caa a22 4500 386360901 CHVBK 20180307111914.0 cr unu---uuuuu 161130e198901 xx s 000 0 eng 10.4039/Ent12193-1 doi S0008347X00028534 pii (NATIONALLICENCE)cambridge-10.4039/Ent12193-1 DO BALSAM TWIG APHIDS (HOMOPTERA: APHIDIDAE) LOWER TREE SUSCEPTIBILITY TO SPRUCE BUDWORM? [Elektronische Daten] The balsam twig aphid, Mindarus abietinus Koch, infested nearly all trees in a range-wide provenance plantation of balsam fir, Abies balsamea (L.) Mill., in Michigan. Infestation levels were highest on eastern and lowest on western seed sources of fir. Large populations of the aphid were correlated with low survival and reduced developmental rates of the spruce budworm, Choristoneura fumiferana (Clemens). We propose that chronic, high susceptibility of trees to aphids could reduce concomitant susceptibility to budworm through direct (competition) and indirect (host and community-level) effects. Copyright © Entomological Society of Canada 1989 Mattson William J. North Central Forest Experimental Station, U.S.D.A. Forest Service, Pesticide Research Center, and Department of Entomology, Michigan State University, East Lansing, Michigan, USA 48824 Haack Robert A. North Central Forest Experimental Station, U.S.D.A. Forest Service, Pesticide Research Center, and Department of Entomology, Michigan State University, East Lansing, Michigan, USA 48824 Lawrence Robert K. Department of Entomology, Michigan State University, East Lansing, Michigan, USA 48824 Herms Daniel A. Department of Entomology, Michigan State University, East Lansing, Michigan, USA 48824 The Canadian Entomologist Cambridge University Press 121/1(1989-01), 93-103 0008-347X 121:1<93 1989 121 TCE https://doi.org/10.4039/Ent12193-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.4039/Ent12193-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Mattson William J. North Central Forest Experimental Station, U.S.D.A. Forest Service, Pesticide Research Center, and Department of Entomology, Michigan State University, East Lansing, Michigan, USA 48824 NATIONALLICENCE 700 1- Haack Robert A. North Central Forest Experimental Station, U.S.D.A. Forest Service, Pesticide Research Center, and Department of Entomology, Michigan State University, East Lansing, Michigan, USA 48824 NATIONALLICENCE 700 1- Lawrence Robert K. Department of Entomology, Michigan State University, East Lansing, Michigan, USA 48824 NATIONALLICENCE 700 1- Herms Daniel A. Department of Entomology, Michigan State University, East Lansing, Michigan, USA 48824 NATIONALLICENCE 773 0- The Canadian Entomologist Cambridge University Press 121/1(1989-01), 93-103 0008-347X 121:1<93 1989 121 TCE CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge