Comportamento de cultivares de soja quanto a qualidade fisiológica de sementes

This work was carried out in order to evaluate if there was a relationship between genotypes and the physiological soybean (Glycine max L.) seed quality. It was conducted during three years using seven cultivars each year. The seeds were harvested at: 1) yellow radicle or expanded pod stage, 2) yellow pod or physiological maturity (R7), 3) harvest maturity (R8), and 4) R8 + 21 days delay. Seed moisture content, standard germination, and vigor tests were performed. The germination and vigor evaluated by accelerated aging and electrical conductivity did not show physiological seed quality differences among genotypes as harvested at physiological maturity. Then, the evaluation of seed germination and vigor, when the environment is not a considered factor, is not an efficient method to show differences among soybean genotypes in terms of seed quality.

Virulência de isolados Dexanthomonas campestris pv. Phaseoli (Smith) dye em feijoeiro

The objective of this research was to evaluate de reaction of leaves and pods of five cultivars of bean (Phaseolus vulgaris L.) plants to twenty strains of Xanthomonas campestris pv. phaseoli. The strains were inoculated onto leaves in a greenhouse, and onto pods in a growth chamber. The results obtained were analyzed and the strains classified into three groups: low, medium, and high virulence. Most of the strains showed high virulence on leaves of Carioca and Rio Negro cultivars, as opposed to only low to medium virulence on leaves of IAPAR 14, IAPAR 16, and G. N. Nebraska # 1 sel. 27 cultivars. There were, however, individual strains powerful enough to overcome the leaf resistance of IAPAR 14, IAPAR 16, and G. N. Nebraska # 1 sel. 27. With regard to pods, most strains showed high virulence on all bean cultivars, with exception of IAPAR 14 where virulence was at medium level. A correlation between leaf and pod symptoms was found to exist in Carioca, Rio Negro, and IAPAR 14 cultivars. No such correlation was observed in IAPAR 16 and G. N. Nebraska # 1 sel. 27. Comparing strains producing melanine in vitro with those not producing this pigment, no difference was observed with regard to virulence.

Fungigação no controle do mofo branco e produtividade do feijoeiro em condições de cerrado brasileiro

The aim of this research was to evaluate the white mold severity (Sclerotinia sclerotiorum (Lib.) of Bary), bean production components and yield (Phaseolus vulgaris L.), variety Perola, according to the application of procimidone fungicide (Sialex 500), through fungigation (center pivot) and automotive sprayer (Uniport). The study was carried under field production commercial conditions, in Primavera do Leste - MT - Brazil. The experiment consisted of 5 treatments (with 4 repetitions of 4 ha each), all with two procimidone applications (1.2 kg ha-1 each application, same as, 0.6 kg a.i. per hectare) to the 42 and 52 days after seeding. The water depths of 5.5 and 11.0 mm were tested in the application through central pivot (this had your checked uniformity), providing volumes of 55.000 and 110.000 L ha-1, respectively, and the volumes of 120 and 200 L ha-1 in the automotive sprayer. The severity of disease was evaluated by the percentage of the area affected by plant damage using diagramatic grade scale of white mold severity, as described by Azevedo (1998). The values were used to calculate the area under the disease progress curve (AUDPC). They were also analyzed, the number of the fungus apothecia during the crop cycle and the residual sclerotias weight in harvest. On this occasion, it was also evaluated the crop yield parameters: number of plants per plot (final stand), pods per plant, grains per pod, medium weight of 200 grains and productivity of grains. The AUDPC values, apothecia to 42, 49 and 56 days after seeding, sclerotias in 2 soil kg and the crop productivity parameters were submitted to the variance analysis and Tukey Test at 0.05 of probability. This test was also applied in the comparison among the different fungicide application methods, independent of spray volumes in each one. The statistical processing was accomplished by STAT program. The results showed that weren't differences among application techniques studied in relation to productivity parameters, however, best white mold control, smaller apothecia number to 49 and 56 days after seeding and smaller weight of residual sclerotias in the harvest were obtained with the fungigation, independently of the spray volume used.

Desempenho de cultivares transgênicas de soja em sucessão a culturas de inverno em semeadura direta

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Vigor de sementes, população de plantas e desempenho agrônomico de soja

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Épocas de semeadura e manejos de corte de milheto cultivado no outono-inverno e efeitos na cultura da soja em sucessão sob plantio direto

Pós-graduação em Agronomia (Agricultura) - FCA

Alterações dos atributos químicos do solo e resposta da soja à cobertura vegetal e à calagem superficial na implantação do sistema de semeadura direta

Pós-graduação em Agronomia (Agricultura) - FCA

Aspectos higiênicos-sanitários de vegetais minimamente processados e perfil de resistência das leveduras isoladas frente ao hipoclorito de sódio e ozônio

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Desempenho agronômico de cultivares de soja (Glycine max (L.) Merril) em sistemas de preparo do solo

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Aperfeiçoamento do processo de fermentação láctica em diferentes hortaliças e avaliação de aspectos econômicos e energéticos

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Calagem na superfície para a cultura da soja, em semeadura direta sobre Brachiaria brizantha

Pós-graduação em Agronomia (Energia na Agricultura) - FCA

Abordagem multivariada na seleção de progênies de soja superiores e portadoras do gene RR

Pós-graduação em Agronomia (Genética e Melhoramento de Plantas) - FCAV

Critérios de manejo na irrigação do feijoeiro em três texturas de solo

Pós-graduação em Agronomia (Irrigação e Drenagem) - FCA

Redução na dosagem da mistura (fluazifop-p-butil+fomesafen) em dois cultivares de soja e em três épocas de semeadura

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Desempenho de genótipos de soja-hortaliças quanto às principais características agronômicas, funcionais e antinutricionais

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)