Evaluation of thrips resistance in pepper to control Tomato spotted wilt virus infection
The objective of this study was to analyse the effect of thrips ( F. occidentalis ) resistance in pepper ( Capsicum ) on the spread of Tomato spotted wilt virus (TSWV). Results demonstrate that the rate of primary TSWV-infection is effectively limited in a thrips-resistant (TR) pepper crop compared to a thrips-susceptible (TS) crop, and that this is based on a decreased preference of thrips for TR plants. Secondary TSWV-infections were effectively restricted in the TR pepper crop and this is based on a greatly reduced thrips population built-up.The effect of thrips resistance on the spread of TSWV was also analysed in a virus-resistant genotype. TSWV-resistant plants respond with a hypersensitive reaction after infection with TSWV, resulting in necrotic local lesions on leaves and fruits. Under the same infection pressure, fewer local lesions were found in the thrips-resistant accession PI 152225 than in the thrips-susceptible PI 159236 accession, indicating a synergistic effect of thrips- and virus resistance.Studies presented in the last part of the thesis show mutual benefits for F. occidentalis and TSWV from the attraction to virus-infected plants. Attraction resulted in more offspring on these plants and thereby enhancing the chance for virus transmission. Besides, thrips developed significantly faster on TSWV-infected plants than on non-infected plants. It was demonstrated that volatiles released from TSWV-infected plants may be involved in the attraction of thrips to TSWV-infected plants.
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| Format: | Doctoral thesis biblioteca |
| Language: | English |
| Subjects: | capsicum annuum, frankliniella occidentalis, insect pests, pest resistance, sweet peppers, thrips, tomato spotted wilt virus, vector control, insectenplagen, paprika, plaagresistentie, tomatenbronsvlekkenvirus, vectorbestrijding, |
| Online Access: | https://research.wur.nl/en/publications/evaluation-of-thrips-resistance-in-pepper-to-control-tomato-spott |
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