Effect of flupropanate formulations on serrated tussock (Nassella trichotoma (Nees) Arech.) in South Africa and Australia
M.H CampbellA and B.D. ViljoenB
A 56 Green Lane, Orange, New South Wales 2800, Australia.
B Plant Protection Research Institute, Uitenhage 6230, South Africa.
Summary
Identical experiments were carried out in summer and similar experiments in winter, in South Africa and Australia, to investigate the effects of two flupropanate formulations (Frenock® and Taskforce®) on serrated tussock (Nassella trichotoma (Nees) Arech.). Results showed that both formulations were effective in killing the weed at relatively low rates (0.56 to 1.54 kg a.i. ha-1) from summer and winter applications in both countries. At the lower rates applied the herbicides appeared more effective in South Africa than in Australia particularly from the winter application. The failure of the herbicides in one experiment set down in summer in South Africa was attributed to spray deposition on heavy seedhead cover with the seedheads being blown away before the herbicides could be washed to the soil by rain and taken up by the tussock roots.
Plant Protection Quarterly (2006) 21 (1) 2-5.