Weed Community Interference and Phytosociological Studies in a Sweet Sorghum Crop

Giancotti, Paulo Roberto Fidelis; Nepomuceno, Mariluce Pascoína; Martins, P.F.R.B.; Barroso, Arthur Arrobas Martins; Alves, Paulo Roberto Arruda

doi:10.1590/s0100-83582017350100051

Cited by 6 publications

(9 citation statements)

References 10 publications

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“…In a study carried out under field conditions, the hybrid of sweet sorghum CVSW 80007 did not have its yield reduced by a weed community (mainly composed by C. rotundus and Alternanthera tenella Colla), even in a crop grown without any weed control (Giancotti et al, 2017). In the present study, that hybrid of sweet sorghum also showed high weed tolerance, even in a situation 7 of population disadvantage.…”

contrasting

confidence: 49%

“…as the weeds with a prevailing influence given their high infestation rate, fast grow, and capacity for shading. While many studies have investigated the growth and development of grain and forage sorghum in the presence of weeds, few have addressed interspecific competition between weeds and sweet sorghum (Giancotti et al, 2017). Given sweet sorghum's high natural resources use efficiency and robust growth of both above-and below-group portions of the plant, it can be expected that even in a physically limited environment and under high weed infestation rates, this type of sorghum would not suffer weed interference as severe as other types of sorghum.…”

Section: Introductionmentioning

confidence: 99%

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Interspecific Competition Between Sweet Sorghum and Weeds

et al. 2019

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While evidence is mounting that sweet sorghum [Sorghum bicolor (L.) Moench], an ethanol crop, may provide an alternative to sugarcane (Saccharum officinarum L.) on sugarcane lands under rehabilitation, little is known of its under production limiting factors (e.g., interspecific competition with weeds). Accordingly, the aim of the present study was to identify the initial mutual interspecific competition between sweet sorghum hybrids and weeds in high infestation situations. The experiment was carried out in pots, using a 5 × 6 factorial design: (i) a sorghum-free control and four sweet sorghum hybrids (CVSW 81198, CVSW 80007, CVSW 80147 and XBSW 82158), besides a control without sweet-sorghum, and (ii) five species of weeds [Cyperus rotundus L., Mucuna aterrima (Piper and Tracy) Holland, Brachiaria decumbens Stapf, Ipomoea hederifolia L. and Digitaria nuda Schumach.], besides a weed-free control. M. aterrima was the only weed whose dry mass was not reduced by the presence of sweet sorghum. The hybrids of sweet sorghum did not suffer developmental interference from C. rotundus, I. hederifolia or D. nuda. On the other hand, these weeds dry mass was reduced through competition with sweet sorghum. The sweet sorghum cohabiting with B. decumbens or M. aterrima has its aboveground and leaf dry mass reduced. Sweet sorghum is a high competitive and robust plant and, even when under a high weed density, suffers little interspecific interference from certain species of the weed community.

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confidence: 49%

Section: Introductionmentioning

confidence: 99%

Interspecific Competition Between Sweet Sorghum and Weeds

et al. 2019

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“…The most important species were Digitaria ciliaris and Digitaria horizontalis, which made their infestation potential evident. The genus Digitaria has competitive weed species that are aggressive and difficult to manage, infesting many agricultural crops such as cowpea, sweet sorghum, cotton, banana and sugarcane (Oliveira & Freitas, 2008;Giancotti et al, 2017). They are perennial, erect grasses, which have striated stems and long internodes that ensures their dominance in the area.…”

Section: /9mentioning

confidence: 99%

Phytosociology and cover analysis in the suppression of weeds from an Amazonian agrosystem

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Pinheiro

et al. 2020

Agraria

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Weeds can occur in cultivated areas, competing with crops and causing considerable losses. Herbicides are the basis of weed control; however, they are questionable due to their possible negative impacts on human health and the environment. An alternative for controlling weeds is using cover plants. This study aimed to determine the floristic composition of weeds in an Amazonian agrosystem with cover plants and to evaluate the production of biomass, the soil cover rate and the weed suppression potential of cover plants. The experimental design was in randomized blocks, in a 4 x 2 factorial scheme. The factors under study were the cover species (Brachiaria ruziziensis, Canavalia ensiformis, Mucuna deeringiana) and the control group that consisted of weeds, evaluated during two agricultural years (2017 and 2018), with four replicates. Digitaria horizontalis was the most important weed species and was completely suppressed by B. ruziziensis. This cover type had a large production of biomass, greater coverage of the soil and high suppression of weeds in the Amazonian agrosystem.

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“…The observations of Mishra et al [99] regarding the increased competitiveness of taller hybrids were similar. There is also evidence that S. bicolor cultivars have excellent allelopathic potential, since they were reported to have suppressed noxious weeds such as Cyperus rotundus (L.) and Ipomoea hederifolia L. [100]. Recent research has established that allelopathic genotype cultivars provide suppression to noxious weed species such as S. halepense, Echinochloa colona L. (Link), and Amaranthus retroflexus L.; weed suppression was attributed to the presence of phenolic acids on the root exudates of the crop plants [94].…”

Section: Weed Managementmentioning

confidence: 99%

Weed Management Practices to Improve Establishment of Selected Lignocellulosic Crops

et al. 2021

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Lignocellulosic biomass is one of the dominant renewable energy resources suited for the production of sustainable biofuels and other energy purposes. This study was focused on weed management strategies that can improve the establishment of six lignocellulosic crops. The studied crops included: giant miscanthus, switchgrass, giant reed, cardoon, sweet sorghum, and kenaf. Delayed planting, increased planting densities, and mulching techniques can suppress weeds in giant miscanthus. Weed competition is detrimental for switchgrass establishment. Seedbed preparation and cultivar selection can determine its ability to compete with weeds. Giant reed is unlikely to get outcompeted by weeds, and any weed control operation is required only for the first growing season. Competitive cultivars and increased seeding rates maximize the competitiveness of cardoon against weeds. Several cultural practices can be used for non-chemical weed management in sweet sorghum and kenaf. For all crops, pre-emergence herbicides can be applied. The available safe post-emergence herbicides are limited. Mechanical weed control during crucial growth stages can provide solutions for sweet sorghum, kenaf, and perennial grasses. Further research is required to develop effective weed management strategies, with emphasis on cultural practices, that can improve the establishment of these prominent lignocellulosic crops.

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Weed Community Interference and Phytosociological Studies in a Sweet Sorghum Crop

Cited by 6 publications

References 10 publications

Interspecific Competition Between Sweet Sorghum and Weeds

Interspecific Competition Between Sweet Sorghum and Weeds

Phytosociology and cover analysis in the suppression of weeds from an Amazonian agrosystem

Weed Management Practices to Improve Establishment of Selected Lignocellulosic Crops

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