40 MASS. EXPERIMENT STATION BULLETIN 382 



percent in 25 days after treatment with Hormodin A (80 B T I units), 

 not at all without treatment (118). 



Vaccinium corymbosum, highbush blueberry. Propagation by hardwood cut- 

 tings is well described by Bailey and co-workers (4) and their paper 

 should be read for details beyond those given here. Cuttings 3 or 4 inches 

 long are made in late March, before buds begin to break, or they may 

 be taken earlier in the winter and stored cool in moist sphagnum until 

 spring. They are made of such of the previous year's growth as bears 

 no fruit buds and is not too weak, with the basal cut just below a bud, 

 the top cut just above a bud. They should be set so deeply in the root- 

 ing medium, sand-peat, that only the top bud is out of it. Untreated 

 hardwood cuttings which were taken here in mid-March rooted 100 per- 

 cent in sand-peat in the case of the varieties Rubel and Harding, 50 to 

 88 percent in the case of Adams, Jersey, and Pioneer. Their rooting 

 here, as elsewhere (54), was not improved by treatment with root-induc- 

 ing substances. 



Softwood cuttings taken in or about July (44, 53), are made with the 

 basal cut at or near the base of the current season's growth, with few 

 or no leaves removed (46). They should be set deeply in the rooting 

 medium, sand-peat. Rooting of June and July cuttings of Rubel was 

 improved by treatment with indolebutyric acid (20 to 40 mg./l., 24 hr., 

 or 2 to 5 mg./gm. talc) (49). Softwood cuttings taken here in July and 

 treated with indolebutyric acid (50 mg./l., 20 hr.) rooted in sand-peat 

 as follows: Jersey, 100 percent in 40 days; Cabot, 80 percent in 35 days; 

 Wareham, 77 percent in 27 days. Untreated cuttings rooted 50, 2>Z, and 

 42 percent. 



Vacciniufn Vitis-idaea, cowberry. Untreated cuttings which were taken 

 here in early August rooted more than 90 percent in sand-peat in 8 weeks. 

 Results were less good in sand or if cuttings were taken in late Sep- 

 tember. 



Viburnum. Spring and early summer is a good time to take softwood cut- 

 tings. Taken here in late June or early July, untreated cuttings of V. tomen- 

 tosum, V. rhytidophyllu)!!, V. fragrans, V. Sicboldii, and European cranberry- 

 bush rooted 80 to 100 percent. Hardwood cuttings of some species also 

 root well (67). Treatments with indolebutyric acid improve or at least 

 hasten rooting. Cuttings of V. Carlesii taken here in early June rooted lOO 

 percent in 7 weeks after treatment (20 mg./l., 18 hr.), 59 percent without 

 it. Rooting of late June cuttings of that species was hastened by 30 mg./l., 

 6 hr. (16). Concentrations may need to be increased if cuttings are taken 

 later in the summer (83), but rooting of July cuttings of the following 

 was improved by these treatments : V. tomentosum, 5 to 20 mg./L, 24 hr. ; 

 arrow-wood, 5 mg./l., 24 hr. (57); V. Sicboldii, 10 mg./l., 24 hr. ; European 

 cranberry-bush, 10 mg./l., 6 hr. (83). Also eflfective are 2 mg./gm. talc, 

 or, by the concentrated solution-dip method, 4 mg./cc. (49). Cuttings of 

 six species rooted better in sand-peat than in sand (14'). Sandy soil is 

 also good. Cuttings of V. Carlesii, untreated, rooted better in sandy soil 

 than in sand (27). Cuttings of hobble-bush taken here in mid-July and 

 treated with indolebutyric acid (50 mg./L, 20 hr.) rooted 67 percent in 

 sandy soil, 25 percent in sand. 



Vitex. Hardwood cuttings of chaste-tree taken here in late March, buried 

 in moist sand at about 50° F. for four weeks, and then planted outdoors, 

 rooted 79 percent without treatment, no better with it. Softwood, July, 

 cuttings of V. Negundo (var. incisa) rooted 64 percent in 22 days after treat- 



