PROPAGATION OF TREES AND SHRUBS 41 



inent with indolebutyric acid, only 4 percent without it (83). Similar 

 cuttings of chaste-tree rooted 100 percent in sand-peat in i2 days after 

 treatment with indoleacetic acid (100 mg./l., 24 hr.) (87-). Sandy soil 

 is successfully used as rooting medium for both species (80, 106). 



Vitis, grape. Hardwood cuttings respond to treatments (130), although 

 less, at least in the case of Concord, than do greenwood, summer and 

 fall, cuttings. Hardwood, April, cuttings of Concord which had been 

 treated with indolebutyric acid (80 mg./l., 24 hr.) produced many n.ore 

 roots per cutting than did the untreated, and a concentration of 10 mg./l., 

 24 hr., had a similar effect on softwood cuttings (48). November cuttings 

 of that variety responded to 40 mg./l., 24 hr.; 2 to 10 mg./gm. talc; or, 

 by the concentrated solution-dip method, 10 to 25 mg./cc. (49). August 

 cuttings of muscadine rooted 44 percent in 3 weeks after treatment with 

 indolebutyric acid (20 mg./l., 20 hr.), not at all without it (125). 



Weigela. Hardwood cuttings of a hybrid which were taken here in late 

 March and immediately set in sand-peat in the greenhouse rooted 90 

 percent in about 9 weeks, with no benefit from indolebutyric acid. Soft- 

 wood, summer cuttings, usually root well in sand (14, 44, 105, 106). 

 There was good rooting of untreated cuttings of IV. Ronbunda taken from 

 June through September (44). Probably the best place for the basal cut 

 is above a node (106). Indolebutyric acid at least hastens rooting of 

 such cuttings. Late June cuttings oi W. florida rooted 72 percent in 20 days 

 after treatment (50 mg./l., 12 hr.), not at all meanwhile without it; and 

 August cuttings of a hybrid rooted 95 percent in one month after that 

 treatment, 30 percent without it (83). July cuttings of another hybrid 

 rooted 90 percent in 14 days after treatment with 20 mg./l., 24 hr. (57). 

 Equivalent concentrations of indolebutyric acid for October cuttings of 

 the hybrid Mme. Ballard are 10 mg./l., 24 hr., or 2 mg./gm. talc, or by 

 the concentrated solution-dip method 4 mg./cc. (49). 



Wisteria, wistaria. Softwood cuttings of Japanese wistaria which were 

 taken here in mid-July rooted 100 percent in sand-peat in 2 months after 

 treatment with indolebutyric acid (25 mg./l., 24 hr.), 80 percent without 

 it. July cuttings of Chinese wistaria, treated, rooted well in sand-peat 

 (68, 87). Fall cuttings of wistarias will also root, although slowly (124). 



Literature Cited 



1. Afanasiev, Michel. Effect of indolebutyric acid on rooting of green- 



wood cuttings of some deciduous forest trees. Jour. Forestry 

 37:37-41. 1939. 



2. Angelo, E. The use of chemicals in rooting raspberry leaf-bud cut- 



tings. Proc. Amer. Soc. Hort. Sci. 36 (1938):129-130. 1939. 



3. Anonymous. Stimulation of adventitious root formation by chem- 



icals. Nature 141:3558:88-89. 1938. 



4. Bailey, John S., Franklin, Henry J., and Kelley, Joseph L. Blue- 



berry culture in Massachusetts. Mass. Agr. Expt. Sta. Bui. 358, 

 20 pp. 1939. 



5. Bailey, L. H. The Standard Cyclopedia of Horticulture. New 



York. 1914. 



6. Barrows, F. L. Propagation of Epigaca r opens L. I. Cuttings and seeds. 



Boyce Thompson Inst. Contrib. 8:81-97. 1936. 



7. Bean, W. J. Trees and Shrubs Hardy in the British Isles. Lon- 



don. 1929. 



