02878naa a2200361 a 450000100080000000500110000800800410001902400480006010000170010824501270012526000090025252017990026165000230206065000210208365000280210465000200213265000220215265000100217465000240218465000170220865000130222565300240223865300330226265300250229565300230232065300210234365300140236465300200237870000210239870000200241970000230243977300540246221661642024-08-01       1996    bl uuuu     u00u1 u    #d7 ahttps://doi.org/10.1006/bcon.1996.00962DOI1 aSUJII, E. R.  aApplication of multivariate analysis for the selection of candidates for biological control agents.h[electronic resource]  c1996  aA survey of natural enemies ofSenna obtusifolia(Leguminosae: Cesalpinaceae) was made in 46 localities in Brazil. Twenty-one preselected insect species were used in a multivariate analysis in a search for potential biocontrol agents, based on frequency of occurrence of each species, degree of insect/host association, and damage level. Insect communities were organized in a binary matrix (presence/absence of the species); measures of distance and similarities were based on the Jaccard coefficient, and cluster analysis was then conducted. Construction of a dendogram showed similarities among geographically close localities where phenological stages of sicklepod plants were similar. Analysis of correspondence based on the correlation matrix showed that Eigen values of the three first axes explain only 40.1% of the observed variation. Correlation among the scores produced by species Eigenvectors in each locality on axis 1 and the latitude, altitude, and phenological stage showed that only phenological stage was correlated (r = 0.45,P = 0.02). The results indicate that weather will not be a limiting factor for the establishment of these insect species in an environmental gradient similar to that of the surveyed area (12 to 22° latitude and 6 to 1200 m altitude). Distribution in the ordinal space of axes 1 and 2 showed thatAgrilus oceanicum(Buprestidae),Fundella argentina(Pyralidae),Thyphedanus undulatus(Hesperidae), andPhoebis sennae(Pieridae) are grouped and separated from the others in axis 2, suggesting that these species co-occur with each other. Based on their feeding guilds, multiple introduction of these species can be considered. Multivariate analysis showed potential to be used as an additional tool to help in the selection of candidates for biocontrol agents.  abiological control  acluster analysis  acorrespondence analysis  anatural enemies  aSenna obtusifolia  aweeds  aControle Biológico  aErva Daninha  aFedegoso  aAnálise de cluster  aAnálise de correspondência  aEstratégia de busca  aHerbivorus insects  aInseto herbivoro  aSicklepod  aSurvey strategy1 aFONTES, E. M. G.1 aPIRES, C. S. S.1 aTEIXEIRA, C. A. D.  tBiological Controlgv. 7, n. 3, p. 288-292, 1996.