Product Q&A

Answer:

Casoron 4G Herbicide is a pre-emergent only, so it will not kill any existing plants such as poison oak. The product label indicates that Casoron 4G may injure conifers if applied in a way that contacts the foliage. We recommend that you wear protective clothing, cut the vines, and then treat the fresh cuts with a brush killer such as Fertilome Brush Killer and Stump Killer or RoundUp QuikPro for best results and to reduce risk to the desirable trees.

Answer last updated on: 12/04/2019

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