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Dillsburg, PA

Hey guys, have something going on with some of my plants. Yellow leaves starting with the oldest and traveling down the main vine. Good size pumpkins (day 20) stop growing. Any ideas?
http://www.bigpumpkins.com/Diary/DiaryViewOne.asp?eid=70105

7/28/2007 1:12:41 PM

Dillsburg, PA

Other pics added. No sign of rot or svbs on the vine. Few cuke beatles. Fruit stop growing but not rotting at this point. 364 Andrews did this 1 month ago with both Frantz pumpkins going down this week and last week.

7/28/2007 1:28:18 PM

Cincinnati,OH

Could be powdery mildew.

7/28/2007 7:39:13 PM

Mt.Pleasant,Iowa

Probably the same thing I have Jeff.Yellow vine Disease no cure carried by squash bugs.Its kind of a new disease the past few years. Not a good thing to have.

7/28/2007 7:53:51 PM

Dillsburg, PA

Marty, looking at your pic of your ag plant it does look very close. If possible could you take a closeup of your damaged leaves? How do you get these things diagnosed?

7/28/2007 9:39:31 PM

Mt.Pleasant,Iowa

Jeff it is close to Bacterial wilt and sometimes gets diagnosed as bacterial wilt. I have had this for 4 years now and Its either cucumber mosaic or yellow vine disease.Not all plants may get it if you control all the bugs early. I have been spraying every 4 days or more and still got it but the bugs really never left completely so I need to spray more next year.If you still have a good plant make sure you spray often.You can goggle yellow vine disease and read more.It takes mant weeks for the plant to get very bad but the fruit that keeps setting will abort in time as the vine go down one at a time.

7/28/2007 9:59:46 PM

Ctpumpkin@optonline.net

Jeff

First off, the soil looks very dry. Is it? Poke around with a coring tool or your fingers. Is there moisture an inch down?

Take a leaf off that is still mostly green but right next to those failing leaves. Bring it inside where the light is good. Look at the bottom of the leaf. If your camera has a "MACRO" setting, try to get a closeup shot of the BOTTOM of the leaf & post it.

Like Ron said, it could be Powdery Mildew. It could also be a virus but it doesn't look that way to me. I'd also check for mites. You'll see webbing & can shake some off onto a white sheet of paper if it is. Mites are smaller than the head of a pin so look VERY closely & use a magnifying glass. There have been a lot of Thrips this year & their feeding will do this too. They are also hiding under the leaves so this same test would reveal them too.

Bacterial Wilt is VERY fast. Once it gets going the plant will fail in a matter of days. If this has been a gradual decline, it isn't BW.

7/29/2007 12:13:33 AM

Dillsburg, PA

Yes, the soil is dry now as once the pumpkins aborted I quit watering these plants and it hasn't rained in weeks. I have had PM before and can recognize it. White spots underneath leaves. Not BW as these plants are still alive even after a month. Very little cuke beatles this year. I have had squash bugs though only found on the affected plants. Never on the three that are still healthy. Which is wierd. I'll post a picture.

7/29/2007 4:30:35 AM

Dillsburg, PA

Picture sent to diary. Steve, I sent you a better one via email. Thanks guys for the help.

7/29/2007 2:45:19 PM

Dillsburg, PA

Anyone have recommendations on where I could send a tissue sample? Does A&L eastern do that stuff?

7/30/2007 7:42:29 AM