OAK Decline Spreading Mid Atlantic and Southeast!

OAK Anthracnose (fungal) and OAK bacterial leaf scorch – Key POINTS!

Anthracnose is a fungal pathogen

o Typical in wet cool weather = Springtime disease

o Symptoms evident throughout growing season

o Symptoms include:

§

Scattered leaf canopy loss

§ Small brown spots and irregular dead areas with DISTORTED leaves – this is a key indicator

§ Not much leaf drop – dead leaves tend to stay on tree till late Autumn

Treatment Options

§ Increase the trees’ immune response

§ Supplemental water during dry/hot periods

§ Increase quality of soil environment

Oak Bacterial leaf scorch

o Causes are insects transmitting bacterium

o Symptoms appearing later in summer through fall – more severe in dry summers

§ Scattered yellowing and browning of leaf margins throughout canopy

§ Tip dieback with no leave at halo of canopy crown

§ Leaves remain attached through Autumn (not much leaf drop)

§ Starts as a scorching around the edges

§ Will sometimes see a yellow halo around the browning edge

o Can last 3 – 10 years

o Reported on Pin, white, and red oaks


pics include from Better Nature, Iowa State Extension, UMass, Missouri Botanical Gardens, and the Pacific Northwest Handbook.

10 views

Recent Posts

See All

Contact

865-518-9052

More INFO and DIY videos via youtube include:

1.  https://youtu.be/8BM1_9tkyso - Protecting Roots from Construction Damage

2.  https://youtu.be/lZGEstTCczI - Micronutrient Fertilization is Part of Total Plant Recovery

3.  Smart pest management means when, what, and how to apply insecticides to save pollinators!

https://youtu.be/iw1NXEdw0F0

©2018 by Critical Writing. Proudly created with Wix.com