Cercospora blight symptoms occur in early summer with the oldest needles on the lower branch turning yellow and dropping. Phomopsis and Kabatina blight affect shoot tips so the tips of the plants turn reddish-brown. Kabatina symptoms occur on new growth in the spring, Phomopsis symptoms can occur at any time during the growing season. Mancozeb is the only fungicide recommended for kabatina tip blight. Infected needles may remain attached for several years.
Symptoms begin in midsummer with foliage yellowing the browning.
Tree usually dies before spring. Vector is a Cerambycid beetle - remove and burn infested trees before May 1. Dead and dying branches should be removed to reduce attraction. Symptoms occur in midsummer with the needle turning yellow then purplish-brown in late winter. Small black fruiting bodies emerge from stomates in the spring.