Dinâmica populacional e distribuição espacial de percevejos fitófagos em cultivos de soja [Glycine Max (L.) Merril]
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2014-02-25
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Universidade Federal de Goiás
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During 2011/2012 and 2012/2013, soybean fields were sampled in all stages. In this case objective of describing the population dynamics of the main species of phytophagous stink bugs and to determine the spatial distribution within field level to understand how is the stink bugs colonize soybean field. Five commercial fields submitted to different management practices were monitored. Sampling surveys to describe the spatial and probability distribution were conducted using regular sampling grids with equidistance of 50 m between sampling points. Fields were sampled weekly for stink bugs in all crop stages. The sampling method used was ground cloth, trough coutn nymphs and adults. The data were subjected to descriptive statistical analysis for better understanding of population dynamics. To verify the statistical distribution to the population of stinkbugs best adjusted of the null hypothesis test. Maps representing the localization of samples of stink bugs in soybean fields were constructed. Euschistus heros was the predominant species, representing 91% of all stink bugs sampled. The stink bug population fluctuation showed an early colonization of the soybean fields, which in the past was restricted to pod formation. Our results indicate that E. heros best fits the negative binomial and occurs randomly distributed in soybean fields what allows to conclude that sampling should be done in the hole field.
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GUIMARÃES, H. O. Dinâmica populacional e distribuição espacial de percevejos fitófagos em cultivos de soja [Glycine Max (L.) Merril]. 2014. 70 f. Dissertação (Mestrado em Agronomia) - Universidade Federal de Goiás, Goiânia, 2014.