Fitossociologia De Plantas Daninhas Em Cultivo De Feijão-Caupi No Semiárido Mineiro

Lacerda, M. L.; Silva, Dhanne Lucas Soares; Aspiazú, Ignácio; Carvalho, Abner José de; Oliveira, Simônica Maria de; Silva, Rafael Fernandes

doi:10.31413/nativa.v9i5.11210

Cited by 5 publications

(5 citation statements)

References 8 publications

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“…These results assist in understanding the level of importance of weed populations present in cowpea crop and can be used to subsidize the development of integrated weed management programs (CONCENÇO et al, 2017). According to Lacerda et al (2021), the higher occurrence of dicotyledon weed species found may be connected to their class, which is the same of cowpea, presenting similarities that make them more difficult to control. In addition, species that have C4 photosynthetic metabolism, as those from the families Poaceae, Portulacaceae, and Amaranthaceae (Table 1), may have some competitive advantages when they occur in crops with C3 photosynthetic metabolism plants (SANTOS et al, 2017), such as cowpea.…”

Section: Resultsmentioning

confidence: 99%

Weed interference periods in cowpea crop

et al. 2023

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Cowpea is one of the pulse crops that present the highest potential for growing in the Semiarid region of Brazil. Lowcost vegetable protein source, it has resilience to adverse conditions, however, in competition with weeds, its productivity can be strongly compromised. To overcoming this situation, it is essential for integrated management programs to determine the critical period for preventing interference. Thus, the objective of this work was to determine weed interference periods and the effect of coexistence periods on cowpea grain yield in the Semiarid region of the state of Minas Gerais, Brazil. The treatments were arranged in a 2×9 factorial scheme, as follows: cultivation in coexistence with weeds and cultivation under weed control, for nine crescent periods (0-7, 0-14, 0-21, 0-28, 0-35, 0-42, 0-49, 0-56 and 0-63 days after crop emergence), in a randomized experimental block design with four replications. The weed community was studied through phytosociological survey and evaluation of dry matter production and cowpea was evaluated for dry matter production, 100-grain mass and grain yield. The interference periods were determined using a non-linear logistic regression model. The weed community found was composed of 70% dicotyledonous and 30% monocotyledon plants, distributed in seven families and ten species. The coexistence with weeds results in losses of up to 90% in cowpea grain yield. The critical period of weed control in cowpea crop in the Semiarid region of the state of Minas Gerais, Brazil, is 11 to 36 days after crop emergence.

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Section: Resultsmentioning

confidence: 99%

Weed interference periods in cowpea crop

et al. 2023

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“…Of these species, 57.1% were eudicotyledons and 42.9 monocotyledons (Table 1). According to Lacerda et al (2021), because they belong to the same class as the crop, eudicotyledonous weeds can have similarities that make their control challenging. It is therefore necessary to adopt specific integrated management strategies, such as crop rotation and the selection of selective herbicides, in order to minimize their impact on bean cultivation.…”

Section: Resultsmentioning

confidence: 99%

Weed phytosociology in the cultivation of black beans under seeding densities in semi-arid

Campos,

Silva,

Carvalho

et al. 2023

Agraria

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The objective of this study was to characterize the phytosociology of weeds in irrigated cultivation of black beans, under different sowing densities in semi-arid region of Minas Gerais, Brazil. The experiments were conducted in the autumn-winter harvest. The treatments consisted of four bean sowing densities (50, 100, 200, and 500 thousand seeds ha -1 ), in a randomized block design, with four repetitions. Weed plants with complete structure were collected using the standard method of the square inventory and phytosociological parameters were estimated, studied using descriptive analysis. Lower sowing densities favored the development of species with C4 metabolism, while higher density suppressed their diversity, especially promoting Sena obtusifolia. The sowing density of black beans alters the dynamics of weeds in semi-arid conditions in Minas Gerais, Brazil. The density of black beans at 500 thousand seeds ha -1 suppresses the diversity of weed species, especially those with C4 metabolism. The species S. obtusifolia, Eleusine indica, Amaranthus spp., and Brachiaria plantaginea have higher importance value indices (IVI) and coverage value indices (IVC) in different densities of black beans in the semi-arid region of Minas Gerais, Brazil.

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“…Plants with C4 metabolism adapt well to regions with a hot and dry climate, and to semi-arid regions, compared to plants with C3 metabolism. In this way, they are favored in the competition for nutrients, water and solar radiation, standing out in the cultivation area (LACERDA et al, 2021).…”

Section: Resultsmentioning

confidence: 99%

“…Cowpea cultivation is traditional in northern Minas Gerais and adapts to the semiarid climate of the region, which has an irregular precipitation distribution, high temperatures, and low air humidity (BATISTA et al, 2017). However, cowpea yield is low in northern Minas Gerais due to the applied technology level, use of low yielding cultivars, and lack of weed management strategies (GUERRA et al, 2017, LACERDA et al, 2021.…”

Section: Introductionmentioning

confidence: 99%

Weed interference in caupi beans (Vigna unguiculata) grown in Januária, north of Minas Gerais, Brazil

et al. 2022

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The degree of weed interference in an agricultural crop is influenced by edaphoclimatic characteristics, the management used in the environment and the period of coexistence between the weeds and the crop of interest. This study aimed to determine periods of weed interference in cowpea (Vigna unguiculata - Fabaceae) var. BRS Potengi in the semiarid of northern Minas Gerais, Brazil. Treatments consisted of periods of control and coexistence of cowpea with weeds under irrigated cultivation (0, 7, 14, 21, 28, 35, 42, 49, 56, 63, and 77 days after crop emergence). At the end of each period of coexistence and harvest time, weeds were quantified and identified, and dry matter was determined. Stem diameter, number of pods per plant, and grain yield were obtained for cowpea. The main weeds found were Cenchrus echinatus, Panicum maximum, Eleusine indica (Poaceae), and Amaranthus retroflexus (Amaranthaceae). The period before interference (PBI) occurred up to 9 days after emergence, the total period of interference prevention (TPIP) occurred up to 23 days after emergence, and critical period of interference prevention (CPIP) was observed between 9 and 23 days after emergence. Weed interference during the entire cowpea cycle reduced yield by 37% when compared to the control treatment.

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Fitossociologia De Plantas Daninhas Em Cultivo De Feijão-Caupi No Semiárido Mineiro

Cited by 5 publications

References 8 publications

Weed interference periods in cowpea crop

Weed interference periods in cowpea crop

Weed phytosociology in the cultivation of black beans under seeding densities in semi-arid

Weed interference in caupi beans (Vigna unguiculata) grown in Januária, north of Minas Gerais, Brazil

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