Avoid establishing dense plantings. Maintain good weed control so that weed growth does not impede air circulation around the lower branches. Avoid planting susceptible trees in low areas or shady areas where humidity and needle wetness tends to be high for prolonged periods. Fungicides can be applied to protect healthy foliage. Note that in order to legally use a fungicide on a tree, the name of the tree must appear on the fungicide product label.
Spots become reddish-brown .
These are easily seen when wet. A magnifying glass is needed to see the individual structures. Favorable environment Free moisture on needles. 53-59 F. Free moisture on the needles Management 1. Plan plant placement and weed control to insure good air circulation to reduce humidity and period of needle wetness.