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Gene from Houston, Tx writes

Should Merit 2F Insecticide be applied as a root soak or as spray?

Have whitefly infestation on 25- 5ft Viburnums.

Answer:

Merit 2F Insecticide should be applied as a systemic soil drench. You could spray Bifen IT at 1 fl oz per gallon monthly to foliage.  Please take a few moments to review our treatment article that offers more helpful tips.   White Fly Control Article

Answer last updated on: 05/22/2018

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