614 Journal of Agriculture. Victoria. [10 Oct., 1917. 



under these conditions, when the vine viust he grafted somewhat below 

 the surface, the scion root difficulty can be overcome, but at the cost of 

 a little extra work and attention. If carefully suppressed a couple of 

 times during the first year, and again during the second year, the union 

 will be sufficiently perfect for there to be little tendency for the forma- 

 tion of scion roots later on. Nevertheless it is well to keep any grafts 

 which have had to be executed below surface level, under observation for 



Fig. 8. — The Danger of Scion Roots. 



[Eeproduced from Bulletin No. 180, University of California Publications, I{ei.iUint 

 Vineyards, by Professor Frederic T, Bioletti (redrawn after Viala and Ravaz).J 



A. — Evil resiilts of allowing the scion to form roots of its own. The scion 

 roots (S) growing from ahove the graft (U) are strong, whilst the resistant 

 stock (R) is stunted and worthless. 



B. — A normal grafted vine, which has not heen allowed to grow scion roots. 

 The slightly larger diameter above the point where grafted (U) is usual with 

 most resistant stocks. 



a few years. A distinctive mark in the shape of a short stake, prefer- 

 ably painted white, or a loose wire collar round an arm of the vine, 

 will permit regular inspection with a minimum waste of time. 



Treatment of Gr.vfts which have Failed. 



Even though the graft may have failed altogether, the stock, if alive, 

 is not lost. It may yet be converted into a vigorous and fruitful vine. 



