Peach Leaf Curl and the Damage It Can Do to Your Peach Trees!

Updated on April 24, 2019
Casey White profile image

Dorothy is a Master Gardener, former newspaper reporter, and the author of several books. Michael is a landscape/nature photographer in NM.

This Is How Your Peaches Should Look

A healthy peach tree will reward you with lots of delicious fruit.
A healthy peach tree will reward you with lots of delicious fruit.

Recognizing Peach Leaf Curl

  • You are not going to have to be a rocket scientist for this one. Peach leaf curl targets only peach and nectarine trees, and it is pretty easy to spot. It is, by far, one of the worst diseases your peach tree could have, and it usually occurs in the springtime when the weather is cool and wet.
  • New peach leaves will be very thick (abnormally so) and, as they grow, they begin to curl and have a "puckered" look to them. On the leaves, you will find blisters that will later turn white. The blisters will usually start out as yellow or reddish. Later, the whole leaf can turn different colors while at the same time developing a whitish covering.
  • In early summertime, those already-ugly leaves will get even uglier, as they turn black, shrivel up completely and fall. Sometimes, after the infected leaves fall, another crop of leaves can form on the tree, but trees that are infected are weak and produce fruit (if you get any) that will be misshapen and covered with lesions in varying shapes.
  • This fruit will drop before it ripens and several years of the disease will make your peach tree severely weak with a reduction in the amount of fruit you are able to find usable. Usually, the tree won't die, but you may wish it would.

This is the beginning of a very nasty fungus on peach leaves.
This is the beginning of a very nasty fungus on peach leaves.

Named the May 2018 "Disease of the Month"

In order for a plant disease to be named "Disease of the Month" it must be of great concern to a lot of people. Peach leaf curl has/had the distinction in May 2018 of having that title, bestowed by the Pennsylvania State University's College of Agricultural Sciences, reporting on its website that this disease was the one that was frustrating people the most.

Spores that are produced on the surface of the leaf as the leaf matures will give the leaf a dusty appearance. The fruit can be infected and will either drop prematurely or be distorted on the surface.

The spores are able to overwinter in bark crevices and around the peach buds and the primary infection occurs from the time the buds swell until the first leaves completely emerge. Any occurrence of rain will wash the spores into the buds. The primary infection can occur during long periods of cool weather (50-70 degrees Fahrenheit), or wet weather (greater than 95% humidity), both creating conditions that are ideal for the infection. Chances of infection are minimal, however, when the temperature is below 45 degrees Fahrenheit. Luckily, infections are rarely established if warm temperatures follow bud swell and rapid leaf development, even in the case of rain.

This is a disease that says "Hello, I'm here!" and can be spotted easily from 20 yards while in a moving vehicle.

— Kari A. Peter, Ph.D. Assistant Professor, Tree Fruit Pathology, Pennsylvania State University

Peach Leaf Curl at Its Worst

...but this is how bad it can get.
...but this is how bad it can get.

Why Treatment Is Ineffective

If you have peach leaf curl on your trees, treatment will be ineffective because the leaves protect the spores around the buds. You will need to wait until the end of the season to manage this aggravating disease. If you have a severe care of the disease, it is very important that you maintain tree vigor by thinning more fruit than normal. Also, irrigate to reduce any stress caused by drought and apply extra nitrogen fertilizer to the soil.

*There Is No Cure*

Once a leaf is infected, there is no cure. You must remove them and destroy them, but do NOT put them in your compost heap. You must use preventive measures outlined in this article. This disease has ruined peach crops in the United States for over 100 years and it most likely isn't going to go away anytime soon.

Preventing Peach Leaf Curl in the Future

There are certain varieties of peach and nectarine trees that are resistant to peach leaf curl, and I suggest you seek those out in whatever zone you are in, as I expect different varieties will be more or less resistant depending on your zone.

If you've had infected trees before, you should always use a dormant-season fungicide - one that contains lime sulfur spray (or a Bordeaux mixture), but you will need to wait until the last leaf falls. Then, in the spring, spray them again before any new leaves appear. If you wait until buds are open on the tree before using a fungicide, you have waited too long and there is no need to spray again.

For severe infestation, a fungicide spray in the late fall and late winter or early spring might effectively manage peach leaf curl.

If you have peach orchards, you will need to wait until almost all of the leaves have fallen or before bud swell in the spring to attempt to control the disease. During those times, applying a fungicide (chlorothalonil) or copper spray would be appropriate.

Growers in future seasons will have to monitor the upcoming February temperatures closely because if temperatures are forecast to be above average, the dormant fungicide spray will need to be applied prior to those warmer days in order to effectively control the fungus around the buds.

The most effective prevention will usually consist of planting only stock that has been acquired from reliable nurseries and pruning any twigs/leaves that have signs of infection.


  1. (retrieved from website 05/07/2018)
  2. Rutter, John The Culture and Diseases of the Peach: A Complete Treatise for the Use of Peach Growers
  3. (retrieved from website 3/27/2018)

This content is accurate and true to the best of the author’s knowledge and is not meant to substitute for formal and individualized advice from a qualified professional.

Questions & Answers

  • I have curl on my peach trees. How should I treat them?

    Leaf curl can be controlled by applying sulfur or copper-based fungicides that are labeled for use on peaches and nectarines. Spray the entire tree after 90% of the leaves have dropped in the fall and again in the early spring, just before the buds open. I have a peach tree and keep holding my breath every time I look at it, but so far, so good.

© 2012 Mike and Dorothy McKenney


    0 of 8192 characters used
    Post Comment

    No comments yet.


    This website uses cookies

    As a user in the EEA, your approval is needed on a few things. To provide a better website experience, uses cookies (and other similar technologies) and may collect, process, and share personal data. Please choose which areas of our service you consent to our doing so.

    For more information on managing or withdrawing consents and how we handle data, visit our Privacy Policy at:

    Show Details
    HubPages Device IDThis is used to identify particular browsers or devices when the access the service, and is used for security reasons.
    LoginThis is necessary to sign in to the HubPages Service.
    Google RecaptchaThis is used to prevent bots and spam. (Privacy Policy)
    AkismetThis is used to detect comment spam. (Privacy Policy)
    HubPages Google AnalyticsThis is used to provide data on traffic to our website, all personally identifyable data is anonymized. (Privacy Policy)
    HubPages Traffic PixelThis is used to collect data on traffic to articles and other pages on our site. Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.
    Amazon Web ServicesThis is a cloud services platform that we used to host our service. (Privacy Policy)
    CloudflareThis is a cloud CDN service that we use to efficiently deliver files required for our service to operate such as javascript, cascading style sheets, images, and videos. (Privacy Policy)
    Google Hosted LibrariesJavascript software libraries such as jQuery are loaded at endpoints on the or domains, for performance and efficiency reasons. (Privacy Policy)
    Google Custom SearchThis is feature allows you to search the site. (Privacy Policy)
    Google MapsSome articles have Google Maps embedded in them. (Privacy Policy)
    Google ChartsThis is used to display charts and graphs on articles and the author center. (Privacy Policy)
    Google AdSense Host APIThis service allows you to sign up for or associate a Google AdSense account with HubPages, so that you can earn money from ads on your articles. No data is shared unless you engage with this feature. (Privacy Policy)
    Google YouTubeSome articles have YouTube videos embedded in them. (Privacy Policy)
    VimeoSome articles have Vimeo videos embedded in them. (Privacy Policy)
    PaypalThis is used for a registered author who enrolls in the HubPages Earnings program and requests to be paid via PayPal. No data is shared with Paypal unless you engage with this feature. (Privacy Policy)
    Facebook LoginYou can use this to streamline signing up for, or signing in to your Hubpages account. No data is shared with Facebook unless you engage with this feature. (Privacy Policy)
    MavenThis supports the Maven widget and search functionality. (Privacy Policy)
    Google AdSenseThis is an ad network. (Privacy Policy)
    Google DoubleClickGoogle provides ad serving technology and runs an ad network. (Privacy Policy)
    Index ExchangeThis is an ad network. (Privacy Policy)
    SovrnThis is an ad network. (Privacy Policy)
    Facebook AdsThis is an ad network. (Privacy Policy)
    Amazon Unified Ad MarketplaceThis is an ad network. (Privacy Policy)
    AppNexusThis is an ad network. (Privacy Policy)
    OpenxThis is an ad network. (Privacy Policy)
    Rubicon ProjectThis is an ad network. (Privacy Policy)
    TripleLiftThis is an ad network. (Privacy Policy)
    Say MediaWe partner with Say Media to deliver ad campaigns on our sites. (Privacy Policy)
    Remarketing PixelsWe may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.
    Conversion Tracking PixelsWe may use conversion tracking pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to identify when an advertisement has successfully resulted in the desired action, such as signing up for the HubPages Service or publishing an article on the HubPages Service.
    Author Google AnalyticsThis is used to provide traffic data and reports to the authors of articles on the HubPages Service. (Privacy Policy)
    ComscoreComScore is a media measurement and analytics company providing marketing data and analytics to enterprises, media and advertising agencies, and publishers. Non-consent will result in ComScore only processing obfuscated personal data. (Privacy Policy)
    Amazon Tracking PixelSome articles display amazon products as part of the Amazon Affiliate program, this pixel provides traffic statistics for those products (Privacy Policy)
    ClickscoThis is a data management platform studying reader behavior (Privacy Policy)