@Article{phyton.2019.06350,
AUTHOR = {Roberto Rivera-Martínez, Agustín David Acosta-Guadarrama, José Francisco Ramírez-Dávila, Fidel Lara Vazquez, Dulce Karen Figueroa Figueroa},
TITLE = {Spatial Distribution of Nymphs Populations Bactericera cockerelli Sulc in Tomato Crops (<i>Physalis ixocarpa</i> Brot)},
JOURNAL = {Phyton-International Journal of Experimental Botany},
VOLUME = {88},
YEAR = {2019},
NUMBER = {4},
PAGES = {449--458},
URL = {http://www.techscience.com/phyton/v88n4/38063},
ISSN = {1851-5657},
ABSTRACT = {Tomato crops (<i>Physalis ixocarpa</i> Brot.) are produced in almost all
Mexico, part of the United States and Central America. Recently the tomato
production has suffered economic losses of 70% to 80% due the presence of
yellowing and floral abortion, whose causal agent has been attributed to the
presence of phytoplasma; an insect vector of these phytoplasma is <i>Bactericera
cockerrelli</i> Sulc. Alternative control of this psyllid has lacked effectiveness
because their spatial distribution is unknown within tomato plots. This study
aimed to determine the spatial distribution of populations of nymphs of <i>B.
cockerelli</i> in four tomato plots, the determination of the spatial distribution was
performed by means of geostatistics. The experimental semivariogram was
determined to adjust to a theoretical model (spherical, exponential or Gaussian)
through the program Variowin 2.2, the adjustment was validated with the method
of cross-validation and aggregation maps of the pest were obtained through
Kriging with Surfer 9.0 program. The short-term time-space stability of the pest
was determined through the tests Crámer-von Mises. The results showed that
populations of nymphs of <i>B. cockerelli</i> have a distribution of aggregate type,
which was corroborated by density maps. Infestations are not present in 100% of
the surface of the experimental plots, which helps to direct control measures on
specific areas of infestation.},
DOI = {10.32604/phyton.2019.06350}
}