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. and Saville, D. 2011. Comparative doseresponses of five pasture weeds to a &lt;i&gt;Sclerotinia sclerotiorum&lt;/i&gt; mycoherbicide. New Zealand Plant Protection. 64, (Jan. 2011), 81–85. DOI:




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