02545naa a2200481 a 450000100080000000500110000800800410001910000170006024501610007726000090023852012670024765000160151465000130153065000120154365000120155565000170156765000170158465000130160165000170161465000130163165000150164465000140165965000100167365000180168365000170170165000140171865000100173265000100174265000150175265000160176765000110178365300280179465300140182265300270183665300120186365300200187565300170189565300140191265300100192665300170193670000190195377300910197213033072024-05-21       1989    bl uuuu     u00u1 u    #d1 aRAFFA, K. F.  aMicrosite and interspecific interactions affecting emergence of root-infesting pine weevils (ColeopterabCurculionidae) in Wisconsin.h[electronic resource]  c1989  aThe seasonal emergence patterns of Hylobius radicis, H. pales and Pachylobius picivorus infesting Pinus sylvestris trees in Wisconsin were determined in 1986. The pests emerged in the following sequence: H. radicis (mean emergence date 12 July), H. pales (6 August) and P. picivorus (14 September). The sex ratio for each species was 1:1, but the distribution of emerging adults per tree varied with species. Usually only one adult of H. radicis emerged per tree, whereas the distribution of H. pales was much more clustered (6.82 adults/tree). Brood production within a site was directly related to elevation along a slope. This was probably caused by differential exposure to flooding. All 3 species can breed and develop successfully in the same tree concurrently, and there was no evidence of competition between the primary species, H. radicis, and the secondary species. Co-occurrence generally facilitated development of the various species, suggesting that moderate-sized trees killed by H. radicis may provide a reservoir for development by H. pales and P. picivorus, which could then damage seedlings by adult feeding. Experiments with pitfall traps baited with ethanol plus turpentine confirmed that only overwintered adults respond to olfactory cues.  aattractants  aconifers  aecology  aethanol  aforest pests  aforest trees  aHylobius  ainsect pests  amixtures  amonitoring  aphenology  aPinus  apitfall traps  areproduction  asex ratio  atraps  atrees  aturpentine  aEmergência  aInseto  aAgricultural entomology  aBehaviour  aBiological competition  aBiology  aBroca de raizes  aDistribution  aEmergence  aPines  aRoot weevils1 aHUNT, D. W. A.  tAnnals of the Entomological Society of America, Lanhamgv. 82, n. 4, p. 438-445, 1989.