Comparative doseresponses of five pasture weeds to a <i>Sclerotinia sclerotiorum</i> mycoherbicide


  • G.W. Bourd?t
  • G.A. Hurrell
  • D.J. Saville



A gel preparation of mycelia of the plant pathogen Sclerotinia sclerotiorum was applied to the pasture weeds Carduus nutans L Carduus tenuiflorus L Cirsium arvense (L) Scop Jacobaea vulgaris L and Ranunculus acris L Doses ranging from 0 to 1000 l gel/plant were applied as 10 or 50 l droplets one per leaf axil Statistically significant responses to dose were evident in C arvense J vulgaris and R acris leading to 90 74 and 100 reductions in living tissue respectively at 200 l/plant compared to the control 29 days after treatment For C nutans and C tenuiflorus where even low doses gave good control the reductions (averaged over all doses) were 98 and 88 respectively indicating that these two annual thistles were exceptionally susceptible to this S sclerotiorum formulation For C nutans 1 litre of the gel would if precision applied be sufficient to control at least 20000 plants suggesting broadacre use may be commercially viable




How to Cite

Bourd?t, G., Hurrell, G., & Saville, D. (2011). Comparative doseresponses of five pasture weeds to a <i>Sclerotinia sclerotiorum</i> mycoherbicide. New Zealand Plant Protection, 64, 81-85.




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