New Zealand Plant Protection 65 (2012): 120-125
The impact of tospovirus infection on the behaviour of western flower thrips (Frankliniella occidentalis) was evaluated in a Y-tube olfactometer. The response of female western flower thrips, with or without a tospovirus (Tomato spotted wilt virus, TSWV) to a thrips lure (methyl isonicotinate, MI), and chrysanthemum buds was recorded. Compared to the blank arm, significantly more thrips chose the odour-laden arm of the Y-tube when it contained MI (65%, P<0.01). However, chrysanthemum buds did not significantly (P>0.16) increase the percentage of thrips that chose the odour-laden arm over and above the clean-air arm, but thrips (virus-free and infected) moved more quickly to the end of either arm when a bud was present. The virus status of thrips was confirmed with RT-PCR. The presence of the virus in the vector did not substantially affect the behavioural response of the vector to a lure or host-plant material (P>0.4).
Keywords: Frankliniella occidentalis, vector, tospovirus, methyl isonicotinate, semiochemical, host plant.
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Copyright © 2012 New Zealand Plant Protection Society (Inc.).