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

Problems with red tip photinia in San Antonio
March 29, 2009 - I have a red tip photinia that's about 20 years old and about 20 feet high--it is big! I noticed last summer the highest leaves looked droopy all the time even with deep watering and now that portion...
view the full question and answer

Native firebush dying in Sun City Center FL
July 17, 2009 - I have a native firebush, it is suddenly dying branch by branch, from the inside out, I have noticed odd things look like wasps but with speckled wings on it. What could be killing it. The inside bra...
view the full question and answer

Problem with unknown tree in Austin, Texas
July 23, 2013 - Have recently moved to Austin, Texas and have a tree in my backyard that has been dropping leaves and one major branch appears to be dead. That branch has hard rust colored sap circles (about penny si...
view the full question and answer

Dieback of river fern and maidenhair fern in the Texas summer
August 28, 2015 - My river fern and maiden hair fern are dying back. I know it is hot, but they are in shade and watered regularly. The river fern is dying back from the tips. Any fungus or bugs I should be looking ...
view the full question and answer

Problems with non-native St. Augustine lawn from Austin
October 06, 2013 - We have St. Augustine in our front lawn. There are some patches where the grass has entirely died but mixed in with the dead areas are little clumps of living grass. It seems to be spreading througho...
view the full question and answer

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