Root nematode. 99 



most effective remedy known, for Thrips, Greenfly and Red 

 Spider; but there will be some so secreted they cannot be reached 

 without successive applications. 



ROOT NEMATODE {Hiterodera Radicicola.) 



This disease was first noticed in 1885. Symptoms are a 

 browning and shriveling of the plant's tissues, usually on one 

 side, from below upward, involving finally the death of the whole 

 plant. On the medium size roots may be found galls, about an 

 eighth of an inch in diameter, and these little galls, or nodules, 

 contain the eggs of the Nematode, which hatch into worms, that 

 migrate to fresh roots and repeat generation. Prof. Atkinson at 

 first described the pathology of this disease. Fortunately it is not 

 very common, and is most likely to occur in soil taken from un- 

 der trees, or near hedges. 



REMEDY. 



The only remedy suggested is sterilizing the soil before it is 

 put on the benches, by steam heat, to a point that would destroy 

 all germs of this life. 



