EurekaMag.com logo
+ Translate

Demographic and biomass production consequences of inundative treatment of Cirsium arvense with Sclerotinia sclerotiorum


, : Demographic and biomass production consequences of inundative treatment of Cirsium arvense with Sclerotinia sclerotiorum. Biocontrol Science & Technology 5(1): 11-25

The adventitious shoots in three populations of Cirsium arvense in sheep-grazed pastures were treated in October (spring) 1991 with a mycelium/wheat formulation of Sclerotina sclerotiorum and the fates of mapped shoots were followed over the growing season. In untreated plots, deaths, through natural causes were compensated for by births (emergence of new shoots above the soil) throughout the growing season, but, on plots treated with S. sclerotiorum, deaths from the induced disease exceeded births for 35 days following treatment, causing the shoot population to decline markedly. Disease-induced deaths occurred only among shoots present at the time of treatment; there was no evidence of transfer of the pathogen to shoots emerging after the treatment was applied. A life-table analysis showed that only 8% of the adventitious shoots emerging during the growing season survived to seeding on treated plots, compared with 28% on the untreated plots; most mortalities occurred in shoots at the vegetative stage of development. The dry mass of propagative roots in autumn was reduced to 35% of that on the untreated plots by the pathogen and the density of shoots emerging the following spring was reduced to a similar extent. The results of this study indicate that S. sclerotiorum has potential as a mycoherbicide for C. arvense in sheep-grazed pasture in New Zealand.

(PDF same-day service: $19.90)

Accession: 002590303

DOI: 10.1080/09583159550039981

Submit PDF Full Text: Here


Submit PDF Full Text

No spam - Every submission is manually reviewed

Due to poor quality, we do not accept files from Researchgate

Submitted PDF Full Texts will always be free for everyone
(We only charge for PDFs that we need to acquire)

Select a PDF file:
Close
Close

Related references

Quimby, P.; Gras, S.W.dmer, T.M.ikle, W.S.nds, D., 2004: Formulation of Sclerotinia sclerotiorum for use against Cirsium arvense. Zeitschrift fur Pflanzenkrankheiten und Pflanzenschutz: no 19 491-495

Brosten B.S.; Sands D.C., 1984: Sclerotinia sclerotiorum to control canada thistle cirsium arvense. Phytopathology 74(7): 864-865

Bourdot, G.W.; Hurrell, G.A.; Saville, D.J., 2004: Wounding of Cirsium arvense enhances the efficacy of Sclerotinia sclerotiorum as a mycoherbicide. Two experiments were conducted in which mycelial fragments of the plant-pathogenic fungus Sclerotinia sclerotiorum were applied with an organic food source to Cirsium arvense shoots with and without prior wounding. In the first experiment, more sh...

Bourdot, G.W.; Hurrell, G.A.; Saville, D.J.; Leathwick, D.M., 2006: Impacts of applied Sclerotinia sclerotiorum on the dynamics of a Cirsium arvense population. A field experiment was conducted from October 1992 to March 1997 in a sheep-grazed pasture in Canterbury, New Zealand, to determine the effects of the fungus Sclerotinia sclerotiorum on the long-term dynamics of a population of Cirsium arvense. Th...

Brosten B.S.; Sands D.C., 1986: Field trials of sclerotinia sclerotiorum to control canada thistle cirsium arvense. An isolate of Sclerotinia sclerotiorum (Lib.) de Bary collected from a Canada thistle [Cirsium arvense (L.) Scop. #3 CIRAR] plant in Montana [USA] proved pathogenic on Canada thistle in field trials. In addition to attacking the thistle crown and...

Bourdot, G.W.; Saville, D.J.; Hurrell, G.A.; Harvey, I.C.; Jong, M.D. de, 2000: Risk analysis of Sclerotinia sclerotiorum for biological control of Cirsium arvense in pasture: Sclerotium survival. The plurivorous ascomycete, Sclerotinia sclerotiorum, is being evaluated as a mycoherbicide for the biocontrol of Cirsium arvense in pastures. Increased inoculum levels potentially add to the risk of disease in susceptible crops sown at or near th...

Hurrell, G.A.; Bourdot, G.W.; Saville, D.J., 2001: Effect of application time on the efficacy of Sclerotinia sclerotiorum as a mycoherbicide for Cirsium arvense control in pasture. An experiment was conducted in sheep-grazed pasture in three regions of New Zealand over three years (from October 1993 to November 1996) to evaluate the effect of application time on the efficacy of a dry granule mycelium-on-wheat formulation of...

Bourdot, G.W.; Hurrell, G.A.; Saville, D.J.; D.J.ng, M.D., 2001: Risk analysis of Sclerotinia sclerotiorum for biological control of Cirsium arvense in pasture: Ascospore dispersal. Natural levels of Sclerotinia sclerotiorum ascsospores in the Canterbury region were determined over 3 years by trapping depositing ascospores in dishes containing a selective agar. Mean levels in 'horticulture', 'biocontrol-pasture...

Bourdot, G.W.; Harvey, I.C.; Hurrell, G.A.; Alexander, R.T., 1993: An experimental mycoherbicide utilizing Sclerotinia sclerotiorum controls pasture populations of Cirsium arvense in Canterbury. In field trials at Templeton, Canterbury, the adventitious shoots of C. arvense in sheep-grazed Lolium perenne/Trifolium repens pastures were treated with a mycelium-on-wheat formulation of S. sclerotiorum in Oct. and/or Nov. 1991. Untreated C. ar...

Harvey, I.C.; Bourdot, G.W.; Saville, D.J.; Sands, D.C., 1998: A comparison of auxotrophic and wild strains of Sclerotinia sclerotiorum used as a mycoherbicide against Californian thistle (Cirsium arvense). Two auxotrophic mutant strains of Sclerotinia sclerotiorum were tested in the greenhouse for pathogenicity on Cirsium arvense with and without amino acid amendments. An arginine auxotrophic mutant, with an amendment of the amino acid, followed an...