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Hyssop loosestrife (Lythrum hyssopifolia) is a widely distributed weed in the south west of Western Australia.
'Crop-topping' is the late application of herbicides to prevent weed seed-set.
Spray-topping is a very effective method for managing annual grass seed set in pastures.
Two control timings were investigated to control weeds in fencelines, once early in the year with a good residual and a knockdown, followed by another one later in the season (after the seeding and
