72 FUNGOID DISEASES 



3. Keep down weeds which may act as food 

 when other plants are lacking. 



4. Dig over diseased spots deeply and apply 

 carbon-bisulphide. 



5. Grow cereals on the land for a year or two. 



6. Remove all diseased parts where this is prac- 

 ticable. 



(See "Journal of the Board of Agriculture," Vol. 

 12, No. II. Tubeuf, p. 219. Minnesota Plant 

 Diseases, p. 329. Massee, p. 345.) 



VI. Other Diseases of Lucerne and Clover. 



(a) Disease of Crown of Roots [Uropklyctis 

 alfalfce). Class : PHYCOMVCETEiE ; Family : Clado- 



CHYTRIDIACE^. 



The above fungus has caused much harm to the 

 lucerne crops on the Continent, and was identified 

 by Salmon on lucerne sent to him, which was 

 ofrown in the Eastern Counties. The funofus 

 causes wart-like outgrowths at the crown of the 

 roots, which consist of hypertrophied tissue. In 

 these swellings there are minute pits in which the 

 spores of the fungus are found. 



Very little is known as yet as to the method of 

 infection, and in consequence preventive measures 

 cannot be recommended. 



{b) Diseased seeds {^Macivsporium sarcincBforme\ 

 — Fungi Imperfecti ; Order: Moniliales. 



This fungus, which has been known for some 

 time to cause considerable damage to the leaves 



