Michigan State University Extension
Ornamental Plants plus Version 2.0 - 00001123
01/01/98
Tip blight caused by Diplodia pinea is common on Austrian Pine. The new growth turns brown and the branch is stunted. Black fruiting bodies may be found on needle bases within the sheath.
Canker diseases may rarely cause dieback of landscape pines. Keep trees healthy and prune out the infected branches.
Needle cast is common on small trees and plantation or forest trees. Infected needles yellow and fall off.
Needle blight caused by Dothistroma pini infects Austrian Pine. Dark, slightly swollen bands form on one year old needles in late summer. The part of the needles beyond the band dies. Severely infected trees look thin.
White pine blister rust attacks White Pine and uses currant as an alternate host. European Black Currant, the favored alternate host, may be banned from certain areas. Other currants, particularly Red Currant should not be grown within 300 feet of pines. Infected branches may be pruned off.
The needles droop if the roots can not supply adequate amounts of water.
White and other pines may be injured by salt if growing near roads. Austrian Pine is the most salt tolerant pine. Pines with roots growing in drain fields receiving softened water may be injured.