LEAFHOPPER TRANSMISSION OF WITCHES' BROOM AND CLOVER PHYLLODY VIRUSES FROM BRITISH COLUMBIA TO CLOVER, ALFALFA, AND POTATO

摘要

The leafhoppers,Scleroracus dasidusMed. andScleroracus balliMed., transmitted witches' broom virus from clover and alfalfa to clover, alfalfa, and potato; and from potato to clover, but not from potato to potato. Where flowering parts occurred, they appeared normal.The leafhoppers also transmitted clover phyllody virus from clover to clover, in which it caused phyllody, and to potato, in which it caused symptoms of witches' broom. Scions of these potatoes infected with clover phyllody virus grafted to tomato produced the same symptoms as a phyllody-inducing strain of potato witches' broom virus.