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Spatial distribution of head smut (Sporisorium reilianum) of corn in Mexico Ciencia e Investigación Agraria
Sánchez-Pale,Jesús Ricardo; Ramírez-Dávila,José Francisco; González-Huerta,Andrés; de León,Carlos.
Knowledge about the spatial distribution of agricultural diseases is important for the elaboration of integrated pest management programs. Such knowledge allows the exact and adept development of sampling methods, control methods and risk valuation. Despite its importance, there have been few studies of the spatial distribution of head smut of corn in Mexico. This study aimed to determine the spatial distribution of this disease during the year 2007 in the State of México and to establish its spatial behavior with geostatistical techniques. Five points per plot were chosen for sampling. For each sampling point, 100 plants in a single row were counted, and the plants that presented symptoms of the disease were recorded. The geostatistical analysis used this...
Tipo: Journal article Palavras-chave: Geostatistic; Sphacelatheca reiliana; Sporisorium reilianum; Zea mays.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202011000200011
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Snap bean production using sunflowers as living trellises in the central high valleys of Mexico Ciencia e Investigación Agraria
Morales-Rosales,Edgar Jesús; Franco-Mora,Omar; González-Huerta,Andrés.
The aim of this study was to assess growth, net assimilation rate, biomass production and pod yield in two snap bean cultivars sown in monoculture and combined with two sunflower cultivars at three localities in the State of Mexico, Mexico. The six treatments were evaluated in a 2 x 3 factorial experiment in a randomized complete block design with four replications. When F values were significant, the least significant difference test at the 5% level of significance was used. The principal component analysis was also used to study the interrelationship among the six treatments and seven variables. The results observed in the biplot indicated that the largest original variation in the data was adequately represented in the first two principal components...
Tipo: Journal article Palavras-chave: Phaseoulus vulgaris; Helianthus annuus; Multiple crops; Net assimilation rate; Principal component analysis.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202011000100005
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