1920.] 



Clover Stem- rot. 



1241 





JOIQ 

 J. y. 



igiS. 



JOT"? 

 J y-i J. 





cwt. 



cwt. 



cwt. 





2,967,284 



4^0,169 





Pears . . 



372,799 



2,436 



718,928 



Plums . . 



88,291 





409,877 



Cherries 



19,121 



50 



62,267 



Strawberries . . 



c Rot 





1 5»^4° 



Currants . . 





1,981 



108,691 





J 6, 90 6 





8,086 



gretables. — 



Import of 



Vegetables. 







igig. 



1 91 8. 





Potatoes, cwt. 



988,879 



1,015,793 



9,4^7,316 



Onions, bush. . . 



6,931,635 



4,342,586 



9,105,164 



Tomatoes, cwt. 



1,306,368 



516,412 



1,582,986 



The bulk of our supplies of potatoes came from the Channel Islands 

 (744,963 cwt.), with the Netherlands second, and France third. The 

 potato harvest in England and Wales in 1919 amounted to 2,733,000 tons, 

 which, although 1,476,000 tons less than in 191 8 (by far the largest crop 

 recorded) is 50,000 tons more than the pre-war average. 



The importation of hops recovered from 52 cwt. in 1918 to 154,453 

 cwt. in 191 9, as against the 191 3 figure of 262,184 cwt. The values 

 were: — 1919, ;^2, 374,115 ; 1918, £210; and 1913, /i, 753,003. The 

 United States has remained the principal country of import. The 

 total production of home-grown hops in 191 9 amounted to 194,000 

 cwt., which is half as much again as that of last year, but only about 

 less than half of the pre-war average. 



CLOVER STEM-ROT. 



[Sclerotinia trifoliorum, Erik.) 



A. D. COTTOX, 

 Mycologist to the Ministry of Agriculture and Fisheries. 



The fact that Red Clover, if grown repeatedly- on the same 

 land, suffers from " Clover Sickness " has been common 

 knowledge for more than a century. For many years the 

 nature of this malady was a matter of speculation, but the 

 work of various investigators has shown that it is due to at 

 least two distinct diseases, the one caused by the eelworm 

 Tylenchiis dcvasiatrix, and the other by the fungus Sclerotinia 

 trifoliorum. In spite of this, however, it is only quite recently 

 that the symptoms of the two diseases have been generally 

 recognised and the appropriate methods of treatment adopted. 



The most recent work* shows that amongst leguminous 

 crops species susceptible to one disease are not necessarily 



• See Amos, A., Jour. Roy, Agric. Sac. England, Vol. 79, pp. 68-88. 



