30 
1937 (August), indicating that they were made prior to our own 
publication. 
Table Showing Growth of a Few Best Hybrids 
Height 
Year When 
Nut Was Name Number 
P ee 1936 1937 
ft il it in 
1931 EXT ROE =<chen eee x dentata H&6-31 14 10) | 19* 
“ H94-31 9 6 | 11 4 
= Winthr op —crenala x dentata W40-31 9 13 
“ Sm nit th S170C-31 10 6 | 13 6 
os — ‘ - $200B’—31 | 10 11 6 
i — . $239-31 10 9 | 14 
1932 ue ne = 110-32 9 10 | 13 
1933 Minturn — ‘° re M19’-33 8 | 11* 
- Hammond “ ~ H118A’-33 |} 6 1 10 
1934 S8 X cr 9B-34. 3. OS 5 10 
- see stma oS Segutnit 20-34 3. 44 4 8 
1935 dentata XS8 L160B-35 2 4 5 
S8 X dentata 40- 1 9 5 2 
* Year’s growth, more than four feet. 
Inoculation Tests for Disease Resistance.—In our last report we 
told of inoculating all our trees, both hybrids and species, with 
the blight fungus to get a definite idea of the relative resistance 
or susceptibility of each individual. We have continued with 
this work in 1937 and have developed a system of marking the 
trees on their performances as follows: 
Immune (100% resistance) —White Label 
Shght susceptibility to fungus, i.e. mycelium grows a little in 
bark, but no fruiting bodies are formed nor is branch killed 
(75% resistance)—Green Label 
Susceptibility and resistance about half and half. No fruiting 
bodies formed but mycelium grows well in bark. Branch 
still alive at end of first year. (50% resistance)— Yellow 
Label 
Susceptibility more pronounced, fruiting bodies formed in bark. 
Branch (to 34 inch diameter) killed by end of first year. 
(25% resistance)—Orange Label 
Susceptibility at a maximum, fruiting bodies quickly formed, 
