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Vegetable Gardening

Cucumber leaves getting burned??

9 years ago

Was hoping the bright folks here can help my identify what is wrong with my cukes. They are producing like wildfire but the leaves are manifesting these strange "burn" marks. I use all organic fertilizers and they are planted in pots, if that makes any difference.

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Comments (4)

eric
9 years ago
Either these 2: a fungal infection or an insect as the vector of a kind of virus. Might as well cut off those leaves and disposed it properly. Do not compost it nor leave it in your garden. That is contagious...
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njitgrad
9 years ago
last modified: 9 years ago
I have that problem every year. I even planted disease resistant varieties this year and I still got it. I managed to pick a dozen or so cukes already but I think my production will be coming to a conclusion soon since I am cutting off more leaves daily than are being replaced with new growth. I wish so badly I could figure this out. I've used Daconil weekly this year and still no change.
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What have your night time temps been averaging? I'm further north but also zone 7 and I won't get my cukes going for at least a few weeks. You could give them some protection at night by covering them with an empty pot before the sun goes down and then removing it again in the morning so they don't cook during the day. I would check with your local agricultural extension for the best dates to sow them in your area and consider direct sowing some seeds. Odds are, they will catch up and surpass your transplants.
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Added zone info. Well, I won't be able to find out (quickly) now by digging. Just had a thunderstorm with rain pouring down all night. Guess I'll see if that helps. The whole plant itself isn't bad. Aside from the brown patches, there is no other obvious issue. No leaves/branch die back. The last couple of weeks has been hot and with clear sun. Just hovering over 30C degree and the location gets full sun from morning to probably 3-5pm. However I have some hydrangea (also new) in the vicinity so I have been forced to water them daily with this heat. I did try to avoid the Burning bush somewhat when watering so it isn't soaked every day. The soil in that spot is decently deep, but hasn't been planted with for probably over a decade. I added alot of compose before planting. Lota cedar mulch, more so on the hydrangea, but should be a good 2" around the burning bush too.
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cj_speciosa
Original Author
9 years ago
I've been cutting them off as I like to keep all of my garden plants "clean" I'm going to hit them with a super dose of fertilizer and see what that does.
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eric
9 years ago
be careful of fertilizers...plants that use them would produce a lot of aromatic amino acids. This can attract insects. Moreover, using a fertilizer with high N content would result to lush vegetation and less fruiting.

Try changing your soil pH by putting baking soda solution. Say 1 tablespoon per liter. If it is a fungal infection, the solution can kill the fungus. On the other hand, for viral and bacterial matters, try using a copper based agri grade solution.
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