Spray deposition on weeds of common bean crops

A.C.P. Rodrigues-Costa, D. Martins, N.V. Costa, and M.R.R. Pereira. 2011. Spray deposition on weeds of common bean crops. Cien. Inv. Agr. 38(3): 357-365. Weed control failure in common bean (Phaseolus vulgaris L.) production may be related to inappropriate herbicide application techniques. The purpose of this study, therefore, was to evaluate the amount of spray solution deposition that occurred on the weeds, Bidens pilosa L. and Brachiaria plantaginea (Link) Hitch., both within and between rows of common beans. The research was arranged in a randomized block design with four replications. The following 6 spray nozzles were used: flat fan nozzles XR 110015 VS (150 L ha(-1)) and XR 11002 VS (200 L ha(-1)); cone nozzles TX VK 6 (150 L ha(-1)) and TX VK 8 (200 L ha(-1)); and twin flat fan nozzles TJ60 11002 VS (150 L ha(-1)) and TJ60 11002 VS (200 L ha-1). The results showed that the loss of the spray solution on the soil occurred mainly within the bean rows and with a high intensity when using a nozzle spraying 200 L ha(-1). At 30 days after sowing, the TX (150 L ha(-1)) nozzle was the only nozzle that promoted deposits of less than 210.0 mu L g(-1) of dry mass. The spray nozzles showed a good performance in the deposition of the spray solution on the weeds that occurred both within and between the rows. However, for both species there was great variation in individual deposits depending on their location in relationship to the plants.

Cultivo de bananas em diferentes áreas na ilha de Tenerife

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

Trichospilus Diatraeae Cherian & Margabandhu, 1942 (Hymenoptera: Eulophidae), un nuevo parasitoide de Hypsipyla Grandella (Zeller, 1848) (Lepidoptera: Pyralidae)

Primer reporte de Trichospilus diatraeae (Hymenoptera: Eulophidae) parasitando pupas de lagarta Hypsipyla grandella, principal plaga forestal en América Latina y el Caribe, abriendo nuevas perspectivas para la utilización de este parasitoide en programas de control biológico de lagartas de importancia forestal.

Genetic diversity in Egeria densa and E. najas in Jupia Reservoir, Brazil

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

Floristic composition of the tree stratum of a semideciduous mesophytic forest in the municipality of Botucatu, São Paulo state

The floristic composition was studied in an area of semideciduous mesophytic forest, with 120 ha, in the municipality of Botucatu, SP, Brazil. This forest lies on the ascent of the Cuesta of Botucatu. Due to the heterogeneity of the relief, for the sampling process, the forest was divided in three regions: the upper one (comprising the strip of forest on the plateau), middle on (the forestal area lied on the ascent properly said) and the lower one (the strip of forest on the plain). The tree sampling regions showed some differences among them and this must be connected to the differences in the soil.

Perspectivas de la agricultura y el desarrollo rural en las Américas: una mirada hacia América Latina y el Caribe, 2010

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Perspectivas de la agricultura y del desarrollo rural en las Américas: una mirada hacia América Latina y el Caribe, 2011-2012

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Panorama de la Agricultura de América Latina y el Caribe en las últimas décadas: indicadores de comportamiento en cuadros y gráficos = Survey of agriculture in Latin America and the Caribbean over recent decades: performance indicators in charts and tables

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El desarrollo de complejos forestales en América Latina

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Evolução das políticas de desenvolvimento sustentável no Estado do Amazonas 2006-2009: avanços em direção às recomendações realizadas por ocasião da análise ambiental e de sustentabilidade do Estado do Amazonas

Incluye bibliografía

Análisis de la cadena productiva de la celulosa y el papel a la luz de los objetivos de desarrollo sostenible: estudio del caso de Chile

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La regionalización de la producción maderera en Brasil

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La importancia de la tecnología de la información y la comunicación para las industrias de recursos naturales

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La política agrícola en Chile: lecciones de tres décadas

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Los instrumentos económicos en la gestión del agua: el caso de Costa Rica

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