Weed Interference on Productivity of Bell Pepper Crops

Abstract

The objective of this work was to determine the interference periods of weeds of the bell pepper cultivar ‘Dahra’. Two experiments were conducted during the years 2014/15 (harvest with lower rainfall) and 2015/16 (harvest with higher rainfall). The treatments consisted of 11 growing periods of cohabitation and weed control with ‘Dahra’ bell peppers: 14, 28, 42, 56, 70, 84, 98, 112, 126, 140 and 154 days after transplanting (DAT). For the determination of the interference periods, the productivity data were analyze using the Boltzmann sigmoidal regression model. The main weeds were Eleusine indica, Brachiaria plantaginea, Digitaria nuda and Nicandra physaloides for presenting high biomass and relative density. The concomitance of these weeds caused losses of up to 85.22% (2014/15) and 86.2% (2015/16) in the fruit yield. It was found that, respectively, for the years 2014/15 and 2015/16, the period before the interference was 17 and 11 DAT, and the total interference prevention period of 71 and 89 DAT. Considering a tolerance of 5% in reducing bell pepper yield, it is recommended that weed control be performed from 11 to 89 DAT.

Does a high sowing density of common bean change the weed interference periods?

“…Agrar., Recife, v.17, n.4, e2886, 2022 8/10 space, light, and resources in general, especially in the initial periods of coexistence, which favored its establishment, thus becoming the main species competing with the bean plant. Authors such as Uljol et al (2018) and Amaral et al (2019) have also recorded high RI values of Nicandra physaloides at increasing coexistence periods in bell bell pepper and sugarcane, respectively, which highlights the great infesting capacity of the species in distinct agroecosystems.…”

“…In the TPM experiment, the greatest highlight in relation to the number of individuals was for Nicandra physaloides, a species that found the right environment to establish itself as a result of the greater space and light, accelerating its development, although it is a species with slower germination flow and longer cycle compared to other species, such as Eleusine indica and Digitaria nuda (Uljol et al, 2018).…”

“…Nicandra physaloides was most favored in the TPM treatments, where it produced greater dry mass compared to FPM, since in TPM there was more room for absorbing light, CO 2 , water, and nutrients, and thus forming abundant biomass. Uljol et al (2018) explained that Nicandra physaloides is very vigorous and of optimum cover production. Even at low density, it can accumulate large amounts of dry mass and stand out as the dominant species.…”

Levantamento fitossociológico de plantas daninhas em cultivo de couve-folha em consorciação com quiabeiro em sistema de produção orgânico

“…As espécies de plantas daninhas competem com a cultura de interesse por recursos essenciais ao desenvolvimento das plantas, como nutrientes, espaço e luminosidade. Na ausência de controle da comunidade infestante, o comprometimento do potencial produtivo de hortaliças como o quiabeiro atinge em cerca de 85% (Fukushi et al, 2011;Uljol et al, 2018).…”