"Whitefly-borne diseases of plants cause great concern in many tropical areas ... The fact that s, s, s, and other edible , which are primary sources of protein for the diet of many people in the Tropics, fall prey to some of theses agents have prompted local governments and international agencies to institute programs for their study and control ..."
January 1, 1970
https://en.wikiquote.org/wiki/Whiteflies