title: 4-pyridyl carbonyl and related compounds as thrips lures: effectiveness for onion thrips and new zealand flower thrips in field experiments.
abstract: On the basis of structural and/or aroma analogies to known thrips (Thysanoptera: Thripidae) lures, 35 compounds (18 pyridine derivatives, 13 benzene derivatives, and 4 other compounds), consisting of both synthetic and naturally occurring compounds, were screened for their ability to bring about increased thrips capture in field experiments using water traps in Canterbury, New Zealand. Most of the thrips caught were New Zealand flower thrips (NZFT) (Thrips obscuratus) or onion thrips (OT) (Thrips tabaci). The greatest increase in capture for NZFT (158 times for female symbol cf. to water control) was for the known lure ethyl nicotinate, a 3-pyridyl ester. Ethyl isonicotinate, the 4-pyridyl regioisomer of ethyl nicotinate, not previously reported as a thrips lure, provided the greatest increases in capture for OT (31 times) of any of the compounds tested, significantly more than ethyl nicotinate. Other 4-pyridyl carbonyl compounds, including ethyl 4-pyridyl ketone, also increased OT capture significantly. The natural floral compound cis-jasmone, which increased trap capture of NZFT (female symbol 42 times, male symbol 25 times) but not OT, is reported as a thrips lure for the first time.
authors.affiliation: New Zealand Institute for Crop and Food Research Limited, New Zealand. teulond@crop.cri.nz
authors.forename: David A J
authors.initials: DA
authors.lastname: Teulon
authors.forename: Melanie M
authors.initials: MM
authors.lastname: Davidson
authors.forename: Duncan I
authors.initials: DI
authors.lastname: Hedderley
authors.forename: Dale E
authors.initials: DE
authors.lastname: James
authors.forename: Callum D
authors.initials: CD
authors.lastname: Fletcher
authors.forename: Lesley
authors.initials: L
authors.lastname: Larsen
authors.forename: Vanessa C
authors.initials: VC
authors.lastname: Green
authors.forename: Nigel B
authors.initials: NB
authors.lastname: Perry
mesh_terms: D035264:Flowers; D007300:Insect Control / Q000379:methods*; D009520:New Zealand; D019697:Onions; D010675:Pheromones; D011728:Pyridones
chemical_list: C523341:4-pyridyl carbonyl; D010675:Pheromones; D011728:Pyridones; C010411:insect attractants