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Sao Jose, Brazil

Somavilla L.,Federal University of Pelotas | Gomes C.B.,Laboratorio Of Fitopatologia | Carbonari J.J.,Ministerio da Agricultura | Carneiro R.M.D.G.,Embrapa Recursos Geneticos e Biotecnologia
Tropical Plant Pathology | Year: 2011

Forty-four populations of Meloidogyne spp. obtained from a root-knot nematode survey on kiwi (Actinidia deliciosa) orchards and nurseries in Rio Grande do Sul State were characterized biochemically using esterase isoenzyme (Est). Meloiodgyne arenaria Est A2 (Rm: 1.20, 1.28) was the most frequent species detected in this survey, occurring in 66.65% of the samples. Meloiodgyne ethiopica, with the phenotype E3 (Rm: 0.92, 1.10, 1.30) was detected in 16.66% of the samples in association with other Meloidogyne species. Other species found were M. javanica Est J3 (Rm: 1.00, 1.21, 1.35), M. hapla Est H1 (Rm: 1.17), M. incognita I1 (Rm: 1.03) and I2 (Rm: 1.03, 1.10) identified in 29.9%, 16.66%, 3.33% and 9.79% of the samples, respectively. Only one atypical population presenting the phenotype L3 (Rm: 1.00, 1.10, 1.30) occurred in one orchard (3.33%) but its identification was not possible even through the examination of the perineal patterns of females.© by the Brazilian Phytopathological Society. Source

Botton M.,Embrapa Uva e Vinho | Teixeira I.,Comercial Agricola Gervasoni | Bavaresco A.,Ministerio da Agricultura | Pastori P.L.,Federal University of Vicosa
Revista Colombiana de Entomologia | Year: 2010

The Brazilian ground pearl (BGP), Eurhizococcus brasiliensis (Hemiptera: Margarodidae), is one of the most important grape pests in Brazil. Granular and water dispersible granule formulations, doses of application, times of treatment, and application technology of the soil insecticides imidacloprid and thiamethoxam were evaluated to control BGP in infested vineyards. Thiamethoxam and imidacloprid effectively reduced BGP by 90% in established vineyards. No difference in insect control was observed between the formulations of thiamethoxam. Multiple applications of thiamethoxam in November and January were more effective than a single treatment delivered in November. Doses higher than 0.2 g a.i./plant of imidacloprid and thiamethoxam reduced BGP infestations in 3-year-old vineyards. The granular formulation of thiamethoxam was more effective when applied around the root system than when delivered in six points around the trunk using a hand-operated granular spreader. Drench application of imidacloprid and thiamethoxam using a hand-operated hydraulic sprayer was effective for insecticide treatment, allowing regulation of the amounts of water and active ingredients applied per plant. Source

Brackmann A.,Federal University of Santa Maria | Ceretta M.,Ministerio da Agricultura | Pinto J.A.V.,Federal University of Santa Maria | Venturini T.L.,Federal University of Santa Maria | Dal Col Lucio A.,Federal University of Santa Maria
Ciencia Rural | Year: 2010

This research was carried out to evaluate the tolerance of 'Gala' apples to low temperatures in different periods during storage. The treatments were the temperature of 0°C (standard); -0.8°C and -1.6°C, during 4 months in cold storage and during 8 months in CA storage at 1,0kPa of O2 + 2,0kPa of CO2, and combinations of these temperatures with different times in the beginning or in the end of the storage period. Observing the results, the temperatures of 0°C e -0.8°C showed better quality than in -1.6°C after 4 months of cold storage. AC fruit quality was higher in 0°C when compared with -0.8°C and -1.6°C. The temperatures of -1.6°C for cold storage and of -0.8°C and -1.6°C for controlled atmosphere storage, when used in the beginning of storage period were more damaging to quality than in the end of storage, causing mainly internal breakdown, injury of peel and decay. Source

Hanisch A.L.,Estacao Experimental de Canoinhas | Bavaresco A.,Ministerio da Agricultura | Fonseca J.A.,Estacao Experimental de Canoinhas
Revista Brasileira de Plantas Medicinais | Year: 2014

In the end of the 1990s, the Rio Natal community, located in the city of São Bento do Sul, in the Brazilian State of Santa Catarina, started to be part of an Environmental Protection Area. Since then, many cultivation areas have been increasingly having their forest restored. In this scenario, the community proposed to cultivate medicinal plants that were adapted to shaded conditions. To attend this demand, we carried out a participatory research in the community between 2005 and 2008. Fourteen species of medicinal plants having market potential were evaluated, and were cultivated in shaded areas, in three family properties. The survival of the species, the incidence of illnesses and pests, the dry matter value and the height of the plants were evaluated. The species that presented persistence to be cultivated in shaded areas were: Curcuma longa L.; Arctium lappa L.; Pfaffia glomerata (Spreng) Pedersen.; Mikania glomerata Sprengel.; Alternanthera sp.; Pogostemon cablin (Blanco) Benth. e Maytenus ilicifolia Mart. Ex Reissek. Source

Filho J.C.R.,Ministerio da Agricultura | Lopes P.S.,Federal University of Vicosa | Verneque R.S.,Embrapa Gado de Leite | Torres R.A.,Federal University of Vicosa | And 2 more authors.
Revista Brasileira de Zootecnia | Year: 2010

The objective of the present study was to evaluate the genetic structure of Gyr cattle selected for milk production. Files of pedigree and production were composed of 27,610 animals. The ENDOG program was used for the calculation of individual inbreeding coefficient (F) and coefficient of average relatedness (AR), effective number of animals(N e), effective number of founders (f e) and ancestors (f a), and generation interval (GI). Individual inbreeding coefficients and average relatedness in the population were 2.82% and 2.10%, respectively. It was observed a reduction in the effective number of animals, especially after publication of the results of the first progeny test. The estimated effective number of founders was 146 and 75 for the ancestrals. Out of those, only 28 ancestors accounted for the origin of 50% of the population genes. The average generation interval was 8.41 years and it was longer for males than for females. For maintaining genetic variability in future generations, it should be invested mating strategies that reduce inbreeding and which do not use massively only some high breeding value sires. © 2010 Sociedade Brasileira de Zootecnia. Source

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