Yellowheaded Sawfly

Adult yellowheaded sawflies are stingless wasps, measuring at about 1/3 inches long. They are a defoliator of spruce trees throughout our region.

Detection & Treatment

The yellowheaded sawfly will, in time, strip spruce trees of their needles. Early detection includes the top needles of the tree turning a reddish-brown color. There are a handful of methods for treatment, including pruning the crowns of infested trees as well as chemical treatment.

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