A UV Camera Made it Clear to a U.S. Dept. of Agriculture Entomologist Why Insects Lick Brown Spots on Plants

FENELLA SAUNDERS at American Scientist interviewed Suzanne Batra recently. In that interview Mrs. Batra reminisced about how, one day while in the field, her husband noticed insects were coming and licking the brown spots on certain leaves. He asked her, “Why are they doing this?” “Of course my curiosity got going,” Mrs. Batra recalls. “Luckily,…