PROPAGATION OF TREES AND SHRUBS 



33 



Rooting of Cuttings of Rhododendron 



Species and Time of 

 Taking Cuttings 



Indolebutyric 



Acid 



Treatment 



Rooted 



with 



Treatment 



Rooted 



without 



Treatment 



Lit. 

 Cit. 



Percent Days Percent 



Days 



R. arhorescens 



Late June 80 mg./l., 4 hr. 



Latp May 12 mg./gni- * 



Mid-July 5 ing./gm. * 



Jl. calendulaceum 



I^ate May 12 nig. /gm. * 



Early Jiily 50 mg./l., 16 hr. 



R. canadense 



Early July 50 mg./l., 20 hr. 



JR. canescens 



Late June 12 mg. /gm. * 



Hormodin A 

 Jl. CoUettianum 



Late June 12 mg. /gm. * 



R. dauricum 



Mill- July 5 mg. /gm. * 



Jl. gandavense 



Late June 60 mg./l., 8 hr. 



R. f^andavense (hybrids) 



Early June 12 mg. /gm. * 



Jl. hursutum 



Mid-August 30 mg./l., 24 hr. 



Jl. micranthum 



Late July 10 mg./l., S hr. 



Jl. minus 



Late November 75 mg./l., 16 hr. 



R. mixtum 



Late June 90 mg./l., 10 hr. 



Jl. molie 



Mid-July 2 nig. /gm. * 



R. mucronatum 



Late Mav 2 nig./gm. * 



Mid-June 30 mg./l., 4 hr. 



R. mucTonulatum 



Early July 50 mg. /I., IS hr. 



Late June 12 mg. /gm.. * 



R. nudijiorum 



Late June SO mg./l., 4 hr. 



R. ohtusum (varieties) 



Early June 70 mg./L, 20 hr. 



Late June 2 mg. /gm. * 



Hormodin A 

 R. ohtusum var. japonicum 



Late June 2 mg./gm. * 



R. ohtusum var. Kaempjeri 



Early July 50 mg./l., 4 hr. 



R. ponticum „ „ , , 



Late June 40 mg./l., 24 hr. 



R. pulchrum ,, „ _ , 



Late July 90 mg./L, 24 hr. 



R. Tcticulatuni 



Late July 40 mg./l., 8 hr. 



R. roseum 



Mid-July 12 mg./gm. * 



R. Schlippenbachtj 



Late May 12 mg./gm. * 



R. Vaseyi 



Late June 2 mg. /gm. * 



Late June 10 nig. /I., 8 hr. 



R. viscosepalum 



Late July 25 mg./l., 6 hr. 



R. viscosum 



Earlv June 15 mg./gm. * 



Late July 90 mg./l., 4 hr. 



R. yedoense var. pou^hanense 



Mid-July 2 mg./gm. * 



Late July 50 mg. /I., 20 hr. 



* Tn talc. ** Work done here. 



63 Same, but better 

 roots 



100 

 100 



75 

 100 



75 

 100 



50 



100 



100 



75 



90 



100 



50 



80 



50 



100 

 70 



100 

 75 



73 



93 

 100 

 100 



100 



85 



80 



100 



100 



50 



75 



75 

 60 



100 



50 

 100 



100 

 100 



45 

 83 



54 

 80 



50 



92 

 42 



61 



53 



70 



47 



80 



91 



150 



147 



68 



33 

 73 



87 

 46 



62 



49 

 37 

 49 



34 



45 



63 



35 



35 



68 



76 



76 

 105 



52 



47 



22 

 64 



2 5 

 



25 

 50 



27 





 30 





 25 

 80 





 90 

 60 





 20 







100 

 10 



74 

 



56 



86 



25-75 



56 



100 



85 



80 



100 



100 













 30 



45 

 33 



54 

 80 



92 

 42 



61 



53 



105 



47 



96 



91 



150 



147 



68 



33 



73 



110 

 46 



63 

 37 

 49 



112 



50 



56 



68 



76 



76 

 105 



90 



47 



100 (but more 

 slowly) 



25 2 2 



12 60 



125 



61 

 61 



61 



118 



61 

 61 

 90 

 61 



61 



61 



125 



61 



125 



90 



61 



117 



61 



125 



88 

 S8 

 88 

 61 

 61 

 61 



