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John from Maryland writes,

Is a surfactant recommended for basal bark treatment of hemlock woolly adelgid?

10-70 cm dbh hemlocks. The larger ones have very woody bark.


Per the product label, you can mix Safari 20SG with a surfactant, but it may not be very helpful for woolly adelgids in particular since they are mostly controlled by ingesting the active ingredient rather than by contact:

Tank mixing with a surfactant may improve control of pests such as whitefly, mealybug and scale. Confirm plant safety of tank mix in small area before using on a commercial scale.

Answer last updated on: 08/24/2014

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