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.
Most cucumber plants contain compounds known as cucurbitacins (âkyew-ker-BIT-a-sinsâ) that cause fruit to taste bitter. At low levels, you arenât likely to detect them. But high levels of cucurbitacins produce extremely bitter fruit. Some cucumber varieties possess a gene that inhibits their formation. âThe bi gene causes the entire plant to be bitterfree,â notes Todd C. Wehner, Ph.D., professor of horticultural science and plant breeder at North Carolina State University.