'^>0 Stcni-diMase com^eff fi// the Eclworm 



If he wishes to avoid Stem disease lie should not sow red clover, 

 fow-ijrass or alsike clover, but should make use of trefoil, lucerne, 

 sainfoin or a larjje white clover, such as Sutton's Mammoth White. 



Recommendations similar to the above liavc been made before, 

 notably by Amos (J919, p. 9), but they are so obviously the proper and 

 hopeful lines to adopt that they will bear repetition and reiteration. It 

 is no use attemptino; to fiet rid of the eelworm disease if red clover, cow- 

 grass, alsike clover and kidney vetch are sown on infected land. 



RKrKRK.XCKS. 



(1) Amos, A. (191 it). Tlu: IJitliculties of growing lied f'lovor — Clover .Sieknes.s iiiul 

 other Causes of Failure. Journ. Roy. Agr. Soc. Eng. 79, pp. 68-88. 



(2) Byars, \j. p. (1920). A Xematode Disease of Red Clover and SIrinvherrv in llie 

 Pacific Nortli-we.it. I'liyloprithologi/, 10, No. 2. p. III. 



(:!) Cotton, A. I). (1020). Clover Stem Rot (Sclfrnliiiia Irifolionim ICrik.). Juxrt). 

 Ministry of Aiji: 26. \o. 12. .March, pp. 1241-1244. 



(4) KiJHN, J. (18S1 ). Das Lii/.crn;ilehcii (Tylenrhii-i HiireiiMernii). Deiilsche hinthr. 

 Prexxe, 8, p. ,S2. 



(5) IVIarcinowski, K. (1009). Parasitiseh und semiparasitiseh an I'llanzeii lebeudc 

 Nematodeii. Arbe.iten mm der Kaiseriirlien liioh(jisclien Aiiiloll fiir Land- iiinl 

 Forslimrt.schiiJ'1, 7, Heft 1. jip. 5()-()7. 



(()) Ormerod, E. .a. (1887-1899). lieporls on Injurious In.sect,i. 



(7) ]ilTZERLV-Bos, .1. (1892). L'.Vngiiillule de la Tige (Tylenchus ilenislalri.r Kidin), 

 etc. Archives dn Musee Teyler, Haarlem, 3, p. 161 and p. .545. 



(8) Smith, R. H. (1919). A Preliminary Note concerning a Serious Nematode Di-sea-sc 

 of Red Clover in tlie Xorth-western States. Journ. Econ. J'Jiit. 12, So. ti. pp. 460- 

 462. 



KA'PLANATION OF I'LATI-; I. 



Fitl. 1. Photograph nf pni-tinns ol jilanl iif icd clover suffernitr from Stem disease ea\iaed 

 in' Tyhnclms dipsaci, showing; the cjiarat'teristieally swollen ir;if stalks ixntX stipules 

 at .1 and B. 



Fill. 2. Photograph of a whole plant of red clover suffering from Foliage-rot caused by the 

 fungus Hclerotiniii Irifolionim. The white mycelium oau he .seen spreading on to the 

 surface of the .soil, whilst tlw eollap.sed nature of the leaf and leaf-slalks is well shown. 



[Received September Gth, 1021. 



