 2075-4450 (Linking)
Abstract:		"In its native range, Halyomorpha halys (Stal) is suppressed by parasitoids in the genus Trissolcus (Hymenoptera: Scelionidae). Trissolcus native to Utah have demonstrated low parasitism of H. halys, while adventive Trissolcus japonicus (Ashmead) have shown parasitism of up to 20%. Custom rubber septa lures containing stink bug kairomones, n-tridecane (attractant), and (E)-2-decenal (repellent), at 100%, 90%, and 80% levels of attractant (10 mg load rate), were placed adjacent to sentinel H. halys egg masses in northern Utah field trials. Egg masses were evaluated for the presence and intensity (proportion of parasitized eggs) of parasitism. Parasitism by T. japonicus and T. euschisti (Ashmead) was low; however, the 100% lure showed double the parasitism of the control and more than three times that of the 90% and 80%. Two-way choice mesocosm trials in the laboratory evaluated previous lures and a lower load rate of 5 mg-100% attractant treatment. Lures of 10 mg at 100% and 80% were more attractive to T. japonicus than the control, while 5 mg at 100% and 10 mg at 90% showed no significant attraction. Our results support a proof-of-concept of rubber septa as release devices for kairomones to attract T. japonicus and provide a baseline for future field-based studies"
Keywords:		Pentatomidae Scelionidae Trissolcus biological control chemical ecology invasive species kairomone parasitoid;
Notes:		"PubMed-not-MEDLINERichardson, Kate V Alston, Diane G Spears, Lori R eng 2016-51181-25409/National Institute of Food and Agriculture/ G219-22-W8615/National Institute of Food and Agriculture/ 201182/Utah Department of Agriculture and Food/ Switzerland 2023/02/26 Insects. 2023 Jan 25; 14(2):125. doi: 10.3390/insects14020125"