The effect of pyridine compounds on the capture of thrips was examined in an Auckland New Zealand capsicum greenhouse in 2004 Yellow sticky traps were positioned just above the crop canopy in a rectangular array with 6 traps per compound and 6 control traps 2024 m apart and left for 24 h Most thrips found on traps were Frankliniella occidentalis (>99) Fourteen times more female F occidentalis were captured on traps with methyl isonicotinate or ethyl isonicotinate than on controls Sticky traps treated with methyl 4pyridyl ketone also caught more female F occidentalis than controls (45) Sticky traps with methyl isonicotinate caught more male F occidentalis (up to 52) than controls Ethyl2chloropyridine4carboxylate and ethyl nicotinate did not increase trap catches of either sex The results demonstrated that selected pyridine compounds have the potential to improve trap capture of F occidentalis in a covered crop

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Used in isolation several odour chemicals are known to increase trap capture of some thrips especially flowerinhabiting species This study examined the combined use of two structurally distinct odour chemicals both known to increase thrips trap capture in isolation Field bioassays using water traps were undertaken at two sites in New Zealand to target different thrips species Water traps had (1) no odour (water) (2) panisaldehyde only (3) methyl isonicotinate only (4) panisaldehyde and methyl isonicotinate mixed together in the same vial or (5) panisaldehyde and methyl isonicotinate placed separately in adjacent vials Thrips tabaci was the most common thrips species trapped at both sites (>92) Most odour treatments increased trap capture of T tabaci compared with the controls (panisaldehyde by 18 and 7 methyl isonicotinate by 5 and 30) but treatments with the two chemicals combined did not increase trap capture above the level of methyl isonicotinate alone at both sites