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.
Cucumbers affected by blossom-end rot develop a dark, almost black, discoloration on the end of the fruit where the flower was located. The area may also crack or become sunken. Fungal growth may also occur on the rotted portion because the cucumber becomes more prone to infection.