Edit. After Black September's assassination of Israeli athletes at the Munich Olympics in 1972, Prime Minister Golda Meir okays a black-box operation to hunt down and kill all involved.
Yellow pollen is produced by evergreen trees, primarily pine trees, including spruce, true cedar trees, fir trees, larch and hemlock. Although yellow pollen looks like it could cause an allergic reaction, in reality it does not trigger allergy symptoms at all. It can stain the skin and clothing, however.
Bacterial Leaf Scorch. Bacterial leaf scorch can affect mulberry, among many other types of trees and shrubs. On mulberry, bacterial leaf scorch can cause yellowing between the scorched leaf margin and the leaf's healthy green tissue. The leaves of severely affected mulberry trees drop prematurely.