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chard damage #807852

Asked August 24, 2022, 3:06 PM EDT

My entire crop of red/green/yelloew chard has been damaged by bugs or fungus of some sort. Thinking it was bugs I have sprayed diligently with Neem Oil to no avail. See pictures below. Do you know what may be causing the damage?

Summit County Ohio

Expert Response

Hi Terry,
Thank you for your gardening question. Thank you for sending pictures. Did you see and identify any insects before you used the neem oil? What did they look like? It looks like you may have a couple different issues and I am attaching information to help and give you photos to confirm.
The first photo looks like it may be Flea beetle take a look at this to confirm and manage.
https://apps.extension.umn.edu/garden/diagnose/plant/vegetable/swisschard/leavesholes.html
https://extension.unh.edu/blog/2020/06/how-do-i-get-rid-flea-beetles-my-vegetable-garden
https://extension.sdstate.edu/dealing-flea-beetles

https://ag.umass.edu/vegetable/fact-sheets/cercospora-leaf-spot-of-swiss-chard-beets-spinach

I am also attaching an article on growing swiss chard. https://hort.extension.wisc.edu/articles/swiss-chard/

Be sure to read the entire label and follow instructions before using any chemical organic or synthetic, making sure your issue is on the label. 

Kim C.  Replied August 28, 2022, 8:55 PM EDT

Kim,

I did have a heavy infestation of Japanese beetles this summer, first time ever. They were attracted by a patch of wildflowers we sowed in proximity to the chard garden.  However, I never noticed any of them on the chard.  Are they same as “flea beetles”?

 

Best,

Terry

 

From: askextension=<personal data hidden> <askextension=<personal data hidden>> On Behalf Of Ask Extension
Sent: Sunday, August 28, 2022 8:56 PM
To: Terry Bedell <<personal data hidden>>
Subject: Re: chard damage (#0077783)

 

The Question Asker Replied August 29, 2022, 10:13 AM EDT

Kim,

Thanks for your response.  I will review your information. I have not noticed any insects.  At first indication of damage, I treated with the neem oil as I have had success in year’s past.  I figured it was same issue.

 

Best,

Terry

 

From: askextension=<personal data hidden> <askextension=<personal data hidden>> On Behalf Of Ask Extension
Sent: Sunday, August 28, 2022 8:56 PM
To: Terry Bedell <<personal data hidden>>
Subject: Re: chard damage (#0077783)

 

The Question Asker Replied August 29, 2022, 10:13 AM EDT
Hi Terry,
Hopefully the information helped. Flea beetles are small black beetles that seem to move very quickly vs Japanese beetles. Japanese beetles seem to skeletonize leaves very quickly vs flea beetles leaving lots of small holes. If you do see an insect feel free to take a picture and send it to me. 
Kim C.  Replied August 29, 2022, 8:16 PM EDT

Kim,

Thanks for the info.  This should be helpful. The information seems to indicate it’s the fungus and best solution is a chemical additive.  Are the chemicals readily available at home/garden stores?

Rotation of vegetable varieties seems good too, at least for one year. Hate to use chemicals as I try to stay as ‘organic” as possible.  Likely safe to assume the chemicals are a bit toxic?

 

I placed some of the damaged leaves in my compost pile.  I would assume the compost pile is now contaminated with the fungus.

 

Thoughts.

 

Best,

Terry

 

From: askextension=<personal data hidden> <askextension=<personal data hidden>> On Behalf Of Ask Extension
Sent: Monday, August 29, 2022 8:17 PM
To: Terry Bedell <<personal data hidden>>
Subject: Re: chard damage (#0077783)

 

The Question Asker Replied August 30, 2022, 9:51 AM EDT
Hi Terry
I would try all the mechanical controls before using a fungicide mentioned in the article. You will probably find great success.  One of the mechanical controls in the article I sent is to bury the leaves. Can you turn your pile over keeping these leaves buried? 
Kim C.  Replied August 30, 2022, 3:10 PM EDT

Kim,

You say: “bury the leaves”, you are referring to the damaged leaves I removed from among the healthy plants?

 

Is it Ok to leave the dead plants in place at end of season and bury them in the garden?  Or should I remove and bury them elsewhere?

 

Some of the plants have minimal damage.  Is it OK to eat them?

 

Best,

Terry

 

From: askextension=<personal data hidden> <askextension=<personal data hidden>> On Behalf Of Ask Extension
Sent: Tuesday, August 30, 2022 3:10 PM
To: Terry Bedell <<personal data hidden>>
Subject: Re: chard damage (#0077783)

 

The Question Asker Replied August 30, 2022, 4:04 PM EDT
Hi Terry
Regarding burying leaves I meant the ones you already placed in the compost. Yes you should clean out the effected plants and any weeds on that grow in that area. I wouldn't throw anymore in your compost bed. https://ag.umass.edu/vegetable/fact-sheets/cercospora-leaf-spot-of-swiss-chard-beets-spinach
Regarding eating the affected plants , I can't find anything information for or against. 
Next year look for resistant seeds and rotate your crops. 
Kim C.  Replied September 01, 2022, 12:54 PM EDT

Kim,

So, no chard in that garden space next year, correct?  My wife uses chard every day in her “chard smoothie”.—blueberries, flax, chard, green tea.

Her summer/fall crop gives us a break from buying at market.

 

I got to thinking later,  something I did differently this year was to use straw bought at local Lowe’s store to keep the weeds down.  I’m curious if that may have contributed to the fungus.  The straw bale looked as though it had been around awhile and had darkened in areas.

 

Thanks for all your suggestions.

 

Best,

Terry

 

From: askextension=<personal data hidden> <askextension=<personal data hidden>> On Behalf Of Ask Extension
Sent: Thursday, September 1, 2022 12:55 PM
To: Terry Bedell <<personal data hidden>>
Subject: Re: chard damage (#0077783)

 

The Question Asker Replied September 01, 2022, 2:46 PM EDT
Hi Terry 
Yes I would not plant chard in the same area it is planted in this year. Swiss chard also does great in containers or window boxes if you need a different spot. 
Kim C.  Replied September 01, 2022, 3:17 PM EDT

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