SUBMERSION OF VINEYARDS. 209 



Eight ounces of this mixture are spread around each stump. 

 The mixture indicated on page 144 can also be used with 

 advantage. 



(C.) Ploughing. Ploughings should be frequent, and great 

 care should be taken in their performance, on account of the 

 settling resulting from the long duration of the flooding. 

 We must avoid ploughing when white frosts are feared, 

 on acount of the generally low and damp situations of vine- 

 yards submitted to submersion. 



Numerous sulphurings and sulphatings should be done 

 to prevent non-setting and to combat oidium, mildew, and 

 anthracnosis, which are frequent in such vineyards. 



These indications may be considered as summing up the 

 experiences of submersionists. 



10890. 



