数字农科院2.0

Behavioral Responses Ofthrips Hawaiiensis(Thysanoptera: Thripidae) To Volatile Compounds Identified Fromgardenia Jasminoidesellis (Gentianales: Rubiaceae)

文献类型： 外文期刊

作者： Cao, Y; Wang, J; Germinara, GS; Wang, LJ; Yang, H; Gao, YL; Li, C

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关键词： Olfactory Responses; Flower Host Plant; Voc; Y-Tube Olfactometer; Six-Arm Olfactometer

期刊名称： INSECTS

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年卷期： 2020 年 11 卷 7 期

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收录情况： JCR（2021版）

摘要： Thrips hawaiiensisis a common thrips pest of various plant flowers with host preference. Plant volatiles provide important information for host-searching in insects. We examined the behavioral responses ofT. hawaiiensisadults to the floral volatiles ofGardenia jasminoidesEllis,Gerbera jamesoniiBolus,Paeonia lactifloraPallas, andRosa chinensisJacq. in a Y-tube olfactometer.T. hawaiiensisadults showed significantly different preferences to these four-flower plants, with the ranking ofG. jasminoides>G.jamesonii>P. lactiflora >= R. chinensis. Further, 29 components were identified in the volatile profiles ofG. jasminoides, and (Z)-3-hexenyl tiglate (14.38 %), linalool (27.45 %), and (E3,E7)-4,8,12-trimethyltrideca-1,3,7,11-tetraene (24.67 %) were the most abundant. Six-arm olfactometer bioassays showed thatT. hawaiiensishad significant positive responses to (Z)-3-hexenyl tiglate, linalool, and (E3,E7)-4,8,12-trimethyltrideca-1,3,7,11-tetraene tested at various concentrations, with the most attractive ones being 10(-3)mu L/mu L, 10(-2)mu L/mu L and 100 mu g/mu L for each compound, respectively. In pairing of these three compounds at their optimal concentrations,T. hawaiiensisshowed the preference ranking of (Z)-3-hexenyl tiglate > linalool > (E3,E7)-4,8,12-trimethyltrideca-1,3,7,11-tetraene. Large numbers ofT. hawaiiensishave been observed onG. jasminoidesflowers in the field, which might be caused by the high attraction of this pest toG. jasminoidesfloral volatiles shown in the present study. Our findings shed light on the olfactory cues routing host plant searching behavior inT. hawaiiensis, providing important information on howT. hawaiiensistargets particular host plants. The high attractiveness of the main compounds (e.g., linalool, (E3,E7)-4,8,12-trimethyltrideca-1,3,7,11-tetraene, particular (Z)-3-hexenyl tiglate) identified from volatiles ofG. jasminoidesflowers may be exploited further to develop novel monitoring and control tools (e.g., lure and kill strategies) against this flower-inhabiting thrips pest.

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