Aster yellows can affect over 300 varieties of plants. They may be ornamentals or vegetables and span over 48 plant families. It is a common disease except in areas where temperatures are regularly over 90 degrees Fahrenheit (32 C.). A crop of spinach with aster yellows can rapidly decline, causing economic loss. Learn the signs and symptoms of aster yellows of spinach as well as treatment and prevention. Signs of Spinach Aster Yellows Spinach that is yellowed and stunted may have Aster
