Shot-hole borer control problem one of management
oleh: L Smith
| Format: | Article |
|---|---|
| Diterbitkan: | University of California Agriculture and Natural Resources 1947-11-01 |
Deskripsi
Late in the fall, in dry years, trees injured by the shot-hole borer are bedecked with large masses of gum which have been accumulating throughout the summer. The gum masses reach their greatest total just at the start of the fall rains.