What spruce tree has soft needles?

What spruce tree has soft needles?

Dwarf Alberta Spruce (Picea glauca ‘Conica’) The dwarf Alberta spruce is a unique cultivar of the white spruce, known for its conical shape, soft bright-green needles, and dwarf shrub form.

How to treat needle cast disease of spruce?

Needle cast diseases can be effectively controlled with fungicides containing chlorothalonil. For Rhizosphaera needle cast, two properly-timed applications per year for at least two consecutive years, and sometimes three years, is required for control.

How big are the needles on a dwarf Alberta spruce?

The dwarf Alberta spruce has green needles, 3/4″ (7.5 cm) length, with sharp tips. The needles produce aromatic scent when crushed. The cones are rarely produced. They are cylindrical pale brown and are 2.5″ (6 cm) long with flexible scales.

When do the needles fall off a spruce tree?

The spruce tree is symbolically used in the coat-of-arms of the Finnish town of Kuhmo. Spruce needles fall off when the tree is 4-10 years old. However, the peg-like structures (called sterigmata or pulvini) on the branches are retained, making them rough. The Wright brothers constructed the first aircraft, called Wright Flyer, using spruce wood.

How tall does an Engelmann spruce tree get?

Spruce tree identification You can identify these medium-sized spruce trees by their cylindrical, narrow shape. Engelmann spruces grow to an average of 100 ft. (30 m) tall. The foliage is glaucous bluish-green needles, and pendulous small conical brown cones appear in the dense spruce growth.

How old are the needles on a spruce tree?

Damage typically starts on the lower branches and moves up the tree affecting susceptible spruce trees when 15 to 20 years old. Close inspection using a hand lens will reveal tiny black dots on infected needles—stomata (tiny holes that allow gas exchange) are white on healthy needles.

What causes needle cast on a conifer tree?

Rhizosphaera needle cast is a very significant disease of landscape, nursery and plantation conifers. It is caused by a group of fungi in the genus Rhizosphaera. This disease is found throughout the northern hemisphere.

Why are the needles on my blue spruce tree turning brown?

Spruce trees can show brown needles starting from the lower limbs and progressing up the tree. One common needle disease in Minnesota, Rhizosphaera needle cast, is caused by the fungus Rhizosphaera kalkhoffii. Blue spruce varieties are very susceptible to Rhizosphaera.

When to spray blue spruce for needle cast disease?

Therefore, if you put your first spray on the trees May 15 and a second spray on May 25, we ask you to consider spraying June 15 (four weeks after the first spray) to ensure your coverage is complete.