214 



SLUGS, FLUKES, EELWORMS, ETC. 



or sometimes as " Sagging," because the lower part of 

 the infested stem of the Oat plant is often swelled like 

 a Tulip- bulb, and also the leaves of the plant are often 

 waved at the edges, and thickened like those of the 

 Sedge, hence the term of segging or sedging. In Car- 

 nations the term "Pine-apple disease " has been given 

 to the effects of this infestation, consequent on it so 

 altering the method of growth as to cause the infested 

 shoots to resemble the top of a Pine Apple. In the 

 case of the alteration of the shape and colour of Wheat 



Fig. 157. — Wormlets escaping from eggs ; section of Purples, False- 

 Ergot, or Cockle-gall, with wormlets within ; after Brauer's figs, 

 (much magnified). Spikelet of Wheat, with galls (magnified). T. 

 tritici wormlet (greatly magnified). Nat. length of largest one-seventh 

 to one-fourth inch. 



grains from presence of another kind oiTijlencJnis (the 

 T. tritici, see Fig. 157), the names of False Ergot and 

 Purples are amongst those given to the attack ; and 

 in the case of a very peculiar growth, resembling 

 nothing so much as a little Cauliflower, which is formed 

 on Strawberry plants, consequent on the presence of 

 two newly observed species of Eelworms of the genus 

 ApheUnclms, the name of Cauliflower disease has been 

 chosen to distinguish the attack. 



This principle of naming is of considerable practical 

 importance. Where an English name is, or can be,. 



