Spray oils on dormant trees to kill overwintered aphid eggs. Overwintered larvae remain exposed on the trunk and can be controlled at this time. Remove and destroy damaged tree limbs and canes infested with borer larvae before insects emerge. Larvae feed on older growth of various pines. Overwintered larvae may damage roots of turfgrass.
Clover mites continue and banks grass mites begin to increase in droughty areas.
Tunneling activities and associated lawn lumps continue. Non-biting midges emerge from ponds and mating swarms may be observed over lawns. Swarms of adult insects may be observed and eggs laid in leaves. In forested areas, adult emergence, flights and tree attacks may begin. Overwintered stages on trunk move to twigs and feed.