Pine tree needle diseases are do by fungal pathogen . The contagion results in the defoliation and discoloration of conifer needles . Both reduce the tree ’s overall health . other recognition and removal of infected areas is the full method of controller . Highly susceptible conifer tree mintage in high - risk environments , such as Scotch pine tree growing in moist , shady area , may profit from prophylactic fungicide treatments .

Lophodermium Needle Cast

Lophodermium Needle Cast disease , triggered by the fungi Lophodermium seditiosum , affects Austrian , red and Scotch true pine tree mintage . This pine needle disease is name by small browned spots with yellow annulus occurring in late drop . Eventually , the needles turn , dark-brown and settle off , leaving the pine tree diagram with thin tufts of gullible acerate leaf . This fungus . spread from tree to tree by the nothingness , can taint large quantities of trees .

Brown Spot Needle Blight

Scotch , Austrian , Virginia , red and easterly white pine Sir Herbert Beerbohm Tree mintage are susceptible to Brown Spot Needle Blight , an transmission make by the fungi Mycosphaerella dearnessii . Small opprobrious spot occur on the needles during late summer , finally turning brown and falling off in late crepuscle and early spring . This fungi spreads quickly in quick , crocked clime and can efficaciously defoliate a smaller pine tree in two to three seasons .

Naemacyclus Needle Cast

due to the fungi Cyclaneusma subtraction , Naemacyclus Needle Cast normally infects ashen , Scotch , Virginia , Austrian and Mugo true pine tree species . This disease is identified by light unripe smudge occurring on sure-enough needles in late fall . As the disease shape up , the needles sprain yellow , then brown and , ultimately , settle off . Unlike other pine tree phonograph needle diseases , Naemacyclus has no essence on first - year needle .

Diseased Pine Trees

Needle blight , do by various fungi , cause the backsheesh to die back and can turn needle tan or pink . keep up right ethnical maintenance and prune the tree ’s canopy to heighten air circulation , because these fungi prefer wet and high humidness . Mushrooms at the base of the tree are diagnostic of genus Armillaria . finally , the pine tree may die . Healthy trees can recover on their own . Cankers are sunken , dead areas on stem turn or branches that may have raise margins of callused tissue . needle may yellow or turn dark-brown . antifungal agent may generally be reapplied every seven to 10 days . Prune away heavily infected field , especially if the telltale orangish masses are present , and dispose of the thinning away from the yard . forest decay fungi enter the pine Sir Herbert Beerbohm Tree through wound , airborne spore or via tiresome dirt ball activity .

References

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