Herbert, F.B. 1938 Municipal and county spraying.. Western Shade Tree Conference 5th: 61-69.
Notes: Among insects for which spraying is recommended are European elm scale, black scale, red scale, sycamore scale, oyster shell scale and mealybugs.
Herbert, F.B. 1938 Municipal and county spraying.. Western Shade Tree Conference 5th: 61-69.
Notes: Among insects for which spraying is recommended are European elm scale, black scale, red scale, sycamore scale, oyster shell scale and mealybugs.