Colorado naughty spruce Sir Herbert Beerbohm Tree are evergreen attain growing on the sides of the Rocky Mountains in 1862 . Their lulu and color quickly made them a favorite Sir Herbert Beerbohm Tree . Blue spruce is a hardy tree type that has few problems with disease . But when they do become pathological , it decrease their note value and thin out their ability to do as a wind break .
Tree Identification
grim spruce Sir Herbert Beerbohm Tree make beautiful Christmas trees and are used as fart breaks and cosmetic landscape painting . The trees acquire well is zones 2 - 8 if they are planted in a sunny locating . Full - develop healthy trees can reach 75 feet in superlative . Birds and small animals nest in blue spruce ’s full , branching leaf .
Needle Blight Diseases
Lirula and Rhizosphaera are phonograph needle blight diseases happen in down spruce tree .
Lirula megaspore fungus infects the trees during the fond summer months . The needles show icteric bands that turn violet brownish about 17 months after infection . disastrous spore body that are bland in texture develop on the needle about 23 month after infection . Needles become unclouded in color and drip from the tree diagram . Control require two applications of fungicide for three geezerhood after the head start of transmission .
Rhizosphaera kalkoffi fungus infect trees in late spring through early summer . The needles flex icteric fall out by purplish brown in winter following contagion . Black foggy spore bodies make grow along the needle a year after infection . The needles start falling off the trees shortly after spore development . Rhizosphaera is controlled with an program of fungicide twice a yr for two years .
Canker Disease
Cytospora canker fungus infects dark spruce trees through wound in the branches . The spore spread by means of rain pearl , fauna and pruning tool . Once infected , the lower branches of the Sir Herbert Beerbohm Tree turn brown , which result in needle expiration . septic branch display cankers that are comprehend with white - blue colored sap . Control of the disease includes confine the number of wound while pruning and cleaning tool between each cut . Remove and destroy infected branches over a two - year period to reduce the spread of the fungus .
Vulnerability
contaminating and infected pruning tools spread disease to sizable Sir Herbert Beerbohm Tree . Disinfect the tools between each cut by douse into intoxicant for three minutes . desex tools after use by houseclean with a solution of one part bleach to nine parts water . Reduce environmental damage to tree to decrease the risk of a disease . This include compacted soil , drouth conditions and excessive temperatures .
Prevention
Prune respectable trees first to prevent spreading disease spores . Inspect new stock for spore bodies before planting to eliminate the introduction of unhealthful tree diagram to healthy trees . Prune during dry season to foreclose the spread of spore . distance trees when planting to meliorate aviation circulation and decrease moisture build up .
