What's your question? Ask

Poplar Trees

Q.Paskapoo poplar – leaf colour/slime flux

Zone T3A4C3 | Anonymous added on July 28, 2019 | Answered

We have a 12ft paskapoo poplar that is showing signs of stress and I need some advice on what to do. It has had slime flux for at least 4 years and an (uncertified) arborist told us to stop watering it to slow down the seepage. For about the same length of time, by about mid July the leaves start turning yellow the black splotches start forming. It is infested with aphids which I try to hose off every couple of weeks or so

A.Answers to this queston: Add Answer
Downtoearthdigs
Answered on July 29, 2019

This is definitely infected with a fungal infection. This could be caused by the aphids, or can be why the aphids are there now. You can try adding wettable sulfur and dolomitic lime to the soil around the tree. This can help kill off the infection while keeping the soil pH stable.

I would definitely hold off on any watering, unless it remains dry and the soil is completely dry down to about 2 inches. Overwatering will cause an infection very quickly.

As for the insects... This collection of articles will give you ways to control these along with other useful tips: https://www.gardeningknowhow.com/special/organic

Was this answer useful?
00

Log in or sign up to help answer this question.

Did you find this helpful? Share it with your friends!

You must be logged into your account to answer a question.

If you don't have an account sign up for an account now.

Looking for more?
here are more questions about...
Poplar Trees
Join Us - Sign up to get all the latest gardening tips!

Do you know a lot about gardening?
Become a GKH Gardening Expert

OK