Author: Kenneth Eugene FrickPublisher:
ISBN:
Category : Carduus
Languages : en
Pages : 68
Book Description
Biological Control of Thistles in the Genus Carduus in the United States
Author: Kenneth Eugene FrickPublisher:
ISBN:
Category : Carduus
Languages : en
Pages : 68
Book Description
Biological Control of Thistles in the Genus C̲a̲r̲d̲u̲u̲s̲ in the United States
Author: United States. Science and Education AdministrationPublisher:
ISBN:
Category : Thistles
Languages : en
Pages : 50
Book Description
Non-target Impact of the Weed Biological Control Agent Rhinocyllus Conicus on Rare Native California Thistles in the Genus Cirsium
Author: John Conrad HerrPublisher:
ISBN:
Category : Cirsium
Languages : en
Pages : 244
Book Description
Biological Control of Musk Thistle, Carduus Nutans, in South Dakota
Author: Dennis MoriharaPublisher:
ISBN:
Category : Thistles
Languages : en
Pages : 78
Book Description
Biological Control of Thistles in Maryland
Author: Suzanne W. T. BatraPublisher:
ISBN:
Category : Beneficial insects
Languages : en
Pages : 148
Book Description
Insects and Fungi Associated with Cardus Thistles (compositae)
Author: Publisher:
ISBN:
Category : Carduus
Languages : en
Pages : 110
Book Description
Uit een onderzoek naar parasieten die van nature voorkomen op Carduus-distels is gebleken dat er verschillende soorten zijn die mogelijkheden bieden voor de biologische bestrijding van deze distels en soms ook Cirsium-soorten
Non-target Host Utilization of Thistle Species by Introduced Biological Control Agents and Spatial Prediction of Non-target Feeding Habitats
Author: Gregory James WigginsPublisher:
ISBN:
Category :
Languages : en
Pages : 173
Book Description
Rhinocyllus conicus Fröelich and Trichosirocalus horridus (Panzer) were introduced from Europe into North America as biological control agents of the exotic weed species Carduus nutans L. Concern exists over the feeding of these weevils on at least 25 species of native Cirsium thistles. Research was conducted to 1) estimate phenological synchrony of the eight thistle species in Tennessee with R. conicus and T. horridus, 2) investigate naturally-occurring populations of the five native Cirsium thistle species for non-target activity by R. conicus and T. horridus, 3) quantify the impacts to plants of each thistle species to feeding of R. conicus and T. horridus, and 4) identify potential areas of non-target feeding by the weevils using spatial analysis. Phenologies of two native species, C. carolinianum and C. horridulum, are synchronous with R. conicus reproduction, and all eight thistle species are phenologically synchronous with the reproduction of T. horridus. No non-target activity by R. conicus was observed in naturally-occurring populations of Cirsium thistles, but adults of T. horridus were documented for the first time on the native species C. carolinianum, C. horridulum, and C. muticum. In caged plant studies, larvae of R. conicus completed development in heads of C. carolinianum and C. horridulum and reduced seed numbers of both native species. Basal meristems of all eight thistle species exposed to T. horridus were damaged at varying levels in caged plant studies, but no other impacts to plants were observed. Spatial analyses showed associations between Mahalanobis distance values and plant counts of Carduus nutans and Cirsium carolinianum in predicted habitats, and the occurrence of Carduus nutans was associated with the occurrence of both weevil species in these habitats. About 12% of the total study area consisted of habitats where C. nutans and Cirsium carolinianum overlap. The potential exists for these weevils to utilize native Cirsium species found in Tennessee as plant hosts. The spatial model developed during this study not only allows potential monitoring of populations of C. carolinianum to be more targeted, but also may be modified to apply to other systems involving interactions among introduced and native species.
Nontarget Effects of Biological Control
Author: Peter A. FollettPublisher: Springer Science & Business Media
ISBN: 1461545773
Category : Science
Languages : en
Pages : 314
Book Description
Nontarget Effects of Biological Control is the first book of its kind. The environmental safety of biological control has come under scrutiny due to several areas of concerns: the irreversibility of alien introductions, the prevalence of host switching to innocuous native or beneficial species, dispersal of the biocontrol agent to new habitats away from croplands, and the lack of research on the efficacy and impact of biocontrol attempts. The debate has been strongly polarized between conservationists and biological control practitioners. Nontarget Effects of Biological Control proposes that retrospective analyses of systems in place in which nontarget effects are now documented or suspected provide the necessary information for planning and evaluating future releases to reduce risk. The book presents case histories of past biological control introductions from island and continental ecosystems.
Response of Carduus Thistles to Three Biological Control Agents
Author: Bobby Oliver CartwrightPublisher:
ISBN:
Category : Carduus
Languages : en
Pages : 236
Book Description
Evaluating Indirect Ecological Effects of Biological Control
Author: E. WajnbergPublisher: CABI
ISBN: 085199945X
Category : Technology & Engineering
Languages : en
Pages : 281
Book Description
Annotation. A major concern for biological control has always been the risk of indirect unwanted effects on the ecology of other organisms. Our understanding of the ecological and evolutionary processes underlying these effects has until now been limited, and experimental methods are sometimes lacking.This book presents the key papers form the first International Organization for Biological Control global symposium, held in Montpellier, France in October 1999. It addresses the issues and concerns involved in biological control, and assesses the current status of evaluation of the ecologicaleffects.