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PostPosted: May 13th, '18, 20:00 
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Hi everyone,

So I have a strange looking deficiency in my Pak Choy leaves that look like a Magnesium deficiency but I'm not sure because the burning is starting from the inside of the leaf out. Can someone help confirm or pinpoint what deficiency it is? Here are some pictures.

Thanks for any help or insight.

Karim


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PostPosted: May 13th, '18, 21:54 
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Thats not a deficiency, it's something viral or bacterial, perhaps fusarium wilt. I'd pull them and get rid of them.

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PostPosted: May 14th, '18, 00:53 
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Thanks earthbound. I tried googling it, but the pictures don't look so much like what I have. I will get rid of them for sure, any idea where something like this might be coming from? Is there anything I can do to prevent it from spreading or coming back again?


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PostPosted: May 14th, '18, 01:46 
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How many gallons is your system and what the gph ?

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PostPosted: May 14th, '18, 04:19 
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Earthbound's suggestion to pull the plants is probably the best way to keep it from spreading wash your hands after doing this. At least one of those (the shot with your hand under the leaf) looks like the problem started where water stood for too long so avoid splashing water up on the leaves. The folding of the leaf and the light stippling on the leaf in that picture, could be an indication that spider mites are on the underside so it might be worth checking since that's another issue.


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PostPosted: May 15th, '18, 14:19 
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rshultes wrote:
How many gallons is your system and what the gph ?

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My system has about 2000 gallons in total including the piping network. And my flow rate is about 3300 gallons per hour.


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PostPosted: May 15th, '18, 14:23 
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scotty435 wrote:
Earthbound's suggestion to pull the plants is probably the best way to keep it from spreading wash your hands after doing this. At least one of those (the shot with your hand under the leaf) looks like the problem started where water stood for too long so avoid splashing water up on the leaves. The folding of the leaf and the light stippling on the leaf in that picture, could be an indication that spider mites are on the underside so it might be worth checking since that's another issue.


Is the best way to take care of the spider mites, if present, to treat with neem oil? I have taken these affected plants out of the system and got rid of them so I don't think I can check for the mites, but I would like to know in case I see some in the future.


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PostPosted: May 15th, '18, 14:48 
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Neem would probably work but I haven't used it. Some other people here have used Neem for this and can tell you more.

My situation is probably different than most. Spider mites are usually only a problem when it's hot (above 80 degrees F). This is a pretty cool climate and most of the time our nights in the 50's and 60's so they are pretty slow to get going.

When I see spider mites on bush beans I can pretty much count on being able to harvest without having to spray, then I just discard the plants and start a second crop in a week or two. If I need to let the beans mature I'll wash them off with a spray of water from the hose, flipping the leaves so I can get at them if I need to.


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