Combined Impacts of Native Grass Competition and Introduced Weevil Herbivory on Canada Thistle (Cirsium arvense)
نویسندگان
چکیده
منابع مشابه
Impacts of Plant Size, Density, Herbivory, and Desease on Native Platte Thistle (Cirsium Canescens)
Based on prior field observations, we hypothesized that individual and interacting effects of plant size, density, insect herbivory, and especially fungal disease, influenced seedling and juvenile plant growth in native Platte thistle populations (Cirsium canescens Nutt.). We worked at Arapaho Prairie in the Nebraska Sandhills (May August 2007), monitoring plant growth, insect damage, and funga...
متن کاملAbsorption and Translocation of Aminocyclopyrachlor and Aminocyclopyrachlor-Methyl Ester in Canada Thistle (Cirsium arvense)
Laboratory studies were conducted using C-aminocyclopyrachlor (DPX-MAT28) and its C-methyl ester formulation (DPX-KJM44) to (1) determine the adjuvants’ effects on absorption, (2) compare the absorption and translocation of aminocyclopyrachlor free acid with the methyl ester, and (3) determine the rate at which aminocyclopyrachlor-methyl ester is metabolized to the free acid in Canada thistle. ...
متن کاملProduction and Wind Dispersal of Canada Thistle (Cirsium arvense L.) Achenes
Quantity, quality and dispersal distance of wind-blown achenes and pappi were determined during the peak time of dispersal over twelve site-years in Minnesota during 2006 and 2007. Approximately twice as many pappi than achenes were trapped. Wind blown pappi tend to travel near the ground. Most achenes fell near the parent plants and their population density declined exponentially with increasi...
متن کاملEnhancing incidence of Puccinia punctiformis, through mowing, to improve management of Canada thistle (Cirsium arvense)
Biological control of Canada thistle using Puccinia punctiformis has been largely unsuccessful in part due to a low incidence of systemically infected shoots and heterogeneous distribution of teliospores in the soil. The present study investigated the feasibility of strategic mowing to improve incidence of systemically infected shoots, and enhance intraand/or inter-season disease development in...
متن کاملUnexpected Ecological Effects of Distributing the Exotic Weevil, Larinus planus (F.), for the Biological Control of Canada Thistle
Rhinocyllus conicus, a weevil introduced for biological control of exotic weeds, has had major nontarget ecological effects on native thistles. Some practitioners have argued that this is an isolated case. We report, however, that another Eurasian weevil (Larinus planus), currently being distributed in North America for the control of Canada thistle (Cirsium arvense), is significantly reducing ...
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ژورنال
عنوان ژورنال: Rangeland Ecology & Management
سال: 2008
ISSN: 1550-7424
DOI: 10.2111/07-142r.1