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Spatio-temporal modelling of coffee berry borer infestation patterns accounting for inflation of zeroes and missing values Scientia Agricola
Ruiz-Cárdenas,Ramiro; Assunção,Renato Martins; Demétrio,Clarice Garcia Borges.
The study of pest distributions in space and time in agricultural systems provides important information for the optimization of integrated pest management programs and for the planning of experiments. Two statistical problems commonly associated to the space-time modelling of data that hinder its implementation are the excess of zero counts and the presence of missing values due to the adopted sampling scheme. These problems are considered in the present article. Data of coffee berry borer infestation collected under Colombian field conditions are used to study the spatio-temporal evolution of the pest infestation. The dispersion of the pest starting from initial focuses of infestation was modelled considering linear and quadratic infestation growth...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Markov chain Monte Carlo methods; Risk maps; Mixture model; Zero inflated model; Multiple imputation.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000100014
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Life table of Hypothenemus hampei (Ferrari) in relation to coffee berry phenology under Colombian field conditions Scientia Agricola
Ruiz-Cárdenas,Ramiro; Baker,Peter.
The overlap of generations of coffee berry borer (CBB), Hypothenemus hampei (Ferrari) under field conditions in countries like Colombia hinders the construction of life tables by the sampling of natural populations. In this paper, a field methodology to carry out regular measurements of CBB cohorts inside coffee berries of different ages until harvest, both in coffee trees and in infested berries placed on the ground, is developed and used to compare the life history parameters of CBB. Populations with berries at six ages in three experimental stations (without CBB control) and in a commercial farm in Colombia (with chemical CBB control regularly carried out) were used. The duration of the pre-oviposition period as well as the mortality and survival rates...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Coffee berry borer; Population parameters; Integrated pest management.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162010000600007
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