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Beginner Vegetables: white chalky spots on cucumber leaves

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Forum: Beginner VegetablesReplies: 6, Views: 54
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shawn47
Scottsville, KY

June 25, 2012
12:54 PM

Post #9180415

i have white spots on the leaves of my cucumber plant . the spots are white and chalky looking i am new to gardening and would be grateful for any help.

HoneybeeNC

HoneybeeNC
Charlotte, NC
(Zone 7b)

June 25, 2012
2:20 PM

Post #9180573

Have you had a lot of rain, or have you watered and got the leaves wet frequently? If so, your white spots might be powdery mildew. It could also be an infestation of mealy bugs, they resemble white powder sometimes, although I would not describe it as "spots".

A photo would be helpful...
shawn47
Scottsville, KY

June 25, 2012
3:44 PM

Post #9180664

i do get the leaves wet alot how would i get rid of the mildew
thank you so much

This message was edited Jun 25, 2012 5:54 PM

HoneybeeNC

HoneybeeNC
Charlotte, NC
(Zone 7b)

June 25, 2012
5:26 PM

Post #9180805

shawn47 - once powdery mildew arrives, it's very hard to get rid of. It likes cool, wet conditions.

First be sure you have powdery mildew. The leaves will have a greyish mold on them which will spread quickly. Remove all affected leaves and throw them in the trash (not the compost.)

When watering any vegetable, keep the water at the root zone. The worse thing that can happen to plants is that they get too much water.
shawn47
Scottsville, KY

June 25, 2012
5:39 PM

Post #9180832

does that include watermelon


This message was edited Jun 25, 2012 7:43 PM

HoneybeeNC

HoneybeeNC
Charlotte, NC
(Zone 7b)

June 25, 2012
5:46 PM

Post #9180845

shawn47 - Yes. Melons require more water than some other vegetables, but you should still keep the water off the leaves.

Melons, squash, and cucumbers are rather susceptible to powdery mildew. I used to live in South Florida and could never get them to grow there. I have the reverse here. It rains very little in the summer, and have more squash than we can possibly eat!

Ray_Der_Phan

Ray_Der_Phan
Oceanside, CA
(Zone 10a)

June 27, 2012
4:29 PM

Post #9183847

Rule#1 - Never get any veggie leaves we(purposely), you're just asking for problems.

This maybe helpful. I use a few different ones at different times.

http://www.johnnyseeds.com/assets/information/Fungicides.pdf

Is the mildew on top of the leaves or bottoms? If top, Powdery Mildew. If on bottom, Downy Mildew.



This message was edited Jun 27, 2012 4:32 PM

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