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Tansy Ragwort Senecio Jacobaea L
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Book Synopsis Tansy Ragwort, Senecio Jacobaea L. by : L. C. Burrill
Download or read book Tansy Ragwort, Senecio Jacobaea L. written by L. C. Burrill and published by . This book was released on 1994 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Integrated Control of Tansy Ragwort (Senecio Jacobaea L.) by : Claudia L. Powers Evans
Download or read book Integrated Control of Tansy Ragwort (Senecio Jacobaea L.) written by Claudia L. Powers Evans and published by . This book was released on 1980 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ecology and Management of Tansy Ragwort (Senecio Jacobaea L.) by : Jim Jacobs
Download or read book Ecology and Management of Tansy Ragwort (Senecio Jacobaea L.) written by Jim Jacobs and published by . This book was released on 2009 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Tansy Ragwort (Senecio Jacobaea L.) Habitat Variations in the State of Oregon by : Ruth E. Burroughs Lefevre
Download or read book Tansy Ragwort (Senecio Jacobaea L.) Habitat Variations in the State of Oregon written by Ruth E. Burroughs Lefevre and published by . This book was released on 1989 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Biological Control of Tansy Ragwort (Senecio Jacobaea L.) on a Disturbed Coastal Prairie in Del Norte County, California by : Lorraine J. Holden
Download or read book Biological Control of Tansy Ragwort (Senecio Jacobaea L.) on a Disturbed Coastal Prairie in Del Norte County, California written by Lorraine J. Holden and published by . This book was released on 1989 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ragwort, Senecio Jacobaea L. by : Victoria. Vermin and Noxious Weeds Destruction Board
Download or read book Ragwort, Senecio Jacobaea L. written by Victoria. Vermin and Noxious Weeds Destruction Board and published by . This book was released on 1976 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Tansy Ragwort (Senecio Jacobaea). by :
Download or read book Tansy Ragwort (Senecio Jacobaea). written by and published by . This book was released on 2012* with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Disk and Ray Achene Development and Germination Characteristics of Tansy Ragwort by : Ann Louise Baker
Download or read book Disk and Ray Achene Development and Germination Characteristics of Tansy Ragwort written by Ann Louise Baker and published by . This book was released on 1982 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Tansy Ragwort, Senecio Jacobaea by :
Download or read book Tansy Ragwort, Senecio Jacobaea written by and published by . This book was released on 2011* with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Environmental Controls on the Capacity of Tansy Ragwort (Senecio Jacobaea L.) to Compensate for Defoliation by Cinnabar Moth (Tyria Jacobaeae L.) by : Caroline Shipley Cox
Download or read book Environmental Controls on the Capacity of Tansy Ragwort (Senecio Jacobaea L.) to Compensate for Defoliation by Cinnabar Moth (Tyria Jacobaeae L.) written by Caroline Shipley Cox and published by . This book was released on 1981 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Induced changes in Tansy Ragwort Senecio jacobaea (L.), leaf chemistry, and their effects on the Cinnabar moth Tyria jacobaeae L., (Arctiidae: Lepidoptera) by : Andrew Wilcox
Download or read book Induced changes in Tansy Ragwort Senecio jacobaea (L.), leaf chemistry, and their effects on the Cinnabar moth Tyria jacobaeae L., (Arctiidae: Lepidoptera) written by Andrew Wilcox and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ragwort, Senecio Jacobaea written by and published by . This book was released on 2013 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Patterns of Regrowth and Chemical Defense in Tansy Ragwort (Senecio Jacobaea) by : Lisa Joanne Michels
Download or read book Patterns of Regrowth and Chemical Defense in Tansy Ragwort (Senecio Jacobaea) written by Lisa Joanne Michels and published by . This book was released on 1996 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dietary Factors Influencing the Toxicity of Tansy Ragwort (Senecio Jacobaea) in Animals by : Robert Alphonso Swick
Download or read book Dietary Factors Influencing the Toxicity of Tansy Ragwort (Senecio Jacobaea) in Animals written by Robert Alphonso Swick and published by . This book was released on 1979 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Senecio jacobaea (tansy ragwort) is a poisonous plant responsible for livestock deaths in the Pacific Northwest. Horses and cattle are susceptible, while sheep are resistant to the toxic action of the pyrrolizidine alkaloids which the plant contains. Hepatic enzymes are responsible for the biotransformation of pyrrolizidine alkaloids into tissue damaging pyrrole metabolites. The objective of this investigation was to determine the relationship between diet and the toxicity of tansy ragwort. In Part A of the study, toxicity of tansy ragwort was not found to be significantly altered (P
Book Synopsis Adequacy of Hand-defoliation of Tansy Ragwort (Senecio Jacobaea L.) as a Simulation of Defoliation by Cinnabar Moth (Tyria Jacobaeae (L.)) by : Diane Henneberger
Download or read book Adequacy of Hand-defoliation of Tansy Ragwort (Senecio Jacobaea L.) as a Simulation of Defoliation by Cinnabar Moth (Tyria Jacobaeae (L.)) written by Diane Henneberger and published by . This book was released on 1986 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hand-defoliation was evaluated for its ability to simulate herbivory by cinnabar moth larvae, Tyria jacobaeae (L.) (Arctiidae) on the weed tansy ragwort, Senecio jacobaea L. (Asteraceae). The evaluation was done on a field population of flowering ragwort, for three different timings (early, middle, and late season) of damage. In the insect-defoliation treatments third and fourth instar larvae were introduced to plots of ragwort and allowed to consume foliage and flower heads over a 12- day period. In the hand-defoliation treatments leaf laminae were stripped by hand from the petioles, and all floral material was picked off during a single day that corresponded with the end of the insect-defoliation period. Both hand- and insect-defoliation resulted in low (0-20%) survival rates similar to that of undefoliated plants. Larvae sometimes left small amounts of foliage and flower heads on the plants, but these did not affect the regrowth response of the plant. Both damage methods yielded similar effects on the amount of secondary (regrowth) foliage, the timing of reproduction, and the number of secondary capitula (flower heads). There were small but significant differences between the 2 methods in the initial rates of regrowth, in stem and capitula height, and in biomass of stems. Extending the time period of hand-defoliation resulted in a stem height like that of insect-defoliated plants. Where simulation of herbivory over a wider range in times of attack is desired, provision must be made for plant parts that escape damage in very early (e.g.", basal leaves) and very late (e.g., mature capitula) times of attack. Observation of a natural population of cinnabar moth larvae revealed that the few larvae remaining late in the season may damage regrowth as it appears on some plants; repeated damage to regrowth could also be simulated by hand-defoliation. Hand-defoliation was judged to be adequate in simulating the effects of cinnabar moth damage on parameters affecting the birth and death rates of ragwort. The tests comparing the defoliation methods were sufficiently sensitive to detect the effect of the timing of damage on the number of secondary capitula and amount of secondary foliage.
Book Synopsis Longitarsus Jacobaeae Swiss Biotype Effect on Tansy Ragwort (Senecio Jacobaea) in Naramata, British Columbia by : Susan C. Turner
Download or read book Longitarsus Jacobaeae Swiss Biotype Effect on Tansy Ragwort (Senecio Jacobaea) in Naramata, British Columbia written by Susan C. Turner and published by . This book was released on 2022 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: The flea beetle, Longitarsus jacobaeae (Swiss biotype), exhibited a classical biological control pattern on its host plant tansy ragwort (Senecio jacobaea L.) in Naramata, B.C. by rapidly increasing in number after its release and causing the decline of the plant. L. jacobaeae's presence was identified by approximately 1.6-mm2 feeding holes in the ragwort's leaves. L. jacobaeae fed preferentially on rosettes (p=0.0333) as opposed to bolted plants (p=0.4621). It caused a visibly significant decrease in the number of rosettes and bolted plants combined at the trial sites in 3-4 years (p=0.0221). From the point of release, L. jacobaeae dispersed 100 m over the study site in 4 years.
Book Synopsis Effect of Early Exposure of Tansy Ragwort (Senecio Jacobaea) on Future Grazing Preferences of Sheep by : Victor Hugo Naranjo R.
Download or read book Effect of Early Exposure of Tansy Ragwort (Senecio Jacobaea) on Future Grazing Preferences of Sheep written by Victor Hugo Naranjo R. and published by . This book was released on 1987 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tansy ragwort (Senecio iacobea) is a widely distributed weed in the Pacific Northwest (U.S.A.) where it causes severe damage to the livestock industry. Sheep are highly resistant to toxic effects of ragwort, therefore, induction of ragwort preference in sheep was sought as a means to control this poisonous plant. The effect of two early exposure periods to tansy ragwort on future grazing preferences of five sheep genotypes was evaluated. Lambs were exposed at six months of age (ragwort fed fresh), and then at 15 months of age (ragwort fed as pellets). Four treatment groups were created; lambs exposed during both periods (T1), lambs exposed only during the first period (T2), lambs exposed only during the second period (T3), and lambs not exposed in either period (T4). Ragwort preferences were evaluated at 17 (Exp.l) and 19 (Exp. 2) months of age through direct grazing observation, and through plant observation before and after grazing. Experimental animals grazed in paddocks naturally infested with the weed. Results showed no treatment effects on preferences for tansy ragwort. In Exp.l consumption of the weed was so limited that comparisons were not possible between sheep genotypes nor between treatment groups. In Exp. 2 an interaction (p