Comparative Evaluation of Hoe-weeding and Pendimethalin Spray Regimes on Weed Management in Cowpea (Vigna unguiculata (L) Walp.) in North Central Nigeria

2016 ◽  
Vol 10 (1) ◽  
pp. 1-6
Author(s):  
Ademiluyi Oluwafemi ◽  
Joseph Abiodun
Keyword(s):  
Vigna Unguiculata ◽  
Weed Management ◽  
Comparative Evaluation ◽  
North Central ◽  
Spray Regimes

scholarly journals OCORRÊNCIA DE PLANTAS DANINHAS NA CULTURA DO FEIJÃO-CAUPI SOB QUATRO MANEJOS NA AMAZÔNIA OCIDENTAL

Nativa ◽  
2020 ◽  
Vol 8 (3) ◽  
pp. 427-435
Author(s):  
Davair Lopes Teixeira Junior ◽  
José Maria Arcanjo Alves ◽  
José Anchieta Alves Albuquerque ◽  
Paulo Roberto Ribeiro Rocha ◽  
Thais Santiago Castro ◽  
...  
Keyword(s):  
Vigna Unguiculata ◽  
Weed Management ◽  
Control Strategies ◽  
Similarity Index ◽  
Natural Vegetation ◽  
Importance Value Index ◽  
Importance Value ◽  
No Till ◽  
Before And After ◽  
Herbicide Glyphosate

Sistemas de manejos das plantas daninhas, utilizando diferentes estratégias de controle, podem alterar a dinâmica populacional das plantas e favorecer o controle de algumas espécies. Objetivou-se com esse trabalho avaliar a ocorrência de plantas daninhas antes e após cultivo de feijão-caupi, em plantio direto, sob quatro formas de manejo da vegetação natural (sem roçada, com roçada, uso de fogo e dessecação com glyphosate) em área da savana Amazônica no estado de Roraima. As avaliações foram realizadas mediante a aplicação do método do quadrado inventário. As plantas daninhas situadas nas áreas amostradas foram cortadas rente ao solo, identificadas e quantificadas. Os parâmetros fitossociológicos analisados foram: frequência relativa, densidade relativa, abundância relativa, índice de valor de importância e índice de similaridade. As principais famílias identificadas foram Cyperaceae, Poaceae e Fabaceae. As formas de manejo da vegetação natural da savana de Roraima para o cultivo do feijão-caupi favoreceram a emergência de 10 espécies de um total de 29. O manejo com o herbicida glyphosate proporcionou o desenvolvimento das espécies Digitaria insularis e Hynchelitrum repens e o controle de 12 espécies, entre elas o Trachypogon plumosus, importante forrageira da região em estudo. O manejo da vegetação natural com o fogo favoreceu o surgimento da espécie Desmodium tortuosum. O manejo com glyphosate promoveu alterações na comunidade infestante de plantas daninhas, nesse foi observado os menores índices de similaridade entre os sistemas de manejo avaliados.Palavras-chave: fitossociologia; Vigna unguiculata; vegetação natural; manejo com fogo. OCCURRENCE OF WEEDS IN COWPEA CULTURE UNDER FOUR HANDLES IN THE WESTERN AMAZON ABSTRACT: Weed management systems, using different control strategies, can change the population dynamics of plants and favor the control of some species.The objective of this work was to evaluate the occurrence of weeds before and after cowpea cultivation under no-tillage under four forms of natural vegetation management (no-till, no-till, use of fire and glyphosate desiccation) in an area of savannah of Roraima. Evaluations were performed by applying the inventory square method. Weeds located in the sampled areas were sectioned close to the ground, identified and quantified. The phytosociological parameters analyzed were: relative frequency, relative density, relative abundance, importance value index and similarity index. The main families identified were Cyperaceae, Poaceae and Fabaceae. The management of the natural vegetation of the Roraima savanna for cowpea cultivation favored the emergence of 10 species out of 29. Management with the herbicide glyphosate provided the appearance of the species Digitaria insularis and Hynchelitrum repens and the control of 12 species, including the Trachypogon plumosus, an important savanna forage. The management of natural vegetation with fire favored the emergence of the species Desmodium tortuosum. Glyphosate management caused changes in the weed community, which showed the lowest similarity indexes between the evaluated management systems.Keywords: phytosociology; Vigna unguiculata; natural vegetation; fire management.

Alternative Weed Management Systems for the Production of Kidney Beans (Phaseolus vulgaris)

1993 ◽  
Vol 7 (4) ◽  
pp. 940-945 ◽  
Author(s):  
Orvin C. Burnside ◽  
Norman H. Krause ◽  
Melvin J. Wiens ◽  
Michelle M. Johnson ◽  
Eric A. Ristau
Keyword(s):  
Weed Management ◽  
Research Center ◽  
Economic Returns ◽  
Dry Bean ◽  
North Central ◽  
Kidney Beans ◽  
Green Foxtail ◽  
Survey Results ◽  
Seed Yields ◽  
Irrigation Research

Weed management experiments with kidney beans were conducted at one irrigated site in 1991 and at two irrigated sites near Staples, MN during 1992. Green foxtail was the most difficult weed to control at the three research sites which agrees with survey results from dry bean growers regarding their worst weed problems. Hairy nightshade increased rapidly when weed management methods were reduced. Dry bean seed yields were highest in cultivated check plots on the farmer's field and in conventional practices plots at the Irrigation Research Center. Net economic returns, averaged over 1991 and 1992, for producing kidney beans at the Irrigation Research Center were $899/ha using conventional practices, $791/ha with cover crop practices, $734/ha with cultivated checks, $690/ha with herbicides only, and $208/ha on weedy checks. Kidney beans are an economical crop for North Central growers, but adequate weed management technologies are necessary for profitable production.

scholarly journals Performance of cowpea (Vigna unguiculata (L.) Walp) under irrigation as influenced by weed management methods and intra row spacing

2017 ◽  
Vol 2 (4) ◽  
pp. 58-65
Author(s):  
M. S. Na-Allah ◽  
◽  
A. A. Mukhtar ◽  
M. A. Mahadi ◽  
M. U. Tanimu ◽  
...  
Keyword(s):  
Vigna Unguiculata ◽  
Weed Management ◽  
Row Spacing

Weed Community Emergence Time Affects Accuracy of Predicted Corn Yield Loss by WeedSOFT

2009 ◽  
Vol 23 (3) ◽  
pp. 477-485 ◽  
Author(s):  
Mark R. Jeschke ◽  
David E. Stoltenberg ◽  
George O. Kegode ◽  
J. Anita Dille ◽  
Gregg A. Johnson
Keyword(s):  
Weed Management ◽  
Yield Loss ◽  
The United States ◽  
Pooled Analysis ◽  
Corn Yield ◽  
Yield Data ◽  
North Central ◽  
The North ◽  
Weed Communities ◽  
Broadleaf Species

WeedSOFT is a state-of-the-art decision support system for weed management in the north central region of the United States, but its accuracy to predict corn yield loss associated with later-emerging weed communities has not been adequately assessed. We conducted experiments in 2004 and 2005 to compare observed and predicted corn yield related to four establishment times of mixed-species weed communities for validation of competitive index modifier (CIM) values in WeedSOFT. Weed communities were established at VE, V2, V4, and V6 corn (emergence, second-leaf, fourth-leaf, and sixth-leaf stages, respectively), and consisted largely of annual grass and moderately competitive annual broadleaf species. Compared to weed-free corn, yield loss occurred in each of seven site-years for weed communities established at VE corn, but in only one site-year for communities established at V2 corn. No corn yield loss was associated with weed communities established at V4 or V6 corn. For communities established at VE corn, predicted corn yield differed from observed yield in all but one site year, with predicted yield less than observed yield in three site-years, and greater than observed yield in two site-years; however, nonlinear regression analyses of yield data pooled over site-years showed that fitted values were similar between predicted and observed yield. For communities established at V2 and V4 corn, predicted yield was less than observed yield in six and five site-years, respectively. For communities established at V6 corn, predicted yield was less than observed yield in three of six site-years, but was similar to observed yield in three of six site-years. These results indicated that the CIM values in WeedSOFT tended to overestimate the competitiveness of late-emerging weed communities. Corn yield data from a pooled analysis of all site-years were used to generate a revised set of growth stage CIM values, which improved the accuracy of predicted corn yield. These results should improve weed management decisions and reduce the need for herbicide applications to late-emerging weeds.

scholarly journals Effects of cowpea (Vigna unguiculata L. Walp.) as a Live mulch on weed management in maize cropping

2021 ◽  
Vol 38 (1) ◽  
pp. 61-67
Author(s):  
A.I. Woghiren ◽  
R. O., Awodoyin ◽  
C.I. Antiabong ◽  
E.N. Ngonadi ◽  
O.R. Jeminiwa ◽  
...  
Keyword(s):  
Weed Control ◽  
Vigna Unguiculata ◽  
Weed Management ◽  
Cropping Systems ◽  
Block Design ◽  
Crop Protection ◽  
Dry Weight ◽  
Weed Species ◽  
Environmental Biology ◽  
Maize Cultivation

Weed interference is a major constraint in maize cultivation. Living mulch as an alternative weed control strategy has been established to be environmentally safe but has not been widely used in maize cultivation. The aim of this research was to evaluate the weed management attributes of Vigna unguiculata in maize cropping. A field study was carried out in the crop garden of the Department of Crop Protection and Environmental Biology, University of Ibadan, Nigeria. The treatments were maize interplanted with Cowpea at 20,000 (M1), 30,000 (M2), 40,000 (M3) plants/hectare, hoe weeding (M4), weedy check (M5) and Primextra-2.5 L/ha (M6). The treatments were arranged in randomized complete block design, each replicated four times. Weed Dry Weight (WDW) and Weed Control Efficiency–WCE (%) were calculated following standardized methods. Data were analysed using descriptive statistics and ANOVA at α0.05. The treatment plots were dominated by weed species in the Asteraceae, Fabaceae and Poaceae families. The M5 accounted for the highest WDW (126.30 g). The WCE was highest in M3 (94.8%) and least in M5 (66.4%). Maize and cowpea interplant at 40,000 plants/hectare suppressed weed. Hence, cowpea is an ideal weed suppressant and can be inter-planted as a cover crop in maize cropping systems.

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