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

Monday - June 06, 2011

From: Baldwin, NY
Region: Northeast
Topic: Diseases and Disorders
Title: Something killing evergreens on Long Island from Baldwin NY
Answered by: Barbara Medford

QUESTION:

What seems to be killing so many of the evergreens on Long Island - see more and more dying each day - doesn't seem to be a rhyme or reason - can it be helped? Many thanks.

ANSWER:

"Evergreen" is a pretty broad category, but we are betting that in your part of the country, USDA Hardiness Zone 6b, most of your evergreens would fit into the Conifer category. When we searched our Native Plant Database on "trees" and New York we found these conifer families native to New York:

Pinaceae (pine) - includes pines, spruce, and fir

Cupressaceae (cypress) - includes arborvitae, juniper, cedar and bald cypress (which is not evergreen)

Taxaceae (yew)

There are also 3 members of the Ilex (holly) genus that are evergreen, but they don't share the pest problems that the conifers do.

So, you see, we really don't know which evergreens you are asking about, but we do know that we have had inquiries from various parts of the country on diseases affecting conifers, mostly junipers, and Blue Spruce in the Western United States. Most of these, if not all, seem to be related to various species of spider mites. Rather than repeat a lot of material, we are going to link you to some previous Mr. Smarty Plants' answers, all of which have links to sites on the insects involved. We would also suggest you visit the website of the Department of Environmental Conservation, Division of Lands and Forest, New York. Since there are 4 counties on Long Island, and several Baldwins in New York, we are going to take a guess and refer you to the Cornell Cooperative Extension Office for Suffolk County. Even if that is not your county, they will know what you are talking about and hopefully will provide you with some information.

Previous answers on similar questions from Mr. Smarty Plants:

Juniper mites May 27, 2011

Evergreens in New York, October 25, 2008

Arborvitae December 16, 2010

Junipers August 1, 2010

 

 

 

More Diseases and Disorders Questions

Mildew in Phlox paniculata
October 13, 2008 - I planted garden phlox (phlox paniculata) in my front landscaping and it is suffering from mildew. It is wet on that side due to a down spout and it may benefit from being split. Does anyone know of...
view the full question and answer

Peeling bark on red oak in Plano, TX
April 08, 2010 - I have a red oak that was planted 2 years ago. The trunk is approx. 5 in around. The bark around the bottom of the trunk is peeling off. At first we thought it was rabbits so we put some rabbit gua...
view the full question and answer

Tip Dieback on Lonicera sempervirens
August 14, 2013 - I have a Lonicera sempervirens (coral honeysuckle) vine in Virginia which does well early in the season, but then around July, the very tips of its shoots (just the last 1-2 inches) wither, turn black...
view the full question and answer

Problems with Live Oak in Boerne TX
April 24, 2011 - I had my large Live Oak trimmed last year. This spring there seems to be a problem with leaf growth. Most leaves are small in nature and appear to have been attacked possibly by bugs. Many of the bran...
view the full question and answer

Trees failing to prosper from Denham Spring LA
December 23, 2013 - I live in Louisiana. Out of all of the native trees that we grow, there are two in particular that always struggle no matter what the conditions are in which they grow. The first one, sassafras, is ...
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 | STAFF
© 2015 Lady Bird Johnson Wildflower Center