Dinâmica populacional de plantas daninhas em cultivares de alface produzidas no verão em Seropédica - RJ

Brandão, Antônio de Amorim; Ribeiro, Eduardo Castro; Fiorini, Cibelle Vilela Andrade; Machado, Aroldo Ferreira Lopes; Lopes, Higino Marcos

doi:10.18406/2316-1817v8n12016782

Cited by 3 publications

(1 citation statement)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Conversely, Salad Bowl was the only cultivar that was able to interfere in the pigweed growth in the density of 4 plants m -2 , in order to make it equal to the dry matter produced in the plots with 16 plants m -2 (Table 3). Brandão et al (2016) evaluated the weed suppression potential of several lettuce cultivars in Seropédica city, Rio de Janeiro State. The authors emphasized that the different development behaviors of the cultivars led to weed suppression due, among other factors, to soil cover.…”

Section: Methodsmentioning

confidence: 99%

Redroot pigweed interference with lettuce crop

et al. 2020

View full text Add to dashboard Cite

HIGHLIGHTS  Density of 16 plants m-2 of redroot pigweed, in the planting lines, most negatively affected lettuce growth  Cultivar Lucy Brown showed greater tolerance to coexistence with redroot pigweed plants  The cultivar Lídia was the most sensitive to the interference imposed by redroot pigweed plants ABSTRACT Background: Lettuce-production areas in Brazil are frequently infested by pigweed plants, which can interfere with production by competing for resources or releasing allelopathic compounds in the environment. Objective: The present study evaluated the effect of redroot pigweed (Amaranthus retroflexus) density and distribution on lettuce crop (Lactuca sativa L.). Methods: The cultivars Lídia, Verônica, Lucy Brown and Salad Bowl were used. After transplanting, these plants coexisted until harvest with four pigweed plants (equivalent to 16 plants m-2) located within or outside planting rows, or with one pigweed plant located at the center of the plot (4 plants m-2), as well as a control without weed. The experiment was conducted in an open and semi-controlled area, with treatments arranged in a 4x4 factorial scheme, in a completely randomized experimental design with three replicates. Evaluations included: the number of leaves, fresh matter (lettuce only), height, leaf area and dry matter of lettuce and redroot pigweed plants. Results: The coexistence with redroot pigweed caused yield losses of up to 45% for cultivar Lídia; 41% for Salad Bowl; 33% for Verônica; and 28% for Lucy Brown. Conclusions: The density of 16 plants m-2 of redroot pigweed was the one that most negatively affected the growth of the cultivars, in which the positioning in the planting lines resulted in greater interference to the crop growth. Among the cultivars tested, Lucy Brown showed greater tolerance to coexistence with redroot pigweed plants, while the cultivar Lídia was the most sensitive to the imposed interference.

show abstract

Section: Methodsmentioning

confidence: 99%

Redroot pigweed interference with lettuce crop

et al. 2020

View full text Add to dashboard Cite

show abstract

Efeito de diferentes técnicas para controle de plantas daninhas na cultura do rabanete

Silva

Oliveira

Nóbrega

et al. 2020

RSD

View full text Add to dashboard Cite

Objetivou-se avaliar alternativas para o controle das plantas daninhas na cultura do rabanete pela mensuração de suas características agronômicas em condições semiáridas. O experimento foi realizado em delineamento experimental inteiramente casualizado, com oito tratamentos correspondentes as formas de controle de plantas daninhas, a saber: filme plástico com cor branca; filme plástico com cor preta; capim de burro, Cynodon dactylon; folhas de nim, Azadirachta indica A. Juss; capim de burro–incorporado ao solo; nim–incorporado ao solo; solarização e testemunha. As maiores ocorrências de plantas daninhas foram das espécies Capim navalha (Hypolytrum pungens), Azevém (Lolium perene), Bredo fino (Trianthema portulacastrum L.) e Amaranthus spp. Os tratamentos Capim-de-burro incorporado (CBI) e nim incorporado ao solo (NIS) foram os mais eficientes no controle de plantas daninhas e também proporcionaram maiores massas da parte aérea e raiz do rabanete.

show abstract

Effect of weed interference in the production components of ‘Lucy Brown’ american lettuce

et al. 2021

View full text Add to dashboard Cite

One of the main challenges faced bylettuce producers is the interference of weeds whichaffectscrop development and productivity.The aim of this study was to evaluate the occurrence of programmed weeding on the growth and production of Lucy Brown American lettuce.The experiment was carried out between March and May 2017 at the Federal University of Roraima Cauamé campus, in Boa Vista, Roraima, Brazil. The experimental design used was randomized blocks with six treatments, four replications and four lettuce plants per experimental unit. The treatments tested were as follows: 100% weed control (100% WC); weed control 5 days after transplanting (WC 5 DAT); weed control 10 days after transplanting (WC 10 DAT); weed control 15 days after transplanting (WC 15 DAT); weed control 20 days after transplanting (WC 20 DAT) and 100% without weed control (100% WWC). The following variables were evaluated: shootheight, stem height, stem diameter, number of leaves, leaf length, leaf width, root length, shoot freshweight, total fresh weight, shoot dry weightand productivity. The ‘Lucy Brown’lettuce crop must be weed-freeafter 5 days of transplanting the seedlings to avoid productivitylosses. The lack of weed control in the cultivation of ‘Lucy Brown’ lettuce causes a 71.88% decrease in its productivity.

show abstract

Dinâmica populacional de plantas daninhas em cultivares de alface produzidas no verão em Seropédica - RJ

Cited by 3 publications

References 8 publications

Redroot pigweed interference with lettuce crop

Redroot pigweed interference with lettuce crop

Efeito de diferentes técnicas para controle de plantas daninhas na cultura do rabanete

Effect of weed interference in the production components of ‘Lucy Brown’ american lettuce

Contact Info

Product

Resources

About