Author(s)

Omar Schmildt¹, Vinicius de Souza Oliveira¹, Dirceu Pratissoli², José Augusto Teixeira do Amaral², Marcio Paulo Czepak³, Adriel Lima Nascimento¹, Edilson Romais Schmildt³

¹Postgraduate Program in Tropical Agriculture, Federal University of Espírito Santo, São Mateus, ES, Brazil.
²Department of Agronomy, Federal University of Espírito Santo, Alegre, ES, Brazil.
³Departament of Agrarian and Biological Sciences, Federal University of Espírito Santo, São Mateus, ES, Brazil.

The reduction of foliar area can cause yield reduction in common bean crops. The objective of this work was to verify which is the effect of different defoliation levels realized in several development stages of common bean (Phaseolus vulgaris L. cv. Goytacazes) over yield, weight of 100 seeds and number of pods per plant. The experimental design was randomized blocks, in a split-plot arrangement with five replications. The plot corresponded to the five defoliation epochs (first trifoliate leaf, flowering, pods formation, pods filling, and dry pods). In each plot, the split plot was represented by the four defoliation levels (0%, 33%, 67% and 100%). It was observed a decrease of yield for all levels defoliation considering all development stages, except for dried pods. The highest decrease was detected for flowering and pods formation. Through the regression analysis got a greater reduction in yield with 100% defoliation made at 42 days after emergence. The evaluation parameter that showed better relation with yield was a number of pods per plant.

Common Bean, Defoliation, Grain Productivity, Mass of Seeds, Pods

Schmildt, O. , de Souza Oliveira, V. , Pratissoli, D. , do Amaral, J. , Czepak, M. , Nascimento, A. and Schmildt, E. (2019) Artificial Defoliation to Simulate Losses on Production of Bean (Phaseolus vulgaris L. cv. Goytacazes). Agricultural Sciences, 10, 1023-1031. doi: 10.4236/as.2019.108077.