Tree diseases

What causes a white pine to suddenly turn yellow?

It could be a root problem causing the decline of the one tree. White Pine are susceptible to root rot disease and/or...

What causes black spots and leaf loss in multiple trees?

There are many problems that can cause spotting, curling, and death of the leaves and/or tree. Without more extensive...

What injections are best for a 200–300-year-old live oak?

We recommend fertilizer applications to the soil based on soil analysis results We never recommend stem injections on...

What is the best way to maintain Bradford Pear trees?

I would recommend pruning them to thin the canopies approximately 15% by removing live, rubbing, and interfering...

What is the web-like coating on my Valley Oak’s branches?

This is likely an insect called a leafroller that created the webbing. If this is the case, it has probably completed...

What should be done about a Yoshino Cherry with Shot Hole Disease?

“Shot hole disease” is caused by the fungus blumeriella. Preventative fungicide treatments beginning in the early...

What should be done about tall evergreens that are infected with orange gelatinous globs?

This is one form of the cedar apple rust fungus. Part of its life it lives on cedar trees, or evergreens, and the...

What should I do about a broken plum branch full of fruit?

If the branch is still attached by the cambium, (the "skin" of the trunk), then leave it where it is for the time...

What should I do about ants damaging my maple tree?

Ants only excavate dead wood, so there is little concern the ants will affect the health of the tree. The bigger...

What small trees can I plant near a sidewalk without root damage?

Prior to planting, it is useful to do a soil analysis to determine the soil type, soil nutrient content, and soil pH...