34 



OREGON WALNUTS 



TREE PLANTING 

 Fig. 1. Not well planted. During 

 dry seasons nuts will not fill well, and 

 will be bitter. 



Fig. 2. Ground dynamited before- 

 planting, roots go down to permanent- 

 moisture. Drouth and famine proof. 



seriously, it is very serious on English roots, and even where 

 trees are grafted, if the union comes below the ground, it may 

 kill the tree at the point of union. On this account, on recently 

 cleared lands, it might be better to plant the trees with the 

 union exposed. The best known remedy is to scrape the dirt 

 away from the affected parts, clean off decayed portions, and 

 leave such portions exposed to the dry air for at least one 

 season. 



Crown gall has been reported in a few instances, but has not 

 been found to such an extent as to be thought serious. 



Shriveled meats is a problem which may have to be met. 

 This seems to be much more serious in California than in Ore- 

 gon. The shriveling, or drying up of the meats in the shell, may 

 result from a number of causes, such as poor pollination, too dry 

 soil, aphis attacks, or because the tree is so extremely late that 

 it does not have time to develop its fruit. 



Insects. 



About the only insects needing serious attention that so far 

 have appeared to attack our young walnuts are the San Jose 

 scale and the Aphis. Both of these pests are very easily con- 

 trolled and the same remedies that are used for our fruit trees 

 suffice to control these pests. 



