Revista Colombiana de Entomología (2003) 29, 35-42

John Diaz Montaño, César Cardona and Juan M. Bueno (2003)
Caracterización de genotipos de fríjol (Phaseolus vulgaris) por su resistencia a Thrips palmi (Thysanoptera: Thripidae)
[Characterization of dry bean genotypes (Phaseolus vulgaris) for resistance to Thrips palmi (Thysanoptera: Thripidae)]
Revista Colombiana de Entomología 29 (1), 35-42
Abstract: To identify sources of resistance to Thrips palmi Karny in dry beans (Phaseolus vulgaris L.), three field trials were conducted in Pradera (Cauca Valley, Colombia) under heavy natural infestation. In the first trial, 38 genotypes were characterized for resistance to T. palmi in a completely randomized block design. In the other two trials, nine genotypes were used in a split-plot design. In one case, the main plot was fertilization level; while in the other, chemical protection was the main plot. Variation in T. palmi attack was detected in the genotypes tested. Thrip populations showed an aggregate pattern of distribution and had a significant effect on damage levels to plants. Damage negatively affected reproductive adaptation and yield plants. Genotypes Brunca, BH 21134-5, EMP 486, BAT 477, FEB 115 and BH 21134-60 showed resistance to thrips in the experiments. Fertilization levels did not have an effect on resistance expression. Losses due to thrips damage ranged from 11,9% to 65,1%. FEB 115, BH 21134-5, EMP 486, BH 21134-60 and Brunca were below the average susceptibility index of the experiment; genotypes with low susceptibility indexes may have tolerance to damage and suffer lower losses. Further work is needed in order to elucidate the mechanisms of resistance to thrips in resistant genotypes.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Spanish)
Database assignments for author(s): Cesar Cardona

Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host

---

Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Thrips palmi	Beans (Phaseolus)	Colombia