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Kevin J Gaston - One of the best experts on this subject based on the ideXlab platform.

  • the geographical range structure of the Holly leaf miner iv effects of variation in host plant quality
    Journal of Animal Ecology, 2004
    Co-Authors: Kevin J Gaston, David R Genney, Maddie Thurlow, Susan E Hartley
    Abstract:

    Summary 1 Spatial variation and covariation in host-plant quality, herbivore abundance and herbivore mortality were examined across the natural geographical range in Europe of Holly Ilex aquifolium and the host-specific Holly leaf-miner Phytomyza ilicis. 2 Although measures of host-plant quality showed substantial between-site variation, no simple spatial pattern in any of the measures (only phosphorus content and leaf mass showed correlations with latitude, longitude or altitude) was detected, and few correlations with tree or local site characteristics. 3 In contrast, measures of the abundance of the leaf-miner exhibited marked spatial patterns, resulting in a lack of simple covariance between leaf-miner abundance and host-plant quality. 4 Different apparent mortalities of the leaf-miner exhibited varied spatial patterns in their intensity, but no evidence of range-wide density dependence, again resulting in few patterns of covariance between intensity of mortality and measures of host-plant quality. 5 The population dynamics of the Holly leaf-miner across its geographical range are complex. At any site, the mortality that a population experiences is the sum of largely independent yet spatially structured components, against a background of varying host-plant quality. Despite lacking any marked spatial structure, host-plant quality may have important local effects. These are difficult to detect regionally, and thus may principally contribute noise to regional patterns of levels of oviposition, abundance and mortality.

  • the geographical range structure of the Holly leaf miner iii cold hardiness physiology
    Functional Ecology, 2003
    Co-Authors: C J Klok, Steven L Chown, Kevin J Gaston
    Abstract:

    Summary 1The thermal tolerances of a phytophagous insect, the Holly Leaf-miner Phytomyza ilicis Curtis, a specialist on Holly Ilex aquifolium L., were investigated to determine whether these contribute to the high levels of miscellaneous larval mortalities that play an important role in determining the local abundances of this species across its geographical range. 2Temperatures of crystallization, lower and upper lethal temperatures and rapid cold hardening experiments indicated that the Holly Leaf-miner has a pronounced cold hardiness, exceeding that of its host plant. Acute exposure to cold does not therefore contribute directly to miscellaneous mortalities and neither do summer temperatures exceed the upper lethal limits of the larvae. 3Holly Leaf-miner densities are north-skewed; in the south densities gradually taper off and disappear well north of the distribution limits of the host plant. The parasitoid Chrysocharis gemma causes high larval mortalities in the centre of the distribution of the Holly Leaf-miner and is absent in the cold north, with the level of parasitism being positively correlated with miscellaneous mortalities. Only C. gemma adults overwinter and the attacks on Holly Leaf-miner, starting late winter, are likely opportunistic. This, and C. gemma's absence in the cold north, suggest significant cold susceptibility in C. gemma larvae. Thus, the greater proportion of miscellaneous larval mortalities of the Holly Leaf-miner are possibly the result of pre-premature deaths when C. gemma larvae are killed by cold snaps in late winter.

Denver Post Institution - One of the best experts on this subject based on the ideXlab platform.

  • Owen to leave GW Sugar, reports say
    Colorado State University. Libraries, 2020
    Co-Authors: Denver Post Institution, Rocky Mt. News Institution, Great Western Sugar Company Research Library Institution, Transcript Institution, Imperial Republican Institution, Business Farmer Institution
    Abstract:

    Persons mentioned: Owen, Robert R.; White, William M.; Wilber, George E.; Wilber, George E., Jr.; Wilber, George; Wilber, George, Jr.; White; Owen; Weekly Tribune; Troudt, Glenn A.; McGuffey, William C.; Kemp, Frank A.; Zimmerman; Gwin, Robert; Bristol, Ralph F., Jr.; Zimmerman, Vernon F.; Troudt; Evans, John B.; Sakata, Robert Y.; Sakata; Seaworth, Harlan; Youngquist, Rodney; Manahan, Patrick; Ruckelshaus, William D.; Hansen, Cliff; Williamson, Art; Williamson; Spurgin, Abe; Decker, Harold; Davidson, Jim; Brazeal, Barbara; Brazeal; Brazeal, Bill; Fisher, Alice; Burton, William D.; Burton; Swaney, Oliver H.; Gwin, Robert N.; Swaney, Mitchell; Gwin; Feland, L. W. Bill; Baker, E. M. Bob; Williams, Edger O.; Shyne, Nick L.; Tregoning, W. Vern; Brown, Lynn; Swaney; Williams, Edgar O.; Jewel, William; Rudolph, Gordon; Johnson; Rudolph; Henderson; Henry, LaMar C.; Henry; Tregoning; McGhee, Larry; McGhee, Larry L.; McGhee; Lyon, Jim; Schreiner, James; Vigil, Veronica Rose; Vigil, Gus; Elkins, Robert Neal; Kauffman, Jewel; Baldwin, Don; Sanz, Phil; Davis, Donald B.; Elkins, Michael; Vigil, Teresa; Mondragon, Anita; Hart, Charlotte; Rodriquez, Joe; Mais, Bob; Buckendorf, Robert; Vigil, Eugene; Vigil, Gregory; John; Harnke, Richard; Harnke, Tom; Vigil, John; Kauffman; Davis, Don; Elkins; Rawson, Jim; Rawson; Bush, Charley; Bush; Henry, Lamar; Daven, Clarence, Jr.; Davan; Johnson, Lee; Bill, Philips; Philips; Jueneman, Rich; Giauque, Lowell; Giauque; Bunker, John B.; Bunker; Gilbert, John; Gilbert; Tutt, Russell; Shields, Rodney B.; Shields; Moon, Thomas S.; Leob, John L., Jr.; Schmults, Edward C.; Taylor, A. Thomas; Crane, John C.; Crane; Roadman, Harry; Roadman; Jensen, Lloyd T.; Jensen; McFeely, Blake H.; Davan, Clarence F., Jr.; Wood, Ralph; Jensen, L. T.; Oldemeyer, Robert.Organizations mentioned: GW Sugar; Great Western Sugar Co.; Great Western United Corp; Ford Motor Co.; Great Western; Great Western Sugar Company; Great Western United; Great Western Sugar; Great Western Cities Inc.; AP; House Agriculture Committee; Puerto Rican Sugar; GW Sugar Co.; GW; Holly Sugar Co.; Colorado Migrant Council Office; National Sugarbeet Growers Federation; Mountain States Beet Growers Marketing Association; ASCS; Holly Sugar Company; Lamplighter Restaurant-Motel; Environmental Protection Agency; EPA; US Senator; Wyoming Health Department; Holly; Alliance High School; GWS; Ottawa University; State Migrant Council; Great Western Sugar Company; University of Missouri; William Jewell College; Valentine Redford Advertising Agency; Roosevelt High School; Plain Grains Co.; Equity Co-op Exchange; Mountain States Beet Growers Assn.; International Minerals and Chemical Co.; Purdue University; Holly Sugar Corp; Holly Sugar; Broadmoor Hotel; US Treasury; Senate Finance Committee; Chamber of Commerce; Western Colorado Sugar Beet Growers Assn.; UPI; EPA; IBM Corporation; Great Western Foods Company; Great Western Railway Company

  • May 1-10, 1966 clippings file, noted traveler A. M. Ginn of Bayard comes home after three years on assembly circuit
    Colorado State University. Libraries, 2020
    Co-Authors: Kyle, Ted Author, Denver Post Institution, Tyson, Monk Author, Marshall, Con Author, Margolin, Morton L. Author, Gulick, Lewis Author, Nover, Barnet Author, Star-herald Institution, Rocky Mountain News Institution, Bridgeport News-blade Institution
    Abstract:

    Persons mentioned: Ginn, A. M.; Ginn; Timbuktu; Hodge, Russ; McHarg, Jean; McHarg; Harg; Giauque, Lowell; Giauque; Briggs, C. W.; Briggs; Ullrich, Herb; Harris, Lionel; Harris; Ullrich; Evertson, Mick; Evertson; Tanner, J. C.; Jack; Johnson, H. P. H.; Tanner; Smith, Rudolp; Margolin; Bekaert, A. C.; Smith; Bekaert; Tyson, Charles; White, William M.; Eckles, Richard T.; Eckles; Redabaugh, Don; Redenbaugh; Gary; Bunker, John B.; Kemp, Frank A.; Bunker; Castro, Fidel; Castro; Kremlin; Walker, Ronald; Dappen, T. R.; Walker; Dappen; Tutt, Russell T.; O'Rourke, Dennis; Maytag, L. B.; Maytag, L. B., Jr.; Maytag; Allott, Gordon; Allott; Muskie, Edmund; Ils, John.Organizations mentioned: Southern School Assemblies Agency; Great Western Sugar; School Assemblies Agency; Hollywood; Hilton; Peace Corps; Colorado State University; Great Western Sugar Company; American Crystal Sugar Co.; Scotts Bluff Experiment Station; Nebraska Crop Improvement Association; CF&I; Penn Mutual Life Insurance Co.; Brown Palace Hotel; Water Pollution Control Commission; Feder Water Pollution Control Agency; Department of Health; Great Western Sugar Co.; Colorado University; GW; Great Western; US Public Health Service; State Health Department; State Department of Public Health; Holly Sugar Corp; Maytag Co.; National Airlines; ASC; Holly Sugar; Holly; Great Western Railway Co; Public Utilities Commission

  • Beet quota vital, area growers told
    Colorado State University. Libraries, 2020
    Co-Authors: Western Press Institution, Billings Gazette Institution, Denver Post Institution, Clipping Bureau Institution, Albuquerque Tribune Institution, Superior Clipping Service Institution
    Abstract:

    Persons mentioned: Blake, Richard W.; Blake; Owen, Robert; Norsworthy, Lamar; Owen.Organizations mentioned: National Sugar Beet Growers Federation; Great Western; Evergreen; Holly Corp; Navajo Refining Co.; Holly; Great Western Sugar Beet Co

  • Feb. 21-29, 1966 clippings file, sugar co. blamed for pollution
    Colorado State University. Libraries, 2020
    Co-Authors: Martin, Ovid A. Author, Sterling Journal-advocate Institution, Rocky Mountain News Institution, Martin, Morgan Author, Logan, William Author, Fort Collins Coloradoan Institution, Longmont Times Call Institution, Mitchell Index Institution, Fort Morgan Times Institution, Denver Post Institution
    Abstract:

    Persons mentioned: Stein, Murray; Stein; Johnson, Leonard; Johnson; Rozich, Frank; Rozich; Jensen, Lloyd T.; Jensen; Hicks, Curtis C.; Hicks; Sweeney, O. W.; Reece, Richard J.; Reece; Downie, Andrew R.; Fischer, James H.; Kemp, Frank A.; Hirsch, Charles E.; Castro, Fidel; O'Rourke, Dennis; O'Rourke; Hicks, Curtis; Wilson, Duane; Cozzens, Fred; Severin, Dean; Cozzens, Charles; Tateyama, Harold; Swanson, Ted; Al Wiedeman.Organizations mentioned: Great Western Sugar Co; US Public Health Service; Great Western; Sugar Co.; Oil and Gas Commission; Game, Fish and Parks Commission; AP; Federal Crop Insurance Corp; USDA; GW; Great Western Sugar Co.; European Launcher Development Organization; ELDO; UPI; American Society of Sugar Beet Technologists; CSU; Colorado State University; US Department of Agriculture; Holly Sugar Corp; Central Bank & Trust Co.; Mao & Co.; Holly Co.; US Agriculture Department; Holly; ASC; Ovid Church Annex; Great Western Sugar Company; Northern Colorado Farm and Ranch Management Association; Eaton Potato Growers Cooperative; PHS

  • Sugar firm names Miles senior vp
    Colorado State University. Libraries, 2020
    Co-Authors: Rocky Mountain News Institution, Denver Post Institution
    Abstract:

    Persons mentioned: Miles, George, Jr. W.; Miles; Paine, Larry W.; Padget I. I.I, Frederick C.; Foster, George W.; Schurman, Glenn A.; Vallens, Eduards; Fisher, Bruce W.Organizations mentioned: Holly Sugar Corp.; Holly; Stanford University; American Society of Sugar Beet Technologists; American Institute of Chemical Engineers; American Society of Food & Drug Administrators; Corporate Development of Electro Medical Systems, Inc.; Consolidated Coal Co.; Walter Kidde and Co.; Wheat Ridge- Based Company; Chenron Oil Co.; Stone & Webster Engineering Corp.; Houston Corp.; Purolator Courier Corp.; National Safety Council

Goodland Daily News Institution - One of the best experts on this subject based on the ideXlab platform.

  • Newspaper clippings re Great Western Sugar Company and Great Western United Corporation
    Colorado State University. Libraries, 2020
    Co-Authors: Wall Street Journal Institution, Billings Gazette Institution, Business Farmer Institution, Scottsbluff Star-herald Institution, Fort Morgan Institution, Colo Times Institution, Republican-courier Institution, Goodland Daily News Institution
    Abstract:

    Persons mentioned: Everett, Robert G.; Everett; Fisher, Robert J.; Fisher; Bunker; Bunker, John B.Organizations mentioned: Great Western United; Great Western United Corp.; Securities and Exchange Commission; SEC; New York Stock Exchange; Shakey's, Inc.; Internal Revenue Service; Great Western Producers Co-operative; Great Western Sugar; Amstar Corp.; CPC International Inc.; National Sugar Refining Co.; SuCrest Corp.; GWU; GWS; GW; Great Western; Great Western Sugar Company; GW Sugar; Holly Sugar; Holly; Holly Sugar Corporation

  • Nov. 1967 clippings file, farming and ranching
    Colorado State University. Libraries, 2020
    Co-Authors: Murray, Robert Author, Marshall, Con Author, Margolin, Morton L. Author, Scottsbluff Star-herald Institution, Goodland Daily News Institution, Mccants, Alvin Author, Briggs, Jim Author, Burlington Record Institution
    Abstract:

    Persons mentioned: Henderson, Leonard; Henderson; Worrall, John; Warrall; Harris, Lionel; Silkman, Leon; Silkman, Jill; Silkman, Terry; Silkman, Danny; Sparks, Alden; Higdon, Bill; Higdon; Deeds, Robert; Dean, Eddie; Burk, Glenn; Lindshield, Don; Lindshield; Nelson, John T.; Nelson; Nelson, Hans P.; Burk, Clenn; Burk; Evert; Dick; Bob; Ponsel, Tom; Elliott, Don; Jakobowski, Ivan; Cross, Earl F.; Cross; Fisher, Robert J.; Holmes, Fred G.; Jensen, Lloyd T.; Hiehaus, E. R., Jr.; Oxnard, B. A.; Zumbrink, Frank; Zumbrink; Ostermiller, J. V.; Johnson, Leonard M.; Johnson; Keiser, David M.; Keiser; Rienks, George W.; Rienks; Rienks, Mary Jane; Rienks, George W., Jr.; Britzman, Mary Isabell; Rienks, Howard; Vickery, Max; Vickery; Giauque, Lowell; Giauque; Sanborn, Bob; McGuffey, Bill; Worrall; Ostermiller, Vic; Ostermiller; Guzman, Andy; Aurajo, Manuel; Guzman; Lenhart, Albert; O'Rourke, Dennis; O'Rourke.Organizations mentioned: Great Western Sugar Co.; Great Western; Holly Sugar Co.; Potash Co.; Ideal Cement Co.; Ideal; Ideal Basic Industries Inc.; GW; Great Western Sugar Company; Great Western Company; Vo-Tech; Elks Club; Eaton; Sterling; GW Sugar Co.; Great Western Sugar Company; Loveland Great Western Sugar Company; American Crystal Sugar Co.; Suit; North American Sugar Industries, Inc.; American Crystal Sugar; American Crystal; Cuban-American Sugar Co.; Holly Sugar; Holly; University of Colorado; Fort Collins Sugar Co.; Colorado Crop and Livestock Reporting Service; US Weather Bureau; Nile Valley Co-op Grain Co.; Ft. Collins Sugar Co.; LZP Inc.; Holly Sugar Corp; Internatioal Systems & Controls Corp; Houston Oil Field Material Company, Inc

Business Farmer Institution - One of the best experts on this subject based on the ideXlab platform.

  • Owen to leave GW Sugar, reports say
    Colorado State University. Libraries, 2020
    Co-Authors: Denver Post Institution, Rocky Mt. News Institution, Great Western Sugar Company Research Library Institution, Transcript Institution, Imperial Republican Institution, Business Farmer Institution
    Abstract:

    Persons mentioned: Owen, Robert R.; White, William M.; Wilber, George E.; Wilber, George E., Jr.; Wilber, George; Wilber, George, Jr.; White; Owen; Weekly Tribune; Troudt, Glenn A.; McGuffey, William C.; Kemp, Frank A.; Zimmerman; Gwin, Robert; Bristol, Ralph F., Jr.; Zimmerman, Vernon F.; Troudt; Evans, John B.; Sakata, Robert Y.; Sakata; Seaworth, Harlan; Youngquist, Rodney; Manahan, Patrick; Ruckelshaus, William D.; Hansen, Cliff; Williamson, Art; Williamson; Spurgin, Abe; Decker, Harold; Davidson, Jim; Brazeal, Barbara; Brazeal; Brazeal, Bill; Fisher, Alice; Burton, William D.; Burton; Swaney, Oliver H.; Gwin, Robert N.; Swaney, Mitchell; Gwin; Feland, L. W. Bill; Baker, E. M. Bob; Williams, Edger O.; Shyne, Nick L.; Tregoning, W. Vern; Brown, Lynn; Swaney; Williams, Edgar O.; Jewel, William; Rudolph, Gordon; Johnson; Rudolph; Henderson; Henry, LaMar C.; Henry; Tregoning; McGhee, Larry; McGhee, Larry L.; McGhee; Lyon, Jim; Schreiner, James; Vigil, Veronica Rose; Vigil, Gus; Elkins, Robert Neal; Kauffman, Jewel; Baldwin, Don; Sanz, Phil; Davis, Donald B.; Elkins, Michael; Vigil, Teresa; Mondragon, Anita; Hart, Charlotte; Rodriquez, Joe; Mais, Bob; Buckendorf, Robert; Vigil, Eugene; Vigil, Gregory; John; Harnke, Richard; Harnke, Tom; Vigil, John; Kauffman; Davis, Don; Elkins; Rawson, Jim; Rawson; Bush, Charley; Bush; Henry, Lamar; Daven, Clarence, Jr.; Davan; Johnson, Lee; Bill, Philips; Philips; Jueneman, Rich; Giauque, Lowell; Giauque; Bunker, John B.; Bunker; Gilbert, John; Gilbert; Tutt, Russell; Shields, Rodney B.; Shields; Moon, Thomas S.; Leob, John L., Jr.; Schmults, Edward C.; Taylor, A. Thomas; Crane, John C.; Crane; Roadman, Harry; Roadman; Jensen, Lloyd T.; Jensen; McFeely, Blake H.; Davan, Clarence F., Jr.; Wood, Ralph; Jensen, L. T.; Oldemeyer, Robert.Organizations mentioned: GW Sugar; Great Western Sugar Co.; Great Western United Corp; Ford Motor Co.; Great Western; Great Western Sugar Company; Great Western United; Great Western Sugar; Great Western Cities Inc.; AP; House Agriculture Committee; Puerto Rican Sugar; GW Sugar Co.; GW; Holly Sugar Co.; Colorado Migrant Council Office; National Sugarbeet Growers Federation; Mountain States Beet Growers Marketing Association; ASCS; Holly Sugar Company; Lamplighter Restaurant-Motel; Environmental Protection Agency; EPA; US Senator; Wyoming Health Department; Holly; Alliance High School; GWS; Ottawa University; State Migrant Council; Great Western Sugar Company; University of Missouri; William Jewell College; Valentine Redford Advertising Agency; Roosevelt High School; Plain Grains Co.; Equity Co-op Exchange; Mountain States Beet Growers Assn.; International Minerals and Chemical Co.; Purdue University; Holly Sugar Corp; Holly Sugar; Broadmoor Hotel; US Treasury; Senate Finance Committee; Chamber of Commerce; Western Colorado Sugar Beet Growers Assn.; UPI; EPA; IBM Corporation; Great Western Foods Company; Great Western Railway Company

  • Newspaper clippings re Great Western Sugar Company and Great Western United Corporation
    Colorado State University. Libraries, 2020
    Co-Authors: Wall Street Journal Institution, Billings Gazette Institution, Business Farmer Institution, Scottsbluff Star-herald Institution, Fort Morgan Institution, Colo Times Institution, Republican-courier Institution, Goodland Daily News Institution
    Abstract:

    Persons mentioned: Everett, Robert G.; Everett; Fisher, Robert J.; Fisher; Bunker; Bunker, John B.Organizations mentioned: Great Western United; Great Western United Corp.; Securities and Exchange Commission; SEC; New York Stock Exchange; Shakey's, Inc.; Internal Revenue Service; Great Western Producers Co-operative; Great Western Sugar; Amstar Corp.; CPC International Inc.; National Sugar Refining Co.; SuCrest Corp.; GWU; GWS; GW; Great Western; Great Western Sugar Company; GW Sugar; Holly Sugar; Holly; Holly Sugar Corporation

  • Newspaper clippings re Great Western Sugar Company and Great Western United Corporation
    Colorado State University. Libraries, 2020
    Co-Authors: Universal Press Clipping Bureau Institution, Business Farmer Institution
    Abstract:

    Persons mentioned: Edwards, Al; Edwards; Auger; Auger, Al; Johnson, I. L.; Johnson; Hobert, Gordon; Hobert.Organizations mentioned: GW; Mountain States Beet Growers Assn.; USDA; Great Western; Holly Beets; Holly Sugar Corporation; Mountain States Beetgrowers Association

  • Ovid celebrates 50 years
    Colorado State University. Libraries, 2020
    Co-Authors: Business Farmer Institution, Western Outlook Magazine Institution
    Abstract:

    Persons mentioned: Johnson, James; Rundall, Keith; Smith, Salina; Bennett, Jay; Bennett; Scott, Wayne; Yeager, G.; Yeager, Glen W.; Yeager; Giauque, Lowell; Giauque.Organizations mentioned: Colorado Centennial-Bicentennial Commission; GW; Holly Sugar Corporation; Holly; American Society of Sugar Beet Technologists; USDA; National Defense Executive Reserve; Great Western

Susan E Hartley - One of the best experts on this subject based on the ideXlab platform.

  • the geographical range structure of the Holly leaf miner iv effects of variation in host plant quality
    Journal of Animal Ecology, 2004
    Co-Authors: Kevin J Gaston, David R Genney, Maddie Thurlow, Susan E Hartley
    Abstract:

    Summary 1 Spatial variation and covariation in host-plant quality, herbivore abundance and herbivore mortality were examined across the natural geographical range in Europe of Holly Ilex aquifolium and the host-specific Holly leaf-miner Phytomyza ilicis. 2 Although measures of host-plant quality showed substantial between-site variation, no simple spatial pattern in any of the measures (only phosphorus content and leaf mass showed correlations with latitude, longitude or altitude) was detected, and few correlations with tree or local site characteristics. 3 In contrast, measures of the abundance of the leaf-miner exhibited marked spatial patterns, resulting in a lack of simple covariance between leaf-miner abundance and host-plant quality. 4 Different apparent mortalities of the leaf-miner exhibited varied spatial patterns in their intensity, but no evidence of range-wide density dependence, again resulting in few patterns of covariance between intensity of mortality and measures of host-plant quality. 5 The population dynamics of the Holly leaf-miner across its geographical range are complex. At any site, the mortality that a population experiences is the sum of largely independent yet spatially structured components, against a background of varying host-plant quality. Despite lacking any marked spatial structure, host-plant quality may have important local effects. These are difficult to detect regionally, and thus may principally contribute noise to regional patterns of levels of oviposition, abundance and mortality.