Rent Shop Volunteer Join

Q. Who is Mr. Smarty Plants?

A: There are those who suspect Wildflower Center volunteers are the culpable and capable culprits. Yet, others think staff members play some, albeit small, role. You can torture us with your plant questions, but we will never reveal the Green Guru's secret identity.

Help us grow by giving to the Plant Database Fund or by becoming a member

Did you know you can access the Native Plant Information Network with your web-enabled smartphone?

Share

Ask Mr. Smarty Plants

Ask Mr. Smarty Plants is a free service provided by the staff and volunteers at the Lady Bird Johnson Wildflower Center.

Search Smarty Plants
See a list of all Smarty Plants questions

Please forgive us, but Mr. Smarty Plants has been overwhelmed by a flood of mail and must take a break for awhile to catch up. We hope to be accepting new questions again soon. Thank you!

Need help with plant identification, visit the plant identification page.

 
rate this answer
Not Yet Rated

Saturday - July 26, 2008

From: Kaysville, UT
Region: Rocky Mountain
Topic: Non-Natives, Diseases and Disorders, Pests, Trees
Title: Loss of leaves from globe willows in Utah
Answered by: Barbara Medford

QUESTION:

I have four globe willows that have been in my back yard for the past 6 years. For the past month they have been losing their leaves from the bottom up. We had aphids in some of our other trees and were sprayed as well as the globe willows, however, the willows are still losing their leaves. Any suggestions as to why this is happening?

ANSWER:

Salix matsudana, globe willow, is a native of eastern Asia. Willows generally are fairly weak, short-lived trees, susceptible to many insects and diseases, as well as dropping a lot of litter. The globe willow is often infected with slime flux, a bacterial disease that is soil-borne. They are frequently found in the Rocky Mountain area, in warm valleys, so while they are not native to North America, they are at least well adapted to the area in which you live.

This Colorado State University Extension The Globe Willow has excellent information on the care and problems facing this tree. Be sure and follow the links from the home page to see "Introduction," "Diseases and Insects," and "Aphids." In the last one, on aphids, follow the link to images of the giant willow aphid. If we saw something that big coming for us, we would probably drop some leaves, too. On that same webpage, there is some excellent advice: Always check with the Extension office in your county or state for specifics on pesticide selections and use. The website for your Davis County Extension office is apparently still under construction, but you can contact them at 28 E. South St., Farmington, UT 84025, phone 801-451-3412.

 

 

More Diseases and Disorders Questions

Oak bark problems from Stillwater OK
May 14, 2012 - In my clients large oak tree there is bark stripped from the limbs in small pieces. No piece is larger than 1 inch by 1 inch and occurs on limbs high in the canopy. It does not look like squirrel doin...
view the full question and answer

Mexican Lime Turning Yellow
March 25, 2015 - What causes moderate yellowing of 40% of the leaves of an 8 year old Mexican Lime Tree that is booming and blooming right now with lots of thick new growth? I used a general garden fertilizer a few ...
view the full question and answer

Need help for diseased Cherry Laurel tree in Houston
October 19, 2015 - A couple of weeks ago the leaves on my decade old cherry laurel began to turn brown. Now they are entirely brown. I have not changed the way in which I cared for it, but about three days ago I noticed...
view the full question and answer

Problem with non-native Houttuynia cordata (chameleon)
January 30, 2012 - I have a Houttuynia cordata chameleon plant in a clay pot. My zone is 9b and my yard is partial sun. Up until January, it was thriving. Now, it is dead. I think the cold killed it. I kept it moist at ...
view the full question and answer

Black rot at center of Agave from Clovis CA
May 12, 2013 - We have some beautiful variegated "Green & Cream" Agave plants in our cactus garden. One in particular has done quite well for several years and is the largest, about 18" tall & across, it has neve...
view the full question and answer

Support the Wildflower Center by Donating Online or Becoming a Member today.