Keywords
leaf spot
host-parasitic relationship
How to Cite
Abstract
Kidney beans are a staple food due to their high protein, fiber, and mineral content. Colombia has 76,276 ha of crop and produced 104,919 t in 2024. In this study, we aimed to determine the effect of Aphelenchoides pseudobesseyi on the growth and production of kidney beans. Under semicontrolled conditions at the Montelindo Farm in Palestina, Caldas, two experiments were conducted in asbestos beds, where part of the kidney bean seedlings of the Citará and Quimbaya varieties were inoculated with 200 A. pseudobesseyi and other left uninoculated (control). The difference between the data obtained was evaluated using a t-test, with p<0.05. In both experiments, 8 and 18 days after the inoculation of A. pseudobesseyi in the bean seedlings, the nematodes caused light yellow lesions on 100% of the first pair of unifoliate leaves and angular necrotic lesions, respectively.At 20 days, in the Citará variety, 218 (Rf: 1.09) and 527 (Rf: 2.63) A. pseudobesseyi/plant were found in experiments I and II, respectively. In the Quimbaya variety, 234 (Rf: 1.17) and 290 (Rf:1.45) A. pseudobesseyi/plant were recorded in experiments I and II, respectively. The Citará variety infected with A. pseudobesseyi showed a significant reduction (p<0.05) in aerial dry weight and seed weight by 52.7% and 26.7%, respectively, in experiment I. In the Quimbaya variety infected with the nematode, there was a significant reduction (p<0.05) in seed dry weight by 34.6% in experiment I and in aerial dry weight by 26.2% in experiment II. This is the first report in Colombia of A. pseudobesseyi as a causative agent of leaf spots in kidney beans and reduced production.
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