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.
Erwinia tracheiphila affects only certain members of. the cucumber family including cucumber, squash, muskmelon, pumpkin, and gourd. Watermelon is. immune and certain varieties of cucumber and. squash show varying degrees of resistance to this dis-. ease. Bacterial wilt causes losses of 10 to 20 percent in. unsprayed plantings of susceptible cucurbits. Introduction. Figure 1: Symptoms of yellowing, wilting and dieback of the.