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Sue from Warrenton writes

Does the active ingredient dichlobenil only act as a preemergent?

There's another product by Lilly Miller with the same ingredient that's sold as a vegetation killer at 2% and I've used it as a vegetation killer in the past, so I'm a bit confused.

Answer:

Casoron 4G is a preemergence herbicide that kills selective weeds and grasses. Casoron 4G controls weeds before they emerge from the ground, by forming an herbicidal vapor barrier in the upper layer of the soil when activated by rainfall or irrigation water. Casoron 4G should be applied before weed seed germination and emergence from the soil (usually from mid-winter to early spring). What product do you see that works as a post emergent?

Answer last updated on: 05/08/2014

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