A disease affecting barley, caused by the fungus Helminthosporium teres and characterized by the formation of brown, irregular, netlike blotches on the leaves.
Origin
Early 20th century.
Definition of net blotch in US English:
net blotch
noun
A disease affecting barley, caused by the fungus Helminthosporium teres and characterized by the formation of brown, irregular, netlike blotches on the leaves.