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Subjects temporal variation Remove constraint temporal variation: temporal variation Subjects geographical distribution Remove constraint geographical distribution: geographical distribution Year 2009 Remove constraint 2009: 2009

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1. Anisotropic spread of hemlock woolly adelgid in the eastern United States

Description:: Includes references
Author:: Morin, Randall S. , Liebhold, Andrew M. , Gottschalk, Kurt W.
Subject:: Adelges tsugae , invasive species , geographical distribution , forest habitats , geographical variation , temporal variation , climatic factors , temperature , host plants , Tsuga canadensis , Tsuga caroliniana , plant density , history , Eastern United States
Collection:: Journal Articles, USDA Authors, Peer-Reviewed
Year:: 2009

2. Identifying and Quantifying Phakopsora pachyrhizi Spores in Rain

Description:: Includes references
Author:: Barnes, C.W. , Szabo, L.J. , Bowersox, V.C.
Subject:: Phakopsora pachyrhizi , rust diseases , plant pathogenic fungi , spores , spore dispersal , geographical distribution , temporal variation , rain , disease detection , assays , disease surveillance , DNA , sequence analysis , genetic variation , frequency , United States
Collection:: Journal Articles, USDA Authors, Peer-Reviewed
Year:: 2009

3. Marketing time predicts naturalization of horticultural plants

Description:: Includes references
Author:: Pemberton, Robert W. , Liu, Hong
Subject:: ornamental plants , horticultural crops , invasive species , introduced plants , ecological invasion , marketing , plant nurseries , temporal variation , agroecological zones , geographical distribution , growth habit , plant architecture , history , prediction , imports , Florida
Collection:: Journal Articles, USDA Authors, Peer-Reviewed
Year:: 2009

4. Population Genetic Structure of Aphis glycines

Description:: Includes references
Author:: Michel, Andrew P. , Zhang, Wei , Jung, Jin Kyo , Kang, Sung-Taeg , Mian, M.A. Rouf
Subject:: Aphis glycines , insect pests , plant pests , population structure , population genetics , invasive species , geographical distribution , adaptation , microsatellite repeats , genetic markers , alleles , genetic polymorphism , loci , genetic variation , heterozygosity , genotype , geographical variation , clones , temporal variation , asexual reproduction , North America , South Korea
Collection:: Journal Articles, USDA Authors, Peer-Reviewed
Year:: 2009

5. Structure of the U.S. Beekeeping Industry: 1982-2002

Description:: Includes references
Author:: Daberkow, Stan , Korb, Penni , Hoff, Fred
Subject:: apiculture , agricultural industry , economic structure , temporal variation , industry trends , honey bees , honey bee colonies , inventories , farms , geographical distribution , farm size , sales , government payments , beekeepers , Census of Agriculture , United States
Collection:: Journal Articles, USDA Authors, Peer-Reviewed
Year:: 2009