Manage Lophodermium needle cast by applying a preventative fungicide in late summer through fall. Do not prune in wet weather and remove any fallen needles. The disease seldom kills trees but can cause significant defoliation on 2- and 3-year-old needles with current year needles also being infected. Most damaging on low branches and small trees. The disease causes brown needle spots, needle browning, and needle drop. To manage Dothistroma needle blight, apply a protective fungicide in mid-spring and again 4 to 6 weeks later. Brown-spot needle blight is a disease that kills foliage and slows growth in pine. These appear in midsummer or fall, and later may turn brown. ![]() If the problem is severe, reapply until late fall. The first symptom is scattered spots, varying in color from yellow to red. Manage Cyclaneusma needle cast by applying a protective fungicide 3 times in early spring through mid-summer. Do not prune trees during wet weather and sterilize pruning tools between cuts. To manage brown spot needle blight, apply a protective fungicide in early spring. This disease causes premature defoliation in the summer following infection. ![]() In late summer to early fall, black, football-shaped fruiting bodies form on needles. Lophodermium needle cast appears in late fall to early spring as brown spots with yellow margins on young needles. Young trees can be severely stunted and die. There’s an obvious cut-off line between the infected tissue and the needle base, which stays green at the needle base. The spots turn brown then reddish-brown and continue up to the tips of the needles. Premature defoliation occurs.ĭothistroma needle blight causes yellow to tan spots in the fall. Off-white fruiting bodies form on needles and spores are released in wet weather. Spots emerge, killing most of the needle and causing premature defoliation the following summer.Ĭyclaneusma needle cast symptoms usually appear in late summer or fall as light green to yellow spots on infected 2-year old or older needles. Biology & Symptoms:īrown spot needle blight causes straw-colored to light brown spots on needles in late summer or early fall. Early symptoms consist of yellow and tan spots that may be bordered by. Hosts:īrown spot needle blight is common on longleaf pines in the southeastern United States and Scots pines in the Central Plains and Great Lakes regions.Ĭyclaneusma needle cast mainly affects Scots pines but also can infect other pine species such as Austrian pines and Eastern white pine.ĭothistroma needle blight affects Austrian, lodgepole, Monterey, and Ponderosa pines. SIGNS OF ATTACK: The most common symptom is dead needles of seedlings and small saplings. Although needles are infected in the spring, the symptoms do not develop until the fall. The article includes a link to a survey to report infected pines.Needle Blight & Cast of Pines Description:īrown spot needle blight, Cyclaneusma needle cast, Dothistroma needle blight, and Lophodermium needle cast are common fungal diseases that attack pine needles, causing spots, blights, and premature defoliation. ![]() However, such damage generally only happens when a tree is exposed to the blight for repeated years. Of the three pathogens, brown spot needle blight is the only one that can cause consequential damage to trees' health. The State Needs Your Help With Brown Spot Needle Blightįorestry experts have determined that a needle blight is at least partly to blame for an issue affecting thousands of acres of pine trees in south Arkansas, the latest area to confirm the disease that has swept through woodlands across much of the South in recent years.īrown spot needle blight, a fungal disease that causes needles to drop from pines and can stunt the growth of and even kill trees, is one of three different pathogens that researchers have detected in Arkansas, according to Joe Fox, who retired from his 11-year tenure as state forester at the end of June.
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