Explore Plants

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
    
 

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

Friday - November 20, 2009

From: Gilbertsville, PA
Region: Mid-Atlantic
Topic: Non-Natives
Title: Problems with non-native nectarine in Gilbertsville PA
Answered by: Barbara Medford

QUESTION:

I live in southeastern Pennsylvania. I have a mature nectarine tree maybe 14 years old. It has a greenish grey spotting on the trunk and branches, the fruit always turns into the brown mummies and for many years has had leaf curl. I used a product called Serenade biofungicide and this year there was no curl but all fruits were mummies. Is it worth trying to save this tree? What would help it if I prefer not to spray chemicals that would be toxic to birds, critters, water supply. Thanks!

ANSWER:

The Lady Bird Johnson Wildflower Center is dedicated to the growth, propagation and preservation of plants native not only to North America but to the area in which they are being grown. Prunus persica var. nucipersica is native not to Persia (now Iran), as the name implies, but to Central and southern Asia, specifically China. Apparently most of the nectarines, which is really just a smooth peach, sold commercially are grown in California. They are considered hardy to USDA Hardiness Zones 5 to 8. Montgomery County, PA appears to be in Zone 6, so the temperatures should not be a factor. The peach and nectarine are very susceptible to a number of serious disease problems, including peach leaf curl, brown rot, bacterial leaf spot and canker. Since it is non-native and therefore out of our range of expertise, we suggest you contact the Penn State Cooperative Extension Office for Montgomery County to see if they have any suggestions for treatment. 

 

More Non-Natives Questions

Invasive, non-native Bryophyllum spp. in Austin
May 13, 2010 - I was given two varieties of what I now believe are 'Mother of Millions' and saw that they're considered a noxious weed in Australia. Are these plants considered dangerous to TX if I keep them in ...
view the full question and answer

Source for nitrates and phosphorus (P205) for lawn care
July 04, 2008 - I recently supplied soil samples from my back yard to my local extension here in Austin. I have a hybrid Bermuda turf grass (TIF 419) that has had its share of ups and downs, and wanted to assess the ...
view the full question and answer

Non-blooming crape myrtle in Italy, TX
June 25, 2008 - It's Italy, TX, again! Thanks for the advice and links, and I'll study those..but here's where I'm stumped on crape myrtle. I have two (almost) trees because they've been planted over 15 years ...
view the full question and answer

Plant identification for shrub in Florida
September 03, 2011 - On our street we have ornamental shrub planted in the median that has small waxy green leaves, produces small fragrant white flowers, and red berries with white pulp and small seeds on the inside. Th...
view the full question and answer

Problems with non-native Eugenia in Scottsdale AZ
June 02, 2012 - I have 5 eugenia topiaries in my courtyard in pots..I notice as the days here in Phoenix get hotter and dry (as usual) they are starting to look bad, even though they are under a shelter out of the di...
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.