Abstract

GARCIA VALENCIA, Yeimy; MESA COBO, Nora Cristina; ESTRADA, Edgar Iván  and  MENA, Yuri. Study of the resistance to Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) in cultivated and wild germplasm of tomato (Solanum lycopersicum L.).. Acta Agron. [online]. 2013, vol.62, n.4, pp.361-369. ISSN 0120-2812.

Wild accessions and segregating populations of tomato resistant to Neoleucinodes elegantalis (Guenee) were evaluated in three cycles of cultivation to oviposition preference and number of nymphs of Bemisia tabaci (Gennadius), under field conditions and greenhouse. The experiments were carried out with a randomized complete block design with four replicates. The variables evaluated were: eggs number per leaf and number of nymphs per leaf. Each observation was composed by the mean obtained for three leaves let sof the upper, middle and lower stem. White fly populations were very low in the first two growing seasons due to high rain fall comparable. These conditions did not allow performing a susceptible or resistant material selection to the insect. In the third cultivation cycle under greenhouse conditions were no any significant differences between the back cross with respect to the control variable subject to the oviposition preference. The genotype 4212P4 performed the lowest number of nymphs showing that this genotype possibly has a mechanism that would give less attraction for B. tabaci. Three crop cycles were evaluated under field conditions and greenhouse, all of three evaluations, the genotypes less preferred for oviposition and number of nymphs were: PI 134417, PI 134418 and PI 126449 (Solanum habrochaites var. Glabratum S. Knapp y D. M Spooneer).

Keywords : Bemisia tabaci; resistance; Solanum; whitefly.

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