THE VINE IN MOROCCO. 775 



Phylloxerio Congress. — The members of the Interuatioual Phylloxeric 

 Congress, which had its session at Bordeaux, aflSrmed that they obtained 

 satisfactory results in their vineyards by submersion. 



The submersion, according to their opinion, gives luxuriance to the 

 wines, because water supplies phosphor and potash, both of which ele- 

 ments are indispensable to those plants, and of which elements much 

 is used up in the shoots, leaves, and fruits yielded annually, and sub- 

 mersion restitutes tLem in the proportion which is mixed with water. 



The submersion should be made by leaving the water standing in the 

 vineyard, as in this manner the phylloxera dies quicker by drowning for 

 want of air, because if the submersion is made through running water, 

 the current of which carries air with it, the insect is not destroyed. 



Phylloxera takes a longer time to die by submersion in winter, on 

 account of the slower evaporation of the water. 



Finally, submersion will always give good results if it brings to the 

 vine the necessary quantity of potash and phosphoric acid. 



These are the conclusions arrived at in the discussion sustained by 

 the vine-growers, who agreed on this point with scientific men, each side 

 of which brought forward their arguments. 



Felix A. Mathews, 



Consul. 



United States Consulate, 



Tangier April 2, 1884. 

 156a 25 



