SHOOT GROWTH OF GREEN GAGE PLUM IN RELATION WITH PHASES OF BIENNIAL BEARING
On the contrary, complete blossom or fruitlet removal generally brings a very important increase of shoot length (CHANDLER, 1925; BOWMAN, 1941; MAGGS, 1963; BARLOW, 1966) whereas increases floral induction when this considerable treatment is made in "on" year on alternate bearing trees (GOURLEY, 1915; AUCHTER, 1919; ROBERTS, 1920; BAILEY, 1928; READ, 1931; ALDRICH and FLECHTER, 1932; McCORMICK, 1933; ALDRICH and WORK, 1934; HOBLYN et.al,1936; BOBB and BLAKE, 1939; FISHER and BRITTON, 1940; HARLEY et al. 1942; BROWN, 1942 - on apple trees; BOWMAN, 1941 - on plum-trees; HODGSON and AGGERS, 1941 - on orange-trees; FISHER, 1951 - on apricottrees).
Therefore, a contradiction exists:
- tendency for strong growth associated with low initiation ("normal on year");
- strong growth associated with important initiation ("artificial off year" by blossom or fruitlet removal).
We have tried to give accurate details of these facts,