Environ. Horticulture, Pears, Cherries, and Viticulture
University of California
Environ. Horticulture, Pears, Cherries, and Viticulture

Virtual Farm Call: You Be the Judge

Had the fruit pictured below show up in one of my pick plots, and figured I'd put this one out to the readers on some opinions on what this could be.

The brown lesions on the fruit are hard, but not sunken like one would see with anthracnose.  Not really any visible signs of disease like mycelium or spores, nor any insect type of activity or remains.  Not a lot of other fruit in the field that looked like this one.

You be the judge - what would your call be?  I'll add some comments to this in a week or so as to what my thoughts are concerning this one.

 

6/11/2020 Update:  The call on this one is physiological, from the wind and or Sun.  The damage was more prevalent in the field towards the edges, on plants with less fruit.  However, always keeping in mind that I could be wrong (and take note of other experts like our colleague from Argentina who wrote in that it could very well be disease), I advise to keep an eye on it, especially if it starts to spread and or disease signs show up.

thumbnail IMG 1093
thumbnail IMG 1093

Posted on Friday, May 29, 2020 at 3:24 PM

Comments:

1.
Hi Mark, interesting question. Fusarium and Neopestalotiopsis cause similar symptoms in fruit. I also see some spots in the calyx, tha are probably related to the same problem. Is there any physical damage in the center of the circle?  
Greetings

Posted by Daniel Kirschbaum on May 30, 2020 at 9:09 AM

2.
It's an honor to have you check in all the way from Argentina Daniel! Yes, the spots on the calyx gave me pause, and yes we have seen symptoms reminding one of Neopestalotiopsis in this field a number of years ago.

Posted by Mark Bolda on May 30, 2020 at 11:49 AM

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