552 



DISEASES OF CULTIVATED PLANTS 



to perform its function of supplying water to the above-ground 

 portion of the plant. 



The following measures for sterilising soil and checking 



Fig [68. Heteroderat vorni), ling galls in 



tomato root ; slightly re 1 



the disease, are recommended by the Board of Agriculture, 



in Leaflet No. 75. 



1. To destroy these eelworms the soil must be thoroughly 



