THE ANALYSIS OF Compsocerus violaceus (White, 1853) (coleoptera, cerambycidae) POPULATION BEHAVIOR RELATED TO CERAMBICIDEOS FAUNA IN CITRIC YARD

Abstract

The present work analyses the population behavior of Compsocerus violaceus (White, 1853) (Coleoptera, Cerambycidae), related to the fauna of cerambicideos, collected in conserved and rio tangerine, baianinha and natal orange, tangor sabará and cravo lemon. The collections were carried out fortnightly, using a plastic bait trap with 20% molasses. The baits were replaced every two weeks. The collection period ranged from August/1983 to JuIy/1985. The ecological parameters studied included the relative abundance, constancy, frequency and dominance. The influence of some meteorological factors over the species population was also investigated. In the abandoned yard 405 adults were collected, comprising 180 males and 225 females, and in the conserved yard, 253 adults were collected, comprising 96 males and 163 females. From the total insects collected, 39% were from the conserved yard, while 61% came from the abandoned yard. The period showing the highest occurrence was the one comprising the months of November and December, in both yards. No correlation between meteorological factors and species fluctuation could be detected. Among the ecological parameters analyzed, C. violaceus was classified as “common and very abundant”, “accidental and constant”. C. violaceus showed a frequency of 10,31% among the collected species, and was considered “dominant” in both yards, obtaining the classification of Dorcacerus barbatus, Macropophora accentifer, Acathoderes jaspidea, Chlorida festiva and Trachyderes spp., all recognized as dangerous species with a remarkable economic importance for the Brazilian fruit-bearing plants.

KEY-WORDS: Insecta; pest; Citrus.