Table 3 — The Rooting of High Bush Blueberry Cuttings Taken July 15. 



Treatments 



Rooting 

 Media 



Percentage of Cuttings Which Rooted in the Num- 

 ber of Weeks Indicated 



Weeks 

 9 10 11 12 13 14 15 16 



Check (untreated) JSand-peat 



i^Sand 



Hormodin No. 2 Sand-peat 



Indolebutyric acid 



50 mg./l., 20 hr fSand-pear 



\Sand 



100 nig. 1., 5 hr JSand-peat 



\Sand 



a-Naphthaleneacetic acid 



12.5 mg./L, 20 hr Sand-peat 



25 mg./l., 20 hr /Sand-peat 



\Sand 



50 mg./l., 20 hr Sand-peat 



Potassium indolebutyrate 



25 mg./l.. 20 hr fSand-peat 



\Sand 



50 mg./l., 20 hr fSand-peat 



\Sand 



100 mg./l- 5 hr Sand-peat 



b-Indole-3-propionic acid 



25 mg./l., 20 hr Sand-peat 



50 mg./L, 20 hr fSand-peat 



iSand 



100 mg./l., 5 hr jSand-peat 



\Sand 



a-Naphthaleneacetamide 



4 mg./gm. talc Sand-peat 



b-Naphthoxyacetic acid 



25 mg./., 20 hr Sand 



8 8 16 16 16 36 40 40 48 



16 24 40 40 40 40 40 40 64 64 68 



20 28 36 52 56 56 56 56 60 60 64 



20 32 60 76 76 76 80 



8 24 24 52 52 52 56 56 56 60 60j64 



32 40 48 56 56 56 64 64 72 72 76 



40 40 52 52 64 64 64 72 72 76 76 



32 60 60 76 76 76 80 



28 56 64 80 SO 80 84 



24 48 ^8 68 76 76 76 76 80 80 84 84 



28 52 56 72 72 72 72 80 



16 24 44 64 76 76 80 92 



16 16 56 64 80 80 80 84 84 84 92 



32 48 76 88 



48 64 80 84 84 84 84 84 92 92 92 



24 36 48 72 76 76 84 92 



72 76 80 88 88 88 88 92 



72 76 76 80 84 84 84 88 



48 56 60 68 68 68 68 68 68 68 72 80 



44 64 84 96 



40 48 56 72 SO 84 84 84 84 84 88 92 



12 12 12 12 60 60 60 60 64 64 68 

 40 40 52 56 72 80 84 



Figures in boldface are percentages which had rooted when no unrooted cuttings remained. 



Rooting was hastened by b-naphthoxyacetic acid in the last experiment, but 

 indolepropionic acid gave even better results. Rooting in the experiment which 

 began July 8 was hastened by a-naphthaleneacetaniide 4 mg./gm., talc (8 mg./gm. 

 talc was injurious) in sand-peat, but Hormodin No. 1 was more effective in 

 that experiment and, as is shown in Table 3, several treatments w-ere more effec- 

 tive in the next. 



There was no one treatment which was always superior to all others in hasten- 

 ing rooting, increasing total percentages which rooted, and improving the root 

 system. The response was affected by the stage at which cuttings were taken 

 and by the choice of rooting medium; but in all experiments, in both sand and 

 sand-peat, cuttings responded to treatment with some root-inducing substance. 

 These are now named in order of excellence, the best first. 



