Biosecurity, pests, weeds and diseases
CONCLUSIONS This trial has confirmed the field observation that 2,4,5-T whilst giving good initial control of Pennyroyal, fails after a number of years. Round up has a far longer term effect. This can only be attributed to a more complete initial kill as both herbicides are essentially non residual. Further work needs to be conducted on Round up in combination with soil residual chemicals or multiple applications to overcome the problem of reinfestation from seed reserves. 81A1 -01
Moore, J. (1982), Sorrel, Dicamba Soil Residual Effects, Glean, Veldt Grass, Declared weeds Blackberry, Pattersons Curse, Penny Royal. Department of Primary Industries and Regional Development, Western Australia, Perth. Report.