Labor Day 2016. Labor Day is an annual holiday to celebrate the economic and social contributions of workers to the strength, prosperity, and well-being of the country. In the United States, Labor Day is a federal holiday observed on the first Monday of September.
Quick Answer. Cucumber leaves often turn yellow because they are damaged by the potato leafhopper. The small leafhoppers pull sap from cucumber leaves and inject a toxin into the leaves, causing them to turn yellow or brown and appear burned. Continue Reading.
Nutrient deficiencies sometimes result in yellowed leaves. A nitrogen, magnesium or sulfur deficiency may cause yellowing of leaves on pepper plants. Signs of a nitrogen deficiency begin with yellow leaves at the bottom of the plants, and the yellowing travels upward. New leaves may appear light green or slightly yellowed, and growth typically slows.