Scab, a plant disease; also, the roughened crustlike area on the plant surface resulting from the disease. The disease is caused by various parasitic fungi, each of which usually infects only one kind of plant. Agricultural commodities susceptible to the disease include apples, avocados, barley, cucumbers, peaches, pecans, potatoes, and wheat. Spraying with fungicides and the use of disease-resistant varieties are common methods of prevention and control, but scab is difficult to control once it has taken hold.
You Might Also Like
Atmosphere, the mass of gases surrounding a planet or any other celestial object.
Whether you invented a revolutionary pair of skivvies or a way to turn cow manure into vanilla flavoring, we have an award for you. The Ig Nobels are proving that science isn't all seriousness and superstring theory.