Letter | Published:

Treatment of Hops with Dimefox


DIMEFOX, a systemic insecticide, is extensively used in commercial practice for the control of the hop aphis (Phorodon humuli) and the hop red spider (Tetranychus urticae). Because of toxic hazards it is not used as a spray or dust but is applied via the soil at the rate of approximately 0.5 gm. active ingredient in 120 ml. water per plant or hill. A single application is normally made each season in May or June.

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