Distribuição espacial de formigueiros de Acromyrmex crassispinus (Forel) (Hymenoptera: Formicidae) em plantios de Pinus taeda.
Distribuição espacial de formigueiros de Acromyrmex crassispinus (Forel) (Hymenoptera: Formicidae) em plantios de Pinus taeda.
Author(s): NICKELE, M. A.; OLIVEIRA, E. B. de; REIS FILHO, W.; IEDE, E. T.; RIBEIRO, R. D.
Summary: The spatial distribution of insects is essential to perform control strategies, to improve sample techniques and to estimate economic losses. We aimed to determine the spatial distribution of nests of Acromyrmex crassispinus (Forel) in Pinus taeda plantations. The experiments were carried out in P. taeda plantations with different ages (treatments: recently-planted, three and six-year old plants). The study took place in Rio Negrinho and in Três Barras, SC. Three plots of one hectare were delimited in each treatment, and plots were divided in 64 sample units. The analysis of the dispersion index [variance/mean relationship (I), index of Morisita (I?) and k exponent of negative binomial distribution] showed that the majority of the samplings presented random distribution. Among the three distributions of probabilities studied: Poisson, positive binomial and negative binomial, the Poisson distribution was the best model to fi t the spatial distribution of A. crassispinus nests in all samplings. The result was a random distribution in the plantings of different ages.
Publication year: 2010
Types of publication: Journal article
Unit: Embrapa Forestry
Keywords: Formiga, Pinus Taeda
Observation
Some of Embrapa's publications are published as ePub files. To read them, use or download one of the following free software options to your computer or mobile device. Android: Google Play Books; IOS: iBooks; Windows and Linux: Calibre.
Access other publications
Access the Agricultural Research Database (BDPA) to consult Embrapa's full library collection and records.
Visit Embrapa Bookstore to purchase books and other publications sold by Embrapa.