Cucumber leaves going yellow

**Tomatoking** · 05-07-2010, 05:11 PM

Its sounds like red spider mite.

You can see the very fine cobwebs on the edges of this leaf. They tend to be about in hot weather.

**DaveC** · 07-07-2010, 04:31 PM

My leaves also turned yellow so I reduced the amount I was watering them and cut the yellow leaves off. They have been much heathier since.

As for the red spider mite - I had an infestation last summer and someone told me to dilute ***** fluid in a spray bottle and spray all the corners and base of the greenhouse which I did and I also do it regularly through the growing season being careful not to spash it my my plants.

Touch wood I havent seen any this year!

**Helgalush** · 08-07-2010, 10:44 PM

Oh thats interesting, my cuke leaves have been very yellow but I assumed I was under-watering rather than over-watering.

I've had about 3-4 cukes now from my plant but on two occasions there was a small bitter piece - not the whole thing - but a section. What causes the bitterness?

**Davyburns** · 14-07-2010, 07:47 AM

I'm not altogether happy about spraying ***** about in my greenhouse, are there any more good cures?

**bravo2zero** · 16-07-2010, 05:51 PM

Get the hose out every day and give the plants a proper misting. Red spider mite thrive in dry conditions, that should keep on top of them. Occasionaly i will miss watering the plants but instead give the inside of my polytunnel and greenhouse a good dousing in all the nook and crannies to dislodge any nasties lurking.

**Davyburns** · 20-07-2010, 07:08 AM

my cues leaves look just like TKs but I cant see any kind of infestation at all, could it be something else?

**Tomatoking** · 20-07-2010, 07:51 AM

DavyB

Cucumbers really hate to overwatered, so it could have been that, which then lead to a root problem and a loss of certain nutrients. As you see the plants in my picture has more a dry tissue type look, because the spiders sucked all the goodness out of them.
If yours is more just of a yellowing then as I said it could be a deficency.
Keep them moist by spraying with a hose in hot weather, this will also keep spider at bay, like has been said. Then just cut down on the watering.

Saying all that I am guessing here because i havent seen your plant.

I had a wilting cucumber a few weeks ago, which was the start of a root problem, I put a mound of earth at the bottom of the stem to encourage new root growth and did what I sugested above.
It was over 30 degrees yesterday and my cucumber is fine again now.

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Cucumber leaves going yellow

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