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Acta Agronómica

Print version ISSN 0120-2812

Abstract

MENA PEREZ, Yuri Mercedes; MESA COBO, Nora Cristina; ESTRADA SALAZAR, Edgar Iván  and  GARCIA VALENCIA, Yeimy. Evaluation of resistance to Prodiplosis longifila Gagné (Diptera: Cecidomyiidae) in cultivated and wild tomato genotypes. Acta Agron. [online]. 2014, vol.63, n.2, pp.175-180. ISSN 0120-2812.  http://dx.doi.org/10.15446/acag.v63n2.30210.

Resistance was evaluated Prodiplosis longifila Gagné in three wild accessions Solanum habrochaites var. glabratum (PI134417, PI134418 and PI 126449) and advanced materials in breeding for resistance to fruit borer Neoleucinodes elegantalis: three genotypes of three backcross RC3 (3143P4, 3247P4, 36110P3) and four backcross genotype RC4 (4212P4) as susceptible check variety S. lycopersicum cv. Unapal-Maravilla. Evaluations were performed under field conditions and screen house, using a completely randomized design with four replications. Number of healthy/plant, number of shoots sprout damage was assessed with P. longifila, number of shoots with the presence of live and dead and number of living and dead larvae larvae per shoot. During the experiment field populations of P. longifila were 0.2 live larvae/shoot and 4.17 % damage, which prevented the establishment of differences between the genotypes studied. In screen house, insect populations were high, however wild accessions showed no damage, nor were preferred for oviposition, showing some degree of resistance. Unapal-Maravilla and genotypes corresponding to the RC3, were susceptible to insect. 4212P4 genotype showed the least damage of segregating populations with only 5.36% of shoots damaged, regarded as less preferred by the insect pest. Genotypes from backcrosses evaluated in these trials had previous selection toward resistance N. elegantalis, and in this process they may have been discarded genotypes with resistance to P. longifila.

Keywords : Prodiplosis longifila; prodiplosis; resistance; Solanum lycopersicum; Solanum habrochaites.

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