Eastern New York Commercial Horticulture Enrollment

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Managing Anthracnose Fruit Rot of Blueberries

Laura McDermott, Team Leader, Small Fruit and Vegetable Specialist
Eastern New York Commercial Horticulture

May 24, 2018

anth. blue

Anthracnose (Colletotrichum acutatum) is a serious pre- and post-harvest fruit rot in most blueberry growing regions. The flowers are infected early in the spring.  Cane, twig, and leaf lesions are more sporadic.

Symptom: The fruit rot manifests itself as sunken areas on ripe fruit with gelatinous, orange spore masses. On young canes, lesions are dark brown with fruiting bodies in concentric circles. On twigs, dark brown lesions may originate from infected buds and kill part of the twig. On the leaves, lesions look reddish brown with distinct borders. Salmon-pink spore masses may appear on infected tissues under humid conditions.

Disease cycle: The fungus overwinters in infected twigs, old fruiting spurs and live buds. In spring and summer, spores produced on infected tissues are dispersed by rain and cause new infections. Spores are released between bloom and early fruit development. Prolonged wetness (12 hours or more) and temperatures of 68-77F (20-25C) promote disease development. Fruit infections remain latent until the fruit starts to ripen or until after harvest.

Management: Prune out old or infected wood; create an open canopy to reduce humidity and increase spray penetration; plant resistant cultivars; limit overhead irrigation; harvest in a timely manner; cool fruit rapidly after harvest; apply effective fungicides from pink bud to harvest.  Abound, Serenade Max, Bravo, Captevate are just a few of them.  Double Nickel has some efficacy for organic growers.  If you are spraying for mummyberry you will likely take care of anthracnose.  To prevent recurrence the following year, make sure to apply petal fall spray.  For additional materials that are labelled in NYS, refer to your 2018 Cornell Berry Pest Management Guidelines.  Photos were taken by C. Heidenreich, Cornell University.  Additional information can be obtained through Michigan State University fact sheet


This article was printed in the May 24th issue of the CCE ENYCHP Berry News.  To view the full newsletter click here.



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Pumpkins / Gourds

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Raspberries / Blackberries

Raspberries / Blackberries

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Squash - Summer

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Upcoming Events

New York Labor Roadshow VII

December 15, 2023
Greenwich, NY

New York Labor Roadshow VII: December 2023 Offered by New York's Ag Workforce Development Council

New York's Ag Workforce Development Council (AWDC) is currently organizing Labor Roadshow VII.  The Eastern NY event will be held on December 15 in Greenwich, NY from 8:30-4:15.

View New York Labor Roadshow VII Details

Announcements

2023 Spotted Wing Drosophila Monitoring/Management

All berry farmers are watching for monitoring reports that indicate Spotted Wing Drosophila (SWD) adults are in their region. Mid-season berry crops should be sprayed as soon as berries begin to ripen unless you've elected to use insect exclusion netting.

- For general information about SWD, and to enroll for free monitoring reports, visit the Cornell SWD blog https://blogs.cornell.edu/swd1/.
- Click here for the 2023 Quick Guide for Pesticide Management. 
- For some great instructional videos and fact sheets on insect exclusion netting, visit the University of Vermont's Ag Engineering blog.


Resources from CCE ENYCHP!

We are developing new ways to connect with the CCE ENYCHP team this year! We have a Youtube page located at this link. Check out videos on Table Grape Production, Pest Updates and the 20 Minute Ag Manager - in 4 Minutes series

We have a Facebook Page here as well as an Instagram page. We keep these places updated with current projects, events, and other interesting articles and deadlines.

There are also text alerts available. Fruit and vegetable farmers in 17 Eastern NY counties can now receive real time alerts on high risk disease and pest outbreaks texted directly to their cell phone. The Eastern NY Commercial Horticulture program, which is supported by local Cornell Cooperative Extension associations, will now offer text alerts to those that enroll in our program in 2019. 

The text alerts will be reserved for important crop alerts that could impact management decisions immediately. For instance, if there were an outbreak of Late Blight in the area, this would be transmitted to vegetable growers.

Farmers can choose the crop for which they wish to receive updates. Additionally they can request that Ag Business Alerts be sent to them. These alerts might include due dates for crop insurance deadlines, market opportunities etc.

If you have questions, please contact enychp@cornell.edu


Podcasts

Winter Greens Grower Interviews in Northern New York

October 22, 2022
In this episode, vegetable specialist Elisabeth Hodgdon interviews Lindsey Pashow, ag business development and marketing specialist with the Cornell Cooperative Extension Harvest New York team. They discuss findings from a series of interviews with winter greens producers in northern New York. Lindsey shares production and marketing challenges associated with growing winter greens in this cold and rural part of the state, success stories and advice from growers, and tips for those interested in adding new crop enterprises to their operation.

Funding for this project was provided by the Northern New York Agricultural Development Program. The episode was edited by Miles Todaro of the ENYCHP team.

Resources:
• Crop enterprise budget resources available from Penn State Extension (field and tunnel vegetables: https://extension.psu.edu/small-scale-field-grown-and-season-extension-budgets), UMass Extension (winter spinach budgets: https://ag.umass.edu/vegetable/outreach-project/improving-production-yield-of-winter-greens-in-northeast and field vegetables: https://ag.umass.edu/vegetable/fact-sheets/crop-production-budgets), and Cornell Cooperative Extension (high tunnel vegetables: https://blogs.cornell.edu/hightunnels/economics/sample-budgets-spreadsheets/). Use these budgets as templates when developing your own crop enterprise budget.
• The Organic Farmer’s Business Handbook, by Richard Wiswall
• The Winter Harvest Handbook, by Eliot Coleman

For questions about the winter greens project discussed in this podcast, reach out to Lindsey Pashow (lep67@cornell.edu) or Elisabeth Hodgdon(eh528@cornell.edu).

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