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On-line version ISSN 1806-9991
MARUYAMA, Wilson Itamar; TOSCANO, Luciana Cláudia; BOICA JUNIOR, Arlindo L. and BARBOSA, José Carlos. Resistance of tomato genotypes to spider mite. Hortic. Bras. [online]. 2002, vol.20, n.3, pp. 480-484. ISSN 1806-9991. http://dx.doi.org/10.1590/S0102-05362002000300017.
The resistance of different tomato genotypes to spider mite (Tetranychus urticae) was evaluated. The wild genotypes evaluated were Lycopersicon pennellii (LA 716), L. hirsutum f. glabratum (PI 126449, PI 134417), L. hirsutum (PI 127826, PI 127827), L. peruvianum (CGO 6707), L. peruvianum f. dentatum (WYR 2020, LA 111), L. peruvianum f. glandulosum (LA 1113-1, LA 1113-2); and the commercial genotypes (L. esculentum) were Gem Pride, Santa Clara, and the F1 hybrids Bruna VFN, Carmem, Fortaleza and Débora Plus VFN. The number of eggs was counted, young phases (larvae, protonimphs, deutonimphs) and adults per leafleft. After the counting, the index of oviposition preference (IOP) also was calculated. The experiment was realized in randomized block design, with six replications. The LA 716, PI 126449, PI 134417, PI 127827, PI 127826 and Gem Pride genotypes showed non-preference for spider mite oviposition, being deterrents through IOP classification, while LA 111, WYR 2020, LA 1113-2 and LA1113-1 genotypes were the more preferred for oviposition and stimulants for oviposition by the IOP.
Keywords : Tetranychus urticae; Lycopersicon esculentum; L. pennellii; L. hirsutum; L. peruvianum; resistance of plant.