Hoopsi Blue Spruce Disease

This tree never suffers any winter damage it is free of important pests or diseases and even deer leave it alone. Spider mite invasions can cause significant problems with new growth and overall tree health. Needlecasts tip blights and canker diseases.

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Blue spruce is very susceptible as are black engelmann red sitka and white spruces.

Hoopsi blue spruce disease. Watch for aphids particularly spruce gall aphids scale budworms and bagworms. All of these diseases are caused by fungal pathogens and each produce specific symptoms that can be useful in diagnosing the problem. Blue white red black engelmann and norway spruces are all susceptible to this disease. Piceae is the most prevalent and destructive fungal disease of norway and colorado blue spruce.

Susceptibility varies widely among species but generally trees under stress or growing outside their natural range are more prone to the disease. Hoop s blue spruce picea pungens hoopsii sku 6471. Symptoms the disease is usually first evident on lower branches and then works upward gradually. Pyramidal form that holds stiff horizontal branches with dense silvery blue needles.

New growth is especially bright blue. A blight caused by fungus like spores is hitting the local blue spruce tree and there is no way to cure the tree once it has been hit said scott sjolander a penn state extension office urban. Destroy heavily infected trees. Susceptible to needle cast canker and rust.

The former is an infectious needle disease caused by the fungus rhizosphaera. Occasionally cytospora canker is found on douglas fir hemlock and larch. Blue spruce trees are susceptible to an infectious needle disease caused by the fungus rhizosphaera. Year old needles are cast after turning rust colored in the spring.

The disease referred to as rhizosphaera needle cast is the most common problem seen on blue spruce samples that are submitted to the plant disease clinic. Outstanding evergreen tree generally considered the bluest form. The appearance of small black spots premature needle loss and a thinning canopy can be signs of rhizosphaera needle cast. White spruce are classified as intermediate in susceptibility to the disease and norway spruce are relatively resistant.

Common blue spruce diseases common pine tree diseases include rhizosphaera needle cast and cytospora canker fungus. Partial to full sun. The infectious fungal disease starts near the base of the tree and spreads. There are not many trees that will grow in the coldest parts of the country which makes the hoopsii blue spruce very useful for gardeners in zones 2 to 5 where hardy trees are needed.

There are three principle types of diseases that affect blue spruce trees. Cytospora canker caused by the fungus cytospora kunzei also known as valsa kunzei var. No serious insect or disease problem.