caa a22 4500 477134556 CHVBK 20180405111714.0 cr unu---uuuuu 170330e19971101xx s 000 0 eng 10.1023/A:1003080308129 doi (NATIONALLICENCE)springer-10.1023/A:1003080308129 Seasonal variation in resistance of chrysanthemum cultivars to Frankliniella occidentalis (Thysanoptera: Thripidae) [Elektronische Daten] [Willem de Kogel, Marieke van der Hoek, Marian Dik, Barbara Gebala, Folchert van Dijken, Chris Mollema] Seasonal variation in the level of host plant resistance can have important consequences for the repeatability of tests to measure host plant resistance to insect pests. In the present study, the levels of resistance to Frankliniella occidentalis of a susceptible and a partially resistant cultivar of chrysanthemum, Dendranthema grandiflora, were determined throughout the year. Thrips damage, reproduction and adult female survival were determined on excised leaves in Petri dishes under uniform conditions. Strong seasonal fluctuations were observed in these three characteristics. On leaves from plants grown in winter, damage, reproduction, and survival were higher than on leaves from plants grown in summer. Clear differences in resistance were observed between the susceptible and the partially resistant cultivar on leaves from plants grown in winter, while differences disappeared in summer. Damage on both cultivars and survival on the susceptible cultivar were negatively correlated with mean daily solar radiation during plant growth, suggesting that the level of resistance depends on light intensity during plant growth. This was confirmed in an experiment carried out in summertime with shaded and unshaded plants. Leaves from control plants, grown under high light intensity had a higher level of resistance than leaves from shaded plants grown under reduced light intensity. There were clear differences in resistance between the cultivars under shaded conditions (low light intensity), but not under unshaded control conditions (high light intensity). Kluwer Academic Publishers, 1997 chrysanthemum nationallicence Frankliniella occidentalis nationallicence host plant resistance nationallicence light intensity nationallicence seasonal variation nationallicence shading nationallicence de Kogel Willem Dlo-Centre for Plant Breeding and Reproduction Research (CPRO-DLO), P.O. Box 16, 6700 AA, Wageningen, The Netherlands aut van der Hoek Marieke Dlo-Centre for Plant Breeding and Reproduction Research (CPRO-DLO), P.O. Box 16, 6700 AA, Wageningen, The Netherlands aut Dik Marian Dlo-Centre for Plant Breeding and Reproduction Research (CPRO-DLO), P.O. Box 16, 6700 AA, Wageningen, The Netherlands aut Gebala Barbara Dlo-Centre for Plant Breeding and Reproduction Research (CPRO-DLO), P.O. Box 16, 6700 AA, Wageningen, The Netherlands aut van Dijken Folchert Dlo-Centre for Plant Breeding and Reproduction Research (CPRO-DLO), P.O. Box 16, 6700 AA, Wageningen, The Netherlands aut Mollema Chris Dlo-Centre for Plant Breeding and Reproduction Research (CPRO-DLO), P.O. Box 16, 6700 AA, Wageningen, The Netherlands aut Euphytica Kluwer Academic Publishers 97/3(1997-11-01), 283-288 0014-2336 97:3<283 1997 97 10681 https://doi.org/10.1023/A:1003080308129 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1003080308129 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- de Kogel Willem Dlo-Centre for Plant Breeding and Reproduction Research (CPRO-DLO), P.O. Box 16, 6700 AA, Wageningen, The Netherlands aut NATIONALLICENCE 700 1- van der Hoek Marieke Dlo-Centre for Plant Breeding and Reproduction Research (CPRO-DLO), P.O. Box 16, 6700 AA, Wageningen, The Netherlands aut NATIONALLICENCE 700 1- Dik Marian Dlo-Centre for Plant Breeding and Reproduction Research (CPRO-DLO), P.O. Box 16, 6700 AA, Wageningen, The Netherlands aut NATIONALLICENCE 700 1- Gebala Barbara Dlo-Centre for Plant Breeding and Reproduction Research (CPRO-DLO), P.O. Box 16, 6700 AA, Wageningen, The Netherlands aut NATIONALLICENCE 700 1- van Dijken Folchert Dlo-Centre for Plant Breeding and Reproduction Research (CPRO-DLO), P.O. Box 16, 6700 AA, Wageningen, The Netherlands aut NATIONALLICENCE 700 1- Mollema Chris Dlo-Centre for Plant Breeding and Reproduction Research (CPRO-DLO), P.O. Box 16, 6700 AA, Wageningen, The Netherlands aut NATIONALLICENCE 773 0- Euphytica Kluwer Academic Publishers 97/3(1997-11-01), 283-288 0014-2336 97:3<283 1997 97 10681 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer