https://ipm.missouri.edu/meg/2017/4/elderberryrust/
Elderberry Rust Defoliating Plants // Missouri Environment and Garden News Article // Integrated...
Bright orange rust pustules are now evident on leaves, stems, and petioles of elderberry plants. These symptoms are caused by the fungus, Puccinia sambuci. In...
garden newselderberryrustplantsmissouri
https://scholars.lib.ntu.edu.tw/entities/publication/843d2ece-984c-4511-a9a1-e7ec2f016729
Some Physiological Studies on Defoliating Disease of Citrus Caused by Gloeosporium Foliicolum