Interference of Volunteer Corn on Soybean Grown under Cerrado Conditions

Braz, Lucas Braga Pereira; Braz, Guilherme Braga Pereira; Procópio, S.O.; Ferreira, Camila Jorge Bernabé; Silva, Alessandro Guerra da; Braz, A. J. B. P.

doi:10.1590/s0100-83582019370100099

Cited by 4 publications

(12 citation statements)

References 20 publications

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“…Soybean varieties did not vary during the first pod height insertion. This variable is significant because when very close to the ground, there may be an increase in pods not harvested by the cutting platform during mechanized soybean harvesting [31] and reduced operational efficiency. Therefore, early weed control is essential so that pods, whose insertion in the plant is closer to the ground, are harvested by the harvester's cutting platform.…”

Section: Resultsmentioning

confidence: 99%

Weed Competition on Soybean Varieties from Different Relative Maturity Groups

et al. 2023

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One factor limiting the achievement of high yields in the soybean crop is weed interference. The level of weed interference can vary according to the specificities of the weed community but also due to the agronomic characteristics of the soybean varieties. The objective of this work was to evaluate the effects of weed interference on soybean varieties of different relative maturity groups (RMG). A field experiment was implemented in a randomized complete block design, in a 3 × 4 factorial scheme, with five replications. The treatments were composed of the varieties BMX Flecha® (RMG 6.6), BMX Power® (RMG 7.3), and BMX Bônus® (RMG 7.9), associated with the following four weed managements: weeding throughout the cycle; weeded up to 20 days after emergence (DAE); weeded after 20 DAE until the end of soybean cycle; not weeded throughout the entire cycle. There was no interaction between the effects of the varieties and the weed management for emergence speed index, plant height, chlorophyll, first pod height insertion, plant population, thousand-grain weight and yield. The initial weed management caused changes in the composition of the weed community. The managements weeded throughout the cycle and weeded up until 20 DAE provided higher levels of chlorophyll and grain yield. The management without weeding during the entire cycle negatively influenced yield components. Late interventions in weed control, regardless of the soybean variety, result in yield losses.

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Section: Resultsmentioning

confidence: 99%

Weed Competition on Soybean Varieties from Different Relative Maturity Groups

et al. 2023

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“…Alms et al (2016) observed a 71% reduction in soybean yield due to the presence of six maize plants per m 2 in repeated experiments with two different crops. In another study conducted in the Cerrado environment, the presence of 15.2 maize plants per m 2 resulted in a 100% reduction in soybean yield (Braz et al, 2019).…”

Section: Voluntary Maize Interference On Soybean Cropmentioning

confidence: 93%

“…It is also noteworthy that soybean sowing density influences this variable, since a clear trend of Acta Scientiarum. Agronomy, v. 44, e54544, 2022 fewer pods per plant was noted in higher population sowing conditions (Braz et al, 2019). The number of pods per plant is one of the grain yield components that most correlates with soybean yield (Santos et al, 2014).…”

Section: Voluntary Maize Interference On Soybean Cropmentioning

confidence: 99%

“…Moreover, most competition assessments link only the density of voluntary maize plants to interference potential in soybean crops, and do not evaluate possible additional maize damage from maize plant positioning in relation to soybean crop rows. In addition to losses directly related to soybean yields, voluntary maize plants may also impair the yield of mechanized harvesting operations and decrease soybean quality (Braz et al, 2019). As most glyphosate-tolerant maize hybrids also feature Bt technology, aiming at tolerance toward defoliating lepidopterans, the presence of volunteer maize plants for much of the year can accelerate tolerance breaks, making the use of this important technology unviable for pest management (Marquardt, Terry, & Johnson, 2013).…”

Section: Introductionmentioning

confidence: 99%

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Pre-emergence control and interference of voluntary maize plants on a soybean crop in Brazilian Cerrado

et al. 2022

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The succession of soybean/maize has been largely adopted. Storm damage and crop problems can lead to grain loss, generating maize ear fragments or even whole ears that remain in the soil and still display germination viability, resulting in the occurrence of volunteer plants. In this context, the present study aimed to evaluate the interference of voluntary maize plants on soybean and investigate the susceptibility of maize hybrids to pre-emergence herbicides. In the first step, an experiment was performed evaluating the influence of voluntary maize plant density and spatial distribution on soybean. The experiment was performed in a randomized completely block design (RCBD) with four replications, with treatments disposed in factorial arrangement (2 x 4) + 1. The first factor corresponded to the spatial distribution of maize plants: row or in between soybean rows; while the second factor adopted four infestation densities of maize plants m-2: 4, 8, 12, and 16. The additional treatment consisted of a control without maize plants. For the second step, an experiment was conducted in two locations aiming to determine the efficacy of pre-emergence herbicides in the control of voluntary maize. Both experiments were installed in RCBD in a split-plot scheme with four replications. Fomesafen, lactofen, sulfentrazone, chlorimuron-ethyl, diclosulam, flumetsulam, imazethapyr, clomazone, metribuzin, [sulfentrazone + diuron], [imazethapyr + flumioxazin], and a control without herbicide application were evaluated in the main plot. In each subplot, the maize hybrids DKB310 PRO3™ and DKB390 PRO3™ were evaluated. No influence on the position of voluntary maize on the soybean yield was observed. The presence of the maize population led to a progressive decrease in soybean yield, ranging up to 86%, at 16 plants m-2. DKB390 displayed a stand reduction of 82.88% after the use of diclosulam. Diclosulam led to better results regarding maize plant decreases for both hybrids.

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“…However, with the emergence of technologies such as the use of Roundup Ready (RR) grains, the succession of crops results in a new problem for planting systems, such as weeds (Aguiar et al, 2017). For example, the presence of volunteer RR corn plants in coexistence with soybean has been increasing since the introduction of glyphosate-resistant corn varieties on the market (Braz et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Agronomic performance of soybeans with the presence of volunteer RR corn

et al. 2022

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The presence of volunteer corn plants among soybeans, both resistant to glyphosate, has increased in recent years in Brazil. The objective of this study was to quantify the impact on the agronomic performance in RR soybeans by the presence of volunteer RR corn in field conditions. The experiment was conducted in Tiradentes do Sul (RS), 2018/19 harvest. The experimental design used in the experiment was randomized blocks with four replications: control in the clean (only soybean) and eight densities of volunteer corn in soybean crop with 1, 2, 3, 4, 5, 6, 7 and 8 corn plants m -2 . In the physiological maturation of soybean, plant height, number of lateral branches, stem diameter, height of insertion of the first pod, number of pods plant -1 and grain yield were evaluated. All variables analyzed were negatively affected by the increase in the density of volunteer corn infestation, where the variables grain yield and number of pods plant -1 were the most affected, 63% and 81%, respectively. The presence of volunteer corn has a high capacity to reduce the yield of soybeans in the proportion of 500 kg ha -1 plant -1 of corn m -2 , and even at low densities, it needs control.

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Interference of Volunteer Corn on Soybean Grown under Cerrado Conditions

Cited by 4 publications

References 20 publications

Weed Competition on Soybean Varieties from Different Relative Maturity Groups

Weed Competition on Soybean Varieties from Different Relative Maturity Groups

Pre-emergence control and interference of voluntary maize plants on a soybean crop in Brazilian Cerrado

Agronomic performance of soybeans with the presence of volunteer RR corn

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