Pests, Diseases and Other Problems
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Subject: Yellow leaves on new growth and fruit split
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From
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Location
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Message
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Date Posted
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buca |
Europe
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One of my plants was late to set a fruit and now it has split. With some luck the will be warm ... I have read somewhere on the bigpumpkins that you should never loose hope.
Last week was warm and dry. I have drip irigated twice a day with rain water (I am able to collect lots of it from our roof). Yesterday I have noticed the split and the new growth is somehow yellow. I posted some pictures in my diary, I have taken them today during a havy rain.
http://www.bigpumpkins.com/Diary/DiaryViewOne.asp?eid=140904
here is also the picture of the plant and fruit
http://www.bigpumpkins.com/Diary/DiaryViewOne.asp?eid=140903
http://www.bigpumpkins.com/Diary/DiaryViewOne.asp?eid=140906
What should I do to help the plant and save the fruits that are forming now?
Should I add come form of ready available calcium (nitrate, kelate)? Maybe it is lack of iron, but as I have read Fe deficency is manifestated in the older leaves, not the young ones. A soil test is not an option at the moment.
I would apreciate any help.
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7/29/2010 3:32:13 PM
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hoots dirt (Mark) |
Farmville, Virginia (mfowler@hsc.edu)
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Kinda looks like early stages of Downy mildew. Not sure if it can really be controlled once it sets in. Do the leaves still seem to be getting worse?
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7/31/2010 8:11:24 PM
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christrules |
Midwest
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It looks like a disease. Waiting on your answer to Hoosts question. Also, what type of soil (heavy clay, sandy?) and do you have a fungicide spraying program?
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8/3/2010 1:40:23 PM
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buca |
Europe
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Thank you hoots and cristrules for your reply, sorry for my late reply.
The situation is not worse, but not a lot better eighter. Here is what I did. I went to a shop for farmers and bought a contact fungicide against Downy mildew (Bravo). There was a link to a page with data on pesticides that do not harm mycorrhizae, I have lost it so I made a random choice between the available. I have add also a calcium fertiliser with aminoacids for quick absorbtion. I have polinated a female on the main vine. It did take, but is growing very slowly. It was so also with the first fruit that did not grow a lot at first, than it started and split. The most yellow growth is in its neinghbourhood. There is a nice fruit on the secondary vine, selfpolinated and I thoungt of cutting it off at first. It looks that it is going to be my last chance for this year at 15 day it is 31,5 inch circumference.
I did ask also the agriculture experts for our region to have a look at a couple of leaves. They do not have that much experience with pumpkins, but they agreed that if it was a grape vine leaf it would sure be lack of K. Do you think it is possible?
wishing you all the best
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8/6/2010 2:43:32 PM
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Midnight Gardener |
Sacramento, Ca
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I agree with hoots dirt, it looks like the start of downy mildew. see my patch last year at the links below. I had it and it will take your plant down in a hurry.
This is this years plant
http://www.bigpumpkins.com/Diary/DiaryViewOne.asp?eid=142106
This is last years plant
http://www.bigpumpkins.com/Diary/DiaryViewOne.asp?eid=120125
This is the end result
http://www.bigpumpkins.com/Diary/DiaryViewOne.asp?eid=119662
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8/8/2010 5:03:16 PM
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ZAPPA |
Western PA
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Can downy mildew start on any section of the plant like that? I don't know but on all 3 of melon plants, it started at the stump and worked its way out. If it can start anywhere on the plant than I may have a pumpkin plant in my main patch that is getting downy.
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8/8/2010 8:58:32 PM
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christrules |
Midwest
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I think you are on the right track. You can combine that with a systemic fungicide (like Immunox or Eagle 20).
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8/9/2010 1:40:06 PM
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buca |
Europe
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I thought of posting an update to give some hope to others that might be desperate about leaves problems as I was.
I will sure not break any records with this one, but still hope to harvest a nice fruit.
http://www.bigpumpkins.com/Diary/DiaryViewOne.asp?eid=144324
http://www.bigpumpkins.com/Diary/DiaryViewOne.asp?eid=144325
I have fighted with fungicides against pm and dm. The yellow spots on the leaves have not disapeared, but at least it did not spread to the rest of the plant. I really hope it is not a kind of virus.
Thanks to all for your oppinions.
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8/27/2010 3:47:55 PM
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Total Posts: 8 |
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