In Sand- Peat 



In Satid 



Experiment 1 

 (July 1) 



Experiment 2 

 (July 8) 



Experiment 3 

 (July 15) 



Indolebutyric acid 

 25 mg./l-, 17 hours 



Naphthaleneacetic acid 

 12.5 mg./l., 22 hours, or 

 50 mg./I., 5 hours 



Hormodin No. 2 



Hormodin No. 1 

 a-Naphthaleneacetamide 

 4 mg./gm. talc 



Indolepropionic acid 

 100 mg./l., 5 hours, or 

 25 mg./l., 20 hours 



Potassium indolebutyrate 

 50 mg./l., 20 hours 



Indolepropionic acid 

 50 mg./l. , 20 hours 



Indolebutyric acid 

 100 mg./l., 17 hours 



Hormodin No. 3 



Naphthaleneacetic acid 

 12.5 mg./I., 22 hours 



Hormodin No. 3 

 Indolebutyric acid 

 50gm./l., 22 hours 



Indolepropionic acid 

 100 mg./l., 5 hours 



Potassium indolebutyrate 

 50 mg./l., 20 hours, or 

 25 mg./l., 20 hours 



Especially noteworthy were the results obtained with potassium indolebutyrate 

 and indolepropionic acid, particularly the latter, when applied to cuttings taken 

 in mid-July. With these cuttings, made of wood too old to root well without 

 treatment, indolepropionic acid gave better results than either indolebutyric 

 or naphthaleneacetic acid. At the end of five weeks, when untreated cuttings had 

 not even begun to root, there was 40 to 72 percent rooting of cuttings treated 

 with indolepropionic acid (see Table 3), and excellent root systems had already 

 developed (see Figure 1). 



Hormodin No. 3 gave good results in sand but Hormodin No. 1 or No. 2 is 

 safer in sand-peat. Cuttings set in sand-peat on Juh' 1 rooted well without 

 treatment and, under these circumstances, Hormodin No. 1 and No. 2 were 

 about equally, although not strikingly, effective in hastening rooting. In the 

 experiment which was begun July 8, there was more response in sand-peat to 

 Hormodin No. 1, and in the last experiment cuttings were apparently too old 

 to respond markedly to either. 



Naphthaleneacetic acid 12.5 mg./l., 17 or 20 hours, gave good results in sand- 

 peat but not so good as did some of the other root-inducing substances. There 

 was no evidence that it is superior to indolebutyric acid for use with softwood 

 cuttings of blueberry. 



With cuttings in sand-peat, indolebutyric acid 25 mg./l., 17 hours, gave good 

 results in the first experiment, but in the second experiment, the same treatment 

 continued for 22 hours caused injury. Cuttings in the third experiment, a little 

 less soft, were uninjured by indolebutyric acid 50 mg./l., 20 hours, and their 

 rooting was hastened although less than by indolepropionic acid or potassium 

 indolebutyrate. With cuttings In sand, indolebutyric acid 100 mg./l., 17 hours, 

 was of benefit in the first experiment, 50 mg./l., 22 hours, in the second. No 

 treatment with indolebutyric acid in the third gave results equal to those obtained 

 with some of the other treatments. 



There was good and immediate growth of both roots and new shoots when 

 rooted cuttings were transplanted to a mixture of equal parts of sand, peat, and 

 loam or a mixture of equal parts of sand and peat. Cuttings which rooted last 

 or which failed to root by mid-October showed signs at that time of approaching 

 dormancy, their leaves falling or changing to red and yellow in color. Cuttings 

 which had rooted earliest were still green and making new shoot growth in the 

 greenhouse November 1 (see Figure ?). 



