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 Post subject: Potato leaf spots
PostPosted: Tue Apr 28, 2009 4:08 pm 
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Location: Dallas,TX
My potatoes are very happy and healthy. However, recently I am noticing some brown splotches on the lower part of some of the leaves. I am hoping it is the result of too much water but would like some ideas. I am attaching a photo below.


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File comment: Here is a picture of the brown leaf splotches.
Potato leaf spot 001.JPG
Potato leaf spot 001.JPG [ 55.93 KiB | Viewed 1170 times ]
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 Post subject: Re: Potato leaf spots
PostPosted: Wed Apr 29, 2009 8:39 pm 
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are the areas that are brown also very thin? Looks like there's been a pest sucking the juice out of the leaves to me.

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 Post subject: Re: Potato leaf spots
PostPosted: Thu Apr 30, 2009 7:04 am 
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Yes they are thin. Any idea of what kind of pest it could be?


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 Post subject: Re: Potato leaf spots
PostPosted: Mon May 11, 2009 4:02 pm 
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Could be 4-line plant bug. They have bright red underbelly and suck the juice out of leaves enough that it makes the leaf wilt or makes it look like a fungal disease.

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 Post subject: Re: Potato leaf spots
PostPosted: Mon May 11, 2009 5:08 pm 
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You are correct on the 4-line plant bug. I saw them on the folliage. I sparyed them with some clove insectacide and it seems to work pretty good. Thanks for your input. It's one of the few things that product seems to work on.


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 Post subject: Re: Potato leaf spots
PostPosted: Tue May 12, 2009 9:09 am 
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The other good thing is that the 4-line bug disappears when the weather turns hot.

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 Post subject: Re: Potato leaf spots
PostPosted: Tue May 12, 2009 9:19 am 
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Coinsidentally so do the potatoes.


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 Post subject: Re: Potato leaf spots
PostPosted: Wed May 13, 2009 8:22 am 
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darn the luck

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 Post subject: Re: Potato leaf spots
PostPosted: Sun Jun 21, 2009 10:22 am 
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We, too have spots on the leaves of our potatoes. See the pictures.

Is this the dreaded blight? or something less sinister?

All help would be greatly appreciated. This is our first season with Potatoes.
For reference, the varieties are Vivaldi, Dunluce and Maris Piper.

Thanks,
Pete


Attachments:
Potatoleaf3s.jpg
Potatoleaf3s.jpg [ 9.18 KiB | Viewed 997 times ]
potatoLeaf2s.jpg
potatoLeaf2s.jpg [ 8.57 KiB | Viewed 993 times ]
potatoLeaf1s.jpg
potatoLeaf1s.jpg [ 9.69 KiB | Viewed 993 times ]
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 Post subject: Re: Potato leaf spots
PostPosted: Sun Dec 30, 2012 11:30 am 
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I found a photo of the bug online so am posting it for my benefit and those others who will be working on another crop of potatoes soon. Thanks, Sandi!

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File comment: Here is an image of the four-lined bug from the Purdue University ag site. I haven't seen this one in my yard yet, but it is usually only a matter of time before they find their way here. Since it's about time to plant potatoes, it's time to start looking out for the various pests.
4lined_plant_bug-plant[1].jpeg
4lined_plant_bug-plant[1].jpeg [ 42.24 KiB | Viewed 337 times ]

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 Post subject: Re: Potato leaf spots
PostPosted: Sun Dec 30, 2012 12:11 pm 
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Just remember that potatoes are not normally harmed by this bug; it just makes the foliage look bad. Plant organic seed potatoes in February and harvest them in May.

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