caa a22 4500 469060301 CHVBK 20180323132855.0 cr unu---uuuuu 170328e19921201xx s 000 0 eng 10.1007/BF01193805 doi (NATIONALLICENCE)springer-10.1007/BF01193805 Does a vascular fungus of tomato induce a defence response or a change in host plant quality that also affects the oviposition of spider mites? [Elektronische Daten] [P. Jongebloed, D. Elgersma, M. Sabelis] It has been suggested that previous infection by a vascular fungus causes induced resistance against two-spotted spider mites. To test the generality of this phenomenon, a series of experiments was carried out using two lines of tomato, differing only in resistance againstFusarium. In addition, tests were done in order to see whether the defense response against the fungus also affects the phytophagous mite directly. Inoculation of tomato plants with a vascular fungus (Fusarium oxysporum f.sp.lycopersici race 1) prior to infestation with spider mites caused a decrease in the rate of oviposition of two-spotted spider mites (Tetranychus urticae) on aFusarium-susceptible line, but only when plants were moderately to severely wilted. Spider mite oviposition did not change significantly of a previously inoculatedFusarium-resistant line. AsFusarium causes vascular occlusion and wilting of the plants, drought stress was experimentally induced to determine its influence on the reduction of oviposition. Drought caused a significant reduction in spider mite oviposition. We conclude that the effect of previousFusarium-inoculation on spider mite oviposition is primarily due to the fungus affecting the quality of the host plant (including the effect it may have on the composition of defensive compounds), rather than due to the stimulation of the defense system of the plant. SinceFusarium seals off the xylem vessels, thereby causing wilting of susceptible plants, the reduction in mite oviposition may well be due to drought stress in the leaves, rather than due to the production of phytoalexins. Elsevier Science Publishers B. V, 1993 Jongebloed P. Department of Pure and Applied Ecology, University of Amsterdam, Amsterdam, Netherlands aut Elgersma D. Department of Molecular Cell Biology, University of Amsterdam, Amsterdam, Netherlands aut Sabelis M. Department of Pure and Applied Ecology, University of Amsterdam, Amsterdam, Netherlands aut Experimental & Applied Acarology Kluwer Academic Publishers 16/3(1992-12-01), 227-236 0168-8162 16:3<227 1992 16 10493 https://doi.org/10.1007/BF01193805 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01193805 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Jongebloed P. Department of Pure and Applied Ecology, University of Amsterdam, Amsterdam, Netherlands aut NATIONALLICENCE 700 1- Elgersma D. Department of Molecular Cell Biology, University of Amsterdam, Amsterdam, Netherlands aut NATIONALLICENCE 700 1- Sabelis M. Department of Pure and Applied Ecology, University of Amsterdam, Amsterdam, Netherlands aut NATIONALLICENCE 773 0- Experimental & Applied Acarology Kluwer Academic Publishers 16/3(1992-12-01), 227-236 0168-8162 16:3<227 1992 16 10493 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer