Morning glory species interference on the development and yield of soybeans

Abstract

Plants from the genus ipomoea are among the most important weeds in Brazil. The objective of this study was to determine the impact of different densities of 2 species of Ipomoea (I. grandifolia and I. purpurea) under different environments (counties of Pato Branco and Renascena, Paran state, Brazil) on soybean biometric variables, yield components and crop yield loss. Field experiments in 2 distinct places were conducted in a randomized block design, where 1 factor consisted of 8 plant densities (0, 2, 4, 6, 8, 10, 15 and 20 plantsm -2 ), whereas the other factor consisted of the 2 Ipomoea species.