Interferência de Raphanus sativus na produtividade de cultivares de soja

Bianchi, Mário Antônio; Fleck, Nilson Gilberto; Agostinetto, Dirceu; Rizzardi, Mauro Antônio

doi:10.1590/s0100-83582011000400008

Cited by 24 publications

(25 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Results in which R. sativus was more competitive than soybean have also been reported by Fleck et al (2006) and Bianchi et al (2011). Galon et al (2011) found that Lolium multiflorum has a higher competitive ability compared to Hordeum vulgare.…”

Section: Resultssupporting

confidence: 62%

COMPETITIVE ABILITY OF WHEAT IN ASSOCIATION WITH BIOTYPES OF Raphanus raphanistrum L. RESISTANT AND SUSCEPTIBLE TO ALS-INHIBITOR HERBICIDES

Costa

Rizzardi

2015

Ciênc. agrotec.

View full text Add to dashboard Cite

The occurrence of Raphanus raphanistrum ALS herbicide-resistant in wheat crops causes crop yield losses, which makes it necessary to understand the factors that influence the interference of this weed to develop safer management strategies. This study aimed to evaluate the competitive ability of wheat in coexistence with biotypes of R. raphanistrum that are resistant (R biotype) and susceptible (S biotypes) to ALS herbicides and to determine whether there are differences in the competitiveness of these biotypes. The experiments were conducted in a greenhouse using a completely randomized design with four replications. The treatments were placed in pots and arranged in replacement series for three experiments (1 -wheat with the R biotype; 2 -wheat with the S biotype; and 3 -the R biotype with the S biotype) at the following ratios: 100:0, 75:25, 50:50, 25:75, and 0:100. The competitiveness was analyzed through diagrams applied to replacement experiments and competitiveness indices, including the evaluation of the shoot dry matter of the plants (experiments 1, 2, and 3) and the leaf area (experiment 3). The R and S biotypes significantly decreased the shoot dry matter of the wheat cultivar and demonstrated superior competitive ability compared with the culture. The interspecific competition was more important for the wheat and for the S biotype. The competitiveness of the R biotype compared to the S biotype was similar, with synergism in the leaf area production, which indicates the predominant intraspecific competition exhibited by the R biotype. Index terms:Resistance; competition; replacement series. RESUMOA ocorrência de Raphanus raphanistrum resistente aos herbicidas ALS, em lavouras de trigo, ocasiona perdas de rendimento na cultura, sendo necessário conhecer os fatores que influenciam na interferência dessa planta daninha, para, assim, desenvolver estratégias de manejo com maior segurança. Objetivou-se avaliar a habilidade competitiva de trigo em convivência com biótipos de R. raphanistrum resistente (biótipo R) e suscetível (biótipo S) aos herbicidas ALS e se há diferenças de competitividade entre os biótipos. Os experimentos foram realizados em casa de vegetação, em delineamento inteiramente casualizado, com quatro repetições. Os tratamentos foram alojados em vasos e arranjados em série de substituição, em três experimentos: 1-trigo com biótipo R, 2-trigo com biótipo S e 3-biótipo R com biótipo S, nas proporções: 100:0, 75:25, 50:50, 25:75 e 0:100. A competitividade foi analisada por meio de diagramas aplicados a experimentos substitutivos e índices de competitividade, com avaliação da matéria seca da parte aérea das plantas (experimentos 1, 2 e 3) e área foliar (experimento 3). Os biótipos R e S diminuíram, significativamente, a matéria seca da parte aérea do cultivar de trigo e demonstraram habilidade competitiva superior à cultura. A competição interespecífica foi mais importante para o trigo e para o biótipo S. A competitividade do biótipo R em relação ao biótipo S foi semelhante, havendo sine...

show abstract

Section: Resultssupporting

confidence: 62%

COMPETITIVE ABILITY OF WHEAT IN ASSOCIATION WITH BIOTYPES OF Raphanus raphanistrum L. RESISTANT AND SUSCEPTIBLE TO ALS-INHIBITOR HERBICIDES

Costa

Rizzardi

2015

Ciênc. agrotec.

View full text Add to dashboard Cite

show abstract

“…polymorph germination as a result of maternal, genetic and environmental factors; and growth is rapid and plants produce a large number of viable seeds (Costea et al, 2004). In addition, R. sativus is among the weed species with high impact on soybean yields (Bianchi et al, 2011).…”

Section: Resultsmentioning

confidence: 99%

“…This abuse, moreover, resulted in the selection of weed species naturally more tolerant to glyphosate, namely Ipomoea spp., Richardia brasiliensis and Commelina benghalensis, among others. This fact has made researchers and companies retreat from the excessive reliability in GMO crops and has provided new possibilities to researches that regard integrated weeds management and integrated cropping systems (Cruz et al, 2009;Bianchi et al, 2011;Agromundo, 2012). Researchers also started to notice that it is important to know the key traits of weed plants intended to be eliminated from the system, in order to develop management techniques that are efficient to the controlling of such species.…”

Section: Introductionmentioning

confidence: 99%

Infestation of weed species in pre-planting of soybean in succession to winter crops

Concenço¹,

Silva²,

Tomazi³

et al. 2013

Planta daninha

View full text Add to dashboard Cite

-This study aimed to evaluate different crops and plant species planted after soybeans for one year, in terms of their potential to inhibit the occurrence of weed species. The following crops that were planted as second crop after soybeans were evaluated: (1) corn (Zea mays) planted at spacing of 90 cm between rows, intercropped with Brachiaria ruziziensis in the inter-rows; (2) sunflower (Helianthus annuus); (3) crambe (Crambe abyssinica); (4) radish (Raphanus sativus); (5) rapeseed (Brassica napus); and (6) winter fallow -no plantation after soybeans. Phytosociological characterization of weed species was carried out at the pre-planting of soybeans in the following cropping season. Estimations of relative abundance, relative frequence, relative dominance and Importance Value Index were made for each species present. Areas were also intra-characterized by the diversity coefficients of Simpson and modified Shannon-Weiner, and areas were compared using the Jaccard similarity coefficient for presence-only, by multivariate cluster analysis. In the short-term (a single cropping season), cultivation of winter crops do contribute for lower occurrence of weed species at the pre-planting of soybeans on the subsequent cropping season. The suppressive effects depend both on the species grown in the winter and in the amount of straw left on the soil by these winter crops. Radish was more efficient in inhibiting the occurrence of weed species and rapeseed showed composition of infestation similar to that observed at the area under fallow.Keywords: corn, sunflower, radish, crambe, rapeseed, phytosociology.RESUMO -Objetivou-se com este estudo avaliar distintas espécies vegetais cultivadas na segunda safra, quanto ao seu potencial de inibir a ocorrência de espécies daninhas. As seguintes culturas foram avaliadas na segunda safra após soja: (1) milho (Zea mays) com espaçamento entre linhas de 90 cm; (2) girassol (Helianthus annuus); (3) crambe (Crambe abyssinica); (4) nabo forrageiro (Raphanus sativus); (5) canola (Brassica napus); e (6) pousiosem plantio de inverno em sucessão à soja. A caracterização fitossociológica das espécies daninhas foi feita no pré-plantio da safra de soja subsequente. Estimativas de abundância, frequência e dominância relativas, bem como do valor de importância, foram obtidas para cada espécie em cada área. As áreas foram intracaracterizadas pelos coeficientes de diversidade de Simpson e de Shannon-Weiner modificado e comparadas pelo coeficiente binário de similaridade de Jaccard, por análise multivariada de agrupamento. No curto prazo (um ano de distintos cultivos), o uso de oleaginosas de inverno contribuiu para a menor infestação por plantas daninhas na soja em sucessão, e os efeitos supressivos dependem tanto da espécie cultivada no inverno quanto do volume de palhada residual deixada por essa cultura. O nabo forrageiro foi o mais eficiente em inibir a ocorrência de espécies daninhas, e a canola apresentou composição da infestação similar à observada na área de pousio.

show abstract

“…Although it is very important, radish is one of the main dicotyledon weeds when present in the winter and summer crops, resulting in significant losses in the final yield of the crops (Vargas & Roman, 2005;Bianchi et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Resistence of Radish Biotypes to Iodosulfuron and Alternative Control

et al. 2016

View full text Add to dashboard Cite

-The repetitive use of iodosulfuron for the control of weeds in winter cereals in the south of Brazil has favored the emergence of resistant Raphanus sativus biotypes. The objective of this study was to evaluate: the response of Raphanus sativus biotypes susceptible and resistant to different dosages of iodosulfuron; the control of biotypes with alternative registered herbicides for the control of the species in crops of wheat, corn and soybean; and the existence of cross-resistance of the biotypes. Thus, four experiments were done in a greenhouse, with a completely randomized design and four replicates. The experimental units were composed of vases with a volumetric capacity of 0.75 L filled with substrate, containing a plant each. For the dose-response curve, three biotypes (factor A) and nine doses of the iodosulfuron herbicide (factor B) were used. For the alternative control, the recommendation was herbicides in pre or postemergence of the crops, and the crossedresistance was evaluated by using herbicides that inhibit the ALS enzyme of different chemical groups. The analyzed variables were control and shoot dry matter. GR 50 of the susceptible biotype (B 1 ) was 0.11 g a.i. ha -1 , whereas GR 50 of resistant biotypes (B 4 and B 13 ) was 102.9 and 86.8 g a.i. ha -1 of the iodosulfuron herbicide, respectively. The resistant biotypes presented crossed resistance to herbicides that inhibit the ALS enzyme, where the control can be efficient with the use of herbicides with different action mechanisms. Keywords:Raphanus sativus, dose-response, acetolactate synthase, weed. RESUMO -O uso repetido do herbicida iodosulfurom para controle de plantas daninhas em cereais de inverno no Sul do Brasil favoreceu o surgimento de biótipos de Palavras-chave:Raphanus sativus, dose-resposta, acetolactato sintase, planta daninha.

show abstract

Interferência de Raphanus sativus na produtividade de cultivares de soja

Cited by 24 publications

References 28 publications

COMPETITIVE ABILITY OF WHEAT IN ASSOCIATION WITH BIOTYPES OF Raphanus raphanistrum L. RESISTANT AND SUSCEPTIBLE TO ALS-INHIBITOR HERBICIDES

COMPETITIVE ABILITY OF WHEAT IN ASSOCIATION WITH BIOTYPES OF Raphanus raphanistrum L. RESISTANT AND SUSCEPTIBLE TO ALS-INHIBITOR HERBICIDES

Infestation of weed species in pre-planting of soybean in succession to winter crops

Resistence of Radish Biotypes to Iodosulfuron and Alternative Control

Contact Info

Product

Resources

About