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Whats wrong with my watermelon?!

Posted by Derek1598 none (My Page) on
Mon, Aug 19, 13 at 16:58

This is only on one of my watermelons and I ripped it out because im afraid the disease (if it is one) will spread. What the hell is this I've never seen these odd black/brown spots before. The vine had stopped growing (hasnt grown at all in days) so I decided to take it out.

Picture : http://i.imgur.com/00b6mN3.jpg


Follow-Up Postings:

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RE: Whats wrong with my watermelon?!

Edit : it has spread and i sprayed a Dawn/Water mix on it....i dont know im getting paranoid right now.


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RE: Whats wrong with my watermelon?!

I can't identify your problem with any certainty [maybe alternaria?], but if you're really concerned, you should be using a real fungicide to protect your other plants.


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RE: Whats wrong with my watermelon?!

Thank you I will look around for Fungicides. I had to make a make shift thing because I was babysitting and couldn't leave my house.


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RE: Whats wrong with my watermelon?!

Daconil/Fung-oil/chlorthalonil is a widely available wide-spectrum fungicide.

I hope someone else has a more informed answer about your specific problem.

If you've pulled the plant because you think it's diseased, best to trash it, not compost it.


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RE: Whats wrong with my watermelon?!

I have the exact same thing every year on my plants. Usually starts late in season, and affects older leaves first. I have some spots now and have been vigilant with the daconil and got the disease anyway. Will try spraying once more. Just hoping the melons ripen before the plant dies.


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RE: Whats wrong with my watermelon?!

Don't think a disease. Possible environmental/cultural.

If the plant is still alive, please post an image of the plant.


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RE: Whats wrong with my watermelon?!

The fruit is no where near ripeness, I'm going to try Daconil and pray.


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RE: Whats wrong with my watermelon?!

It's dark out and there are a lot out there still I just took that one out and ripped affected leaves off the others. I will post pictures tomorrow. Ciao!

This post was edited by Derek1598 on Tue, Aug 20, 13 at 0:39


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RE: Whats wrong with my watermelon?!

Here's 4 of my watermelons and 1 of my thriving pumpkin vines. Also, I literally threw my garden together hastily June 1st so please keep the crappiness comments of crabgrass nearby, etc to yourselves :). I know lol next year I'm gonna do it earlier and better.

Here they are : http://imgur.com/S2nefRq,4nRKLiW,b3tmiaw,w8OeeAn,mFZ8e56


Any help/identification would be GREATLY appreciated.


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RE: Whats wrong with my watermelon?!

Derek - you might also post over in the vegetable forum where there are more people familiar with curcubit crops.


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RE: Whats wrong with my watermelon?!

I saw your photos and your post on the vegetable forum. Your bigger issue is that overall it just looks like the watermelons aren't thriving. Not sure if it was the soil, food, weather, whatever. Not sure where you are located, but if you have a long season you might still get a crop. The smaller issue is the brown spots on the leaves. Like I said earlier, I have the same problem, but usually doesn't start until late, and the melons are almost ripe. I just removed all of my infected leaves and gave a good drench of daconil. IMO it's a disease because I saw some of the spots on old and young leaves too.


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RE: Whats wrong with my watermelon?!

  • Posted by fruitnut z7b-8a,4500ft SW TX (My Page) on
    Tue, Aug 20, 13 at 18:24

Mine get similar issues this time of year. I don't think it's serious. Your plant needs a lot more nitrogen. The leaves and plants aren't big enough to grow an eatable melon.

I think the spots are partly related to the lack of fertility and partly old age. I've had several foliar diseases but don't count that look among them.


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RE: Whats wrong with my watermelon?!

I live in Zone 6, a suburb of boston MA. Thanks for the replies. I have not fertilized at all. Next year I will do a heavy nitrogen fertilizer. As for this year, I'll count my losses. I really appreciate everyones help, honestly I do. I just threw these in the ground as I said, not expecting anything. How should I fertilize Melons next year?


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