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Colour preference and potato cultivar oviposition choice by onion thrips, Thrips tabaci (Thysanoptera: Thripidae)
Citation
Westmore, GW and Allen, GR and Wilson, CR, Colour preference and potato cultivar oviposition choice by onion thrips, Thrips tabaci (Thysanoptera: Thripidae), Journal of Asia-Pacific Entomology, 22, (1) pp. 25-32. ISSN 1226-8615 (2019) [Refereed Article]
Copyright Statement
Copyright 2018 Korean Society of Applied Entomology
DOI: doi:10.1016/j.aspen.2018.11.019
Abstract
Thrips tabaci (Lindeman) is an important polyphagous pest, and vector of Tomato spotted wilt virus responsible for sporadic, but devastating epidemics in potato. T. tabaci shows significant preferential differences between potato cultivars that may be important for field resistance. To investigate the role of visual cues in host choice we tested colour preference using two-choice assays. Thrips tabaci showed a significant preference for mid-green over red, blue, and white coloured cards, a preference for both light-green and mid-green over dark-green, and light-green over yellow, but no preferential difference between mid-green and yellow, and between light-green and mid-green. Analysis of the spectral reflectance of potato cultivars differing in thrips preference, revealed significant differences within the 400–700 nm wavelengths. In most cases cultivars preferred by T. tabaci had lighter green foliage and higher reflectance at 552 nm, and thus colour preference may be important for host selection. Oviposition choice of T. tabaci for potato cultivars was determined from counts of larvae and unhatched eggs from leaf disks under choice and no-choice conditions. In contrast to the colour choice experiments, onion thrips showed oviposition preference for cultivars with darker green foliage and lower reflectance at 552 nm.
Item Details
| Item Type: | Refereed Article |
|---|---|
| Keywords: | colour preference, spectral assessment, TSWV vector, Solanum tuberosum, Trips tabaci |
| Research Division: | Agricultural and Veterinary Sciences |
| Research Group: | Crop and Pasture Production |
| Research Field: | Crop and Pasture Protection (Pests, Diseases and Weeds) |
| Objective Division: | Plant Production and Plant Primary Products |
| Objective Group: | Horticultural Crops |
| Objective Field: | Vegetables |
| UTAS Author: | Westmore, GW (Mr Guy Westmore) |
| UTAS Author: | Allen, GR (Associate Professor Geoff Allen) |
| UTAS Author: | Wilson, CR (Professor Calum Wilson) |
| ID Code: | 129720 |
| Year Published: | 2019 |
| Deposited By: | Agriculture and Food Systems |
| Deposited On: | 2018-12-17 |
| Last Modified: | 2020-04-03 |
| Downloads: | 0 |
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