En EspaŅol

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
Can't find the answer in our existing FAQs, submit a question to Mr. Smarty Plants.
Need help with plant identification, visit the plant identification page.
 
rate this answer
Not Yet Rated

Thursday - October 08, 2009

From: Peterborough, ON
Region: Canada
Topic: Pests, Shrubs
Title: Viburnum insect damage
Answered by: Anne Bossart

QUESTION:

I have a highbush cranberry that gets covered in 1/4in black bugs every spring. It makes lots of holes in the leaves. What are they and how can I get rid of this insect.I have tried neem oil but it doesn't work great?

ANSWER:

It is likely that your problem is due to the Viburnum Leaf Beetle. It was was introduced from Europe and was first discovered in North America in the Ottawa/Hull area on the European Highbush Cranberry, Viburnum opulus.  It has since moved into the native viburnum population and can kill a plant after a few successive years of defoliation.

You don't mention how mature your plant is or for how many years you have been experiencing the problem.  Is it possible that your plant is actually not the native?  I lived near Ottawa for a few years and was conscious of the fact that one very large "snowball bush" had a problem every spring but the natives which were growing out in the fields and forest edges did not. Since then I have noticed that young plants are more susceptible and perhaps mistakenly assumed that the non-native had been subsitituted for the native.  If your plant is mature and it never berried, you can assume that it is the European plant.

You will find the following links helpful: The Cornell Univeristy Entemology website has information about the pest (and pohtos)  and the Connecticut Agricultural Experiment Station website has a list of relative susceptibility of different viburnums.

 

 

More Pests Questions

Topical treatment for poison ivy rash
November 12, 2008 - I would like to know a topical treatment for the poison ivy rash
view the full question and answer

Possible freeze damage in Wax Myrtle from last winter in Bastrop, TX
July 25, 2011 - Our Wax Myrtle is about 7 yrs old and in good shape until this past winter when we had several very hard freezes. Now several of the large branches are dead and more are dying each month. We have not ...
view the full question and answer

Growths on Shumard Red Oak leaves from Katy TX
April 01, 2013 - Our beautiful Shumard Red Oak has developed lots of light green grape like growths on the leaves. Please inform us what this could be and how we should treat it?
view the full question and answer

Control of grasshoppers from Goldthwaite TX
July 07, 2012 - How long do grasshoppers live. They are eating our flowers, plants and trees.
view the full question and answer

Aluminum foil disorienting insects under plants from Brierfield AL
April 20, 2011 - Does covering the ground under plants frequently attacked by flea beetles with aluminum foil really disorient the insects? But does it also disorient beneficial insects?
view the full question and answer

Smarty Plants's Facebook profile Support the Wildflower Center by Donating Online or Becoming a Member today.

Mr. Smarty Plants wants you to be his Facebook friend. Click the Facebook icon to add yourself to Mr. Smarty Plants list of friends.
E-NEWSLETTER | BECOME A MEMBER | DONATE NOW | MEDIA | SITEMAP
© 2014 Lady Bird Johnson Wildflower Center