several shrub questions

Asked May 24, 2016, 9:03 AM EDT

1. I have alberta spruces and other spruces that are brown in the middle and green on the outside. What is causing the brown in the inside and how would I treat it? 2. I have eastern white pines with the tip dying. What is causing this and how do I treat it? 3. I have boxwoods that are partially dying turning yellow and then brown. What is causing this and how do I treat it? 4. I have a Leyland cypress that is slowing turning brown and the trunk looks like that there are carvings with shiny material.What is causing this and how do I treat it? Thanks!

Montgomery County Maryland leyland cypress alberta spruce browning trees eastern white pines yellowing browning boxwoods

1 Response

Alberta spruce - We would like to see photos of the tree and affected branches. This will give us more clues as to why the branches are browning. Please send photos of the whole tree including the site, around the base, and affected branches. Usually alberta spruce is subject to spider mites. The interior of the tree can brown due to lack of sunlight and this can be normal. http://extension.umd.edu/sites/default/files/_images/programs/hgic/Publications/HG13%20Spider%20Mite...

White Pine - Send us photos of the whole tree, the tips, and any affected branches so we can see what you may be dealing with. Send us photos in a separate question. http://extension.umd.edu/sites/default/files/_images/programs/hgic/Publications/HG54_IPM_Series_Pine... Boxwood - there could be several reasons for yellowing and browning of the foliage. In a separate question Send us photos of the whole shrub, around the base, and affected foliage. http://extension.umd.edu/sites/default/files/_images/programs/hgic/Publications/HG52_IPM_Boxwood.pdf

Leyland cypress - there may be several reasons for decline. There are several lnsect (bagworms) and disease issues (seridium canker) that can impact Leyland Cypress when stressed due to poor site conditions, drought, poorly drained soils, etc. They are not that winter hardy here during cold winters. Send us photos in a separate question of the whole tree, around the base, and affected foliage so we can see what you may be dealing with.
mh