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Exploitative Competition Between Invasive Herbivores Benefits A Native Host Plant, Joseph Elkinton, E. L. Preisser
Exploitative Competition Between Invasive Herbivores Benefits A Native Host Plant, Joseph Elkinton, E. L. Preisser
Joseph Elkinton
Although biological invasions are of considerable concern to ecologists, relatively little attention has been paid to the potential for and consequences of indirect interactions between invasive species. Such interactions are generally thought to enhance invasives' spread and impact (i.e., the “invasional meltdown” hypothesis); however, exotic species might also act indirectly to slow the spread or blunt the impact of other invasives. On the east coast of the United States, the invasive hemlock woolly adelgid (Adelges tsugae, HWA) and elongate hemlock scale (Fiorinia externa, EHS) both feed on eastern hemlock (Tsuga canadensis). Of the two insects, HWA is considered far more …
Comparing Gala Apple Trees On Different Strains Of B.9, M.9, M.26, And Other Rootstocks: An Update On The 2002 Nc-140 Apple Rootstock Trial, Wesley Autio, James Krupa, Jon Clements
Comparing Gala Apple Trees On Different Strains Of B.9, M.9, M.26, And Other Rootstocks: An Update On The 2002 Nc-140 Apple Rootstock Trial, Wesley Autio, James Krupa, Jon Clements
Wesley Autio
No abstract provided.
Comparing Mcintosh Apple Trees On Several Geneva And Supporter Rootstocks: An Update On The 1999 Nc-140 Dwarf Apple Rootstock Trial, Wesley Autio, James Krupa, Jon Clements
Comparing Mcintosh Apple Trees On Several Geneva And Supporter Rootstocks: An Update On The 1999 Nc-140 Dwarf Apple Rootstock Trial, Wesley Autio, James Krupa, Jon Clements
Wesley Autio
No abstract provided.
Enhancing Return Bloom Of Honeycrisp Apples With Ethephon, Wesley Autio
Enhancing Return Bloom Of Honeycrisp Apples With Ethephon, Wesley Autio
Wesley Autio
No abstract provided.
Effect Of Surfactants On Bioherbicidal Activity Of Alternaria Helianthi On Multiple-Seeded Cocklebur, Prasanta C. Bhowmik, H. K. Abbas, D. Sanyal
Effect Of Surfactants On Bioherbicidal Activity Of Alternaria Helianthi On Multiple-Seeded Cocklebur, Prasanta C. Bhowmik, H. K. Abbas, D. Sanyal
Prasanta C. Bhowmik
Abstract: Multiple-seeded cocklebur (Xanthium strumarium L.) is a biotype which has different morphology and higher seedling production ability than common cocklebur. Greenhouse studies were conducted to investigate the bioherbicidal activity of Alternaria helianthi (Hansf.) Tubaki and Nishih. on multiple-seeded cocklebur as affected by various rates of Tenkoz COC® (crop oil concentrate), Activator 90® (non-ionic surfactant), BAS 9050 0 S® (methylated oil), Silwet L-77® (organosilicone surfactant) and Top film® (natural based surfactant). Taking X as the recommended rate for each surfactant, 0-X, ¼-X, ½-X, X and 2-X rates were used for each of the surfactants. Surfactants were added to the conidial …
Can Carbaryl Enhance Ethephon’S Value As A Late-Season Thinner?, Wesley Autio, James Krupa, Winfred Cowgill Jr.
Can Carbaryl Enhance Ethephon’S Value As A Late-Season Thinner?, Wesley Autio, James Krupa, Winfred Cowgill Jr.
Wesley Autio
No abstract provided.
Comparative Analysis Of Multiple Disease Resistance In Ryegrass And Cereal Crops, Young-Ki Jo, Reed Barker, William Pfender, Scott Warnke, Sung-Chur Sim, Geunhwa Jung
Comparative Analysis Of Multiple Disease Resistance In Ryegrass And Cereal Crops, Young-Ki Jo, Reed Barker, William Pfender, Scott Warnke, Sung-Chur Sim, Geunhwa Jung
Geunhwa Jung
Ryegrass (Lolium spp.) is among the most important forage crops in Europe and Australia and is also a popular turfgrass in North America. Previous genetic analysis based on a three-generation interspecific (L. perenne 9 L. multiflorum) ryegrass population identified four quantitative trait loci (QTLs) for resistance to gray leaf spot (Magneporthe grisea) and four QTLs for resistance to crown rust (Puccinia coronata). The current analysis based on the same mapping population detected seven QTLs for resistance to leaf spot (Bipolaris sorokiniana) and one QTL for resistance to stem rust (Puccinia graminis) in ryegrass for the first time. Three QTLs for …
Comparing Mcintosh Apple Trees On Geneva And Supporter Rootstocks: An Update On The 1999 Nc-140 Semidwarf Apple Rootstock Trial, Wesley Autio, James Krupa, Jon Clements
Comparing Mcintosh Apple Trees On Geneva And Supporter Rootstocks: An Update On The 1999 Nc-140 Semidwarf Apple Rootstock Trial, Wesley Autio, James Krupa, Jon Clements
Wesley Autio
No abstract provided.
Are The Effects Of Crop Load Altered By Rootstock? An Update On The 2003 Nc-140 Apple Physiology Trial, Wesley Autio, James Krupa
Are The Effects Of Crop Load Altered By Rootstock? An Update On The 2003 Nc-140 Apple Physiology Trial, Wesley Autio, James Krupa
Wesley Autio
No abstract provided.
Nectar Secondary Compounds Affect Self-Pollen Transfer: Implications For Female And Male Reproduction, Rebecca E. Irwin, Lynn Adler
Nectar Secondary Compounds Affect Self-Pollen Transfer: Implications For Female And Male Reproduction, Rebecca E. Irwin, Lynn Adler
Lynn Adler
Pollen movement within and among plants affects inbreeding, plant fitness, and the spatial scale of genetic differentiation. Although a number of studies have assessed how plant and floral traits influence pollen movement via changes in pollinator behavior, few have explored how nectar chemical composition affects pollen transfer. As many as 55% of plants produce secondary compounds in their nectar, which is surprising given that nectar is typically thought to attract pollinators. We tested the hypothesis that nectar with secondary compounds may benefit plants by encouraging pollinators to leave plants after visiting only a few flowers, thus reducing self-pollen transfer. We …