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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 400700 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:2019-03-12
Downloads:0

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