Q.Lemon cucumber leaves covered w/ blackish “dust”
What is the cause/cure of the darkish “dust” on the lower leaves of my lemon cucumber vine?
kh0001
Answered on July 30, 2016
Sounds like your cucumber plants have a case of what's known as "sooty mold," which means you have one of any number of common pests attacking your vine.
This article will help you get rid of the pests, if that's in fact what it is:
https://www.gardeningknowhow.com/plant-problems/disease/how-to-get-rid-of-sooty-mold.htm
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