Desempenho de genótipos de algodoeiro na presença ou não de rotação de cultura com Crotalaria spectabilis, em área infestada com Meloidogyne incognita

Galbieri, Rafael; Fuzatto, Milton Geraldo; Cia, Edivaldo; Welter, Adinara Maria; Fanan, Sheila

doi:10.1590/s1982-56762011000500005

Cited by 5 publications

(4 citation statements)

References 5 publications

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“…Galbieri et al (2011) confirmed this assumptions studying the cultivar FM966LL in different locations, and finding susceptibility to RLS in Primavera do Leste MT and resistance in Ribeirão Preto SP. R. areola genotypic variation was also found by Pezenti et al (2013) studying fungi isolates from a cotton crop with three cultivars.…”

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confidence: 67%

Severity of Ramularia Leaf Spot and Seed Cotton Yield in Different Sowing Times

et al. 2016

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-The ramularia leaf spot (RLS) disease causes cotton yield losses. Choosing a less susceptible cultivar and a sowing time that are less favorable to the pathogen contribute to the management of this disease. The objective of this work was to evaluate the severity of ramularia leaf spot on cotton cultivars sowed in two different times. The experiment was conducted in a triple factorial design (4x3x2), consisted of four cultivars, the three thirds of the plant and two sowing times, with four replications. Each plot was divided in two twin plots, one with fungicide application (with disease control) and the other without fungicide application (without disease control). The severity assessments were performed every seven days, considering each third of the plant with a diagrammatic scale. Yield was evaluated in each plot. There was a significant interaction between sowing times and the thirds of the plant in the plots without disease control for RLS severity, with the highest values of area under the disease progress curve (AUDPC) in the first sowing time (ST1) and in the lower third of the plant. The FMT705 cultivar had the highest and FM951LL the lowest value of AUDPC. The AUDPC of these cultivars were no statistically different in the second sowing time (ST2), but they had higher AUDPC values in the lower third. Highest yields were found with ST1 in plots with disease control, with no differences between the cultivars, however, lower yields were found in plots without disease control.Keywords: Gossypium hirsutum L. Ramularia areola. Thirds of the plant. RELAÇÃO ENTRE SEVERIDADE DA MANCHA DE RAMULÁRIA E PRODUTIVIDADE DE ALGODOEIRO EM DUAS ÉPOCAS DE SEMEADURARESUMO -A mancha de ramulária promove perdas de produtividade do algodoeiro, em que a escolha da cultivar menos suscetível e a época de semeadura menos favorável ao patógeno contribuem para o manejo da doença. O objetivo deste estudo foi avaliar a severidade da mancha de ramulária em cultivares de algodão conduzido em duas épocas de semeadura. O experimento foi conduzido em esquema fatorial triplo (4x3x2), sendo quatro cultivares, três terços da planta e duas épocas de semeadura, com quatro repetições. Cada parcela foi dividida em duas parcelas gêmeas, onde uma parcela recebeu aplicação de fungicidas (com controle) e a outra parcela não recebeu aplicação de fungicidas (sem controle). As avaliações de severidade foram feitas a cada sete dias, considerando cada terço da planta com auxílio de uma escala diagramática. A produtividade foi avaliada na área útil de cada parcela gêmea. Houve interação significativa entre as épocas de semeadura e terços da planta nas parcelas sem controle, onde os maiores valores da área abaixo da curva de progresso da severidade (AACPS) da mancha de ramulária foram observados na primeira época de semeadura (ES1) e no terço inferior da planta. As cultivares FMT 705 e FM 951 LL apresentaram menor e maior valor de AACPS, respectivamente. Na segunda época de semeadura (ES2), as cultivares não diferiram estatisticamente para AACPS,...

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confidence: 67%

Severity of Ramularia Leaf Spot and Seed Cotton Yield in Different Sowing Times

et al. 2016

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“…Suinaga et al (2006) reported that the cultivars Delta Opal and BRS Cedro are the most common in the State of Mato Grosso, as they bring together high seed cotton productivity, fiber percentage, and phenotypic stability. However, other cultivars, such as Araça BRS, BRS Buriti, FMT 701, and NUOPAL are also widely cultivated as they have high yield potential (Galbieri et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

“…In most cases, these environments vary substantially, and there are interactions between genotypes and environments (GE), that arise from differential genotypic responses to the environment. Understanding GE interactions affords an assessment of the real impact of selection and ensures greater reliability when recommending genotypes to maximize productivity and other agronomic traits of interest in a specific location or group of environments (Cruz et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Biplot analysis of phenotypic stability in upland cotton genotypes in Mato Grosso

Farias¹,

Carvalho²,

Filho³

et al. 2016

Genet. Mol. Res.

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ABSTRACT. Seed cotton yield is a trait governed by multiple genes that cause changes in the performance of genotypes depending on the cultivation environment. Breeding programs examine the genotype x environment interaction (GE) using precise statistical methods, such as AMMI (additive main effects and multiplicative interaction) and GGE biplot (genotype main effects + genotype x environment interaction). The AMMI method combines the analysis of variance and principal components, to adjust the main effects (genotypes and environments) and the effects of GE interaction, respectively. The GGE biplot groups the genotype additive effect together with the multiplicative effect of the GE interaction, and submits both of these to the principal components analysis. The aim of this study was to investigate the association between the AMMI and GGE biplot methods and select cotton genotypes that simultaneously showed high productivity of seed cotton and stability in Mato Grosso environments. cotton productivity were analyzed by AMMI and GGE biplot methods. Both methods were concordant in the discrimination of environments and genotypes for phenotypic stability. The genotypes BRS ARAÇÁ and LD 05 CV had high seed cotton productivity and phenotypic stability, and could be grown in all environments across Mato Grosso State.

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“…Furthermore, they attract a great diversity of insects and natural enemies (Supriyadi, Wijayanti, Arniputri, Puspitarini, & Dwiyatno, 2019;Tavares et al, 2010). They are also able to control phytonematodes, benefiting antagonists and producing secondary compounds that are toxic or inhibitory to them, such as the monocrotaline pyrrolizidine alkaloids, which reduce the hatching of juveniles and motility (Galbieri, Fuzattoii, Ciaii, Welteri, & Fanan, 2011;Osei, Gowen, Pembroke, Brandenburg, & Jordan, 2010;Ratnadass, Fernandes, Avelino, & Habib, 2012;Santana et al, 2012). However, despite the literature demonstrating its nematicidal effect, the results presented here show that C. spectabilis maintained the highest and most stable number of viable EPNs on the 3rd day after inoculation, in relation to the other plants evaluated (Figure 2), with no effect on their infectivity (Figure 1).…”

Section: Resultsmentioning

confidence: 99%

Influence of plants used in agricultural diversification on the nematode Heterorhabditis amazonensis

Mertz¹,

Sales²,

Agudelo³

et al. 2021

Semina: Ciênc. Agrár.

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In an agricultural system, to increase natural biological control, plants that attract natural enemies can be grown alongside the main crop. However, the effects of these plants on entomopathogenic nematodes (EPNs), important agents for controlling soil pests, and the action of their conservation are unknown. To assess the impact of these plants on EPNs, two experiments were carried out in a greenhouse. The first measured the effect of Crotalaria spectabilis, Crotalaria breviflora, and Tagetes erecta on the persistence and infectivity of Heterorhabditis amazonensis isolate RSC 5 for 27 days, compared to a control treatment without plants. The second trial evaluated the effect of C. breviflora and T. erecta on the displacement of the nematode. Additionally, the influence of predator Calosoma granulatum in this system was evaluated. The plants did not influence nematode behaviour in terms of persistence, infectivity, or displacement. However, C. spectabilis allowed the most significant persistence of nematodes in the substrate for a short time, and T. erecta caused the fastest suppression of the initial population of infectives juvenile. In the second experiment, neither the predator nor the plants affected the nematode’s ability to move in the soil within 5 days. These results show that prior knowledge in agricultural diversification can help to control pests by inundative application of EPNs.

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Desempenho de genótipos de algodoeiro na presença ou não de rotação de cultura com Crotalaria spectabilis, em área infestada com Meloidogyne incognita

Cited by 5 publications

References 5 publications

Severity of Ramularia Leaf Spot and Seed Cotton Yield in Different Sowing Times

Severity of Ramularia Leaf Spot and Seed Cotton Yield in Different Sowing Times

Biplot analysis of phenotypic stability in upland cotton genotypes in Mato Grosso

Influence of plants used in agricultural diversification on the nematode Heterorhabditis amazonensis

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