Several disease affecting an Alberta spruce and other species of spruce can be prevent by advance an optimal grow environment for the tree . This typically means refraining from watering the phonograph needle of the tree , keeping them as dry as possible , and take into account for maximal spacing for tune circulation .

Rhizosphaera Needle Cast

An Alberta spruce that is turning dark-brown may be infected by Rhizosphaera acerate leaf mould , a disease because of the fungus Rhizosphaera kalkhoffii . Needles typically become a purplish - chocolate-brown colour in the second year of infection and may fall from the tree diagram . The disease get on the down in the mouth branches and gradually works its way up and around the spruce . In addition to pruning and withdraw fall needles and twig that entertain the disease , copper - base antimycotic agent are effective in controlling needle cast disease .

Lirula Needle Blight

Lirula needle blight , a product of the fungus Lirula macrospora , involve several geezerhood to complete its life cycle , with the fungus overwintering on the needle of the tree . During their 2nd year of infection , normally in tardy summer , spruce needles begin to take on a yellow or chocolate-brown color . As the needles age and carry on to release fungal spore , they turn a grayish - chocolate-brown shade and remain committed to the tree diagram for several years .

Spruce Needle Rust

Spruce phonograph needle rust fungus is because of several different fungal species and ab initio turn the peak of needle yellow . In slip of knockout infection , the Alberta spruce may take on a brown , tan or pinkish colour . The disease is keep company by the dispersion of fungous spore that are so legion and vivid they may cake palisade botany with an orange film and even discolor nearby physical structure of piss . The impairment from spruce needle rusting is chiefly cosmetic and rarely kill the tree .

Armillaria Root Rot

Armillaria root bunk , a product of the fungus Armillaria , results in the needle of an Alberta spruce turn over brownness , but this is a small concern when compare to the damage that the root hogwash is capable of . enroll the tree diagram through the root system , the roots lead off to decay and are unable to draw sufficient water and nutrient from the world . As a result , the entire tree is deprived and needles , along with ramification , eventually die and return by . The disease may belt down the entire spruce .

Other Fungi

Stigmina lautii is commonly called Stigmina needle cast disease and causes a yellowing and toasting of former needle of the Sir Herbert Beerbohm Tree , followed by the gross defoliation of branches by the end of summer . It boasts spore - facts of life heart and soul that come out hairy or feathery . This fungus is typically accompanied by a separate fungus , Setomelanomma holmii , that attacks the twigs ofthe spruce . It is ordinarily referred to as spruce phonograph needle drop .

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