Wednesday, June 22, 2016

London Planetree Shedding Bark



The shedding of bark is normal for the London Planetree  (Platanus x aceriflolia).

Winter Damage/Decline on a Honeylocust Tree


Winter Damage/Decline on a Honeylocust Tree. Observing the decline of this Honeylocust tree I see that more than half of the tree failed to ever leaf out in the spring. This indicates winter damage. During a warm spell in the winter months this tree started to send up water and nutrients. When the next freeze occurred the water inside the tree freezes and expands killing the tree tissue.

Decline in 1 out of 4 Austrian Pines


Decline in 1 out of 4 Austrian Pines. At first glance it may appear to be pine wilt. Pine wilt kills a pine tree completely in the fall. With closer observation I see that this pine still has green/live growth. The steady decline over several years of one out of four of these pines is likely due to this Austrian Pine being planted too deep.

Rust and Wooly Aphid Damage on Ash Tree Leaves



Saturday, May 28, 2016

Herbicide Drift

Herbicide drift on a Redbud tree, Cercis canadensis. On the right I am holding a leaf that has escaped the herbicide damage. The distorted leaves in the background with wavy edges show herbicide injury.
Herbicide injury on Spreading Euonymus, Euonymus kiautschovicus. I am holding a leaf without herbicide injury.

These Tulip Tree (Liriiodendron) leaves show herbicide damage with yellow spots and distortion of the leaves.

Anthracnose on sycamore

A number of fungi cause anthracnose which can affect several tree species in Kansas. On this sycamore you see the brown irregular spots along the leaf veins. This disease occurs in cooler weather and when the temperatures increase these leaves will drop. This is mainly a cosmetic problem unless too many leaves are affected and drop. This can cause extra stress for the tree making the tree more susceptible to other diseases and/or insect damage. 

Ash gall mite


Rose mosaic virus



Bacterial leaf spot on ivy


Fescue endophyte