1910.] Injury to Foliage by Bordeaux Mixture. 103 



also in order that the hops may keep better, they are tightly 

 pressed into cylindrical "pockets" or bags, 6-7 ft. long and 

 2 ft. in diameter. 



In packing, great care must be taken to see that the hops 

 in each pocket are uniform throughout. When parts of two 

 or more oastings of hops are to be packed in the same pocket, 

 they must be thoroughly mixed before packing begins ; if this 

 is not done, the pocket will be "streaky," and be rejected by 

 the purchaser. 



INJURY TO FOLIAGE BY BORDEAUX MIXTURE.* 

 E. S. Salmon, F.L.S. 



Mycologist to the South- Eastern Agricultural College, Wye, Kent. 



Although the use of Bordeaux mixture as a regular 

 spray for apple trees to keep off fungus diseases has 

 only lately been brought to the notice of fruit-growers 

 in this country, it must be remembered that in other 

 countries this wash has been in general use by the commercial 

 grower for a considerable number of years. As Mr. Pickering 

 has recently pointed out,f "Bordeaux mixture has practically 

 superseded every other fungicide for general use, and two or 

 three sprayings with it have become part of the annual routine 

 of the fruit-grower in most countries except our own, whilst 

 in viticulture its use is quite indispensable, and potato- 

 growers are applying it more and more every year." It is 

 not surprising, therefore, that there exists already in other 

 countries a considerable literature on the subject of the effect 

 of spraying with Bordeaux mixture in different seasons. On 

 looking through this literature we find that in all the coun- 

 tries where Bordeaux mixture has been in general use for a 

 number of years for spraying apples on a commercial scale, 

 reports have been published from time to time recording the 

 occurrence of a certain amount of injury resulting from spray- 

 ing in certain seasons. Such injury has been termed vari- 

 ously " Bordeaux injury," "spray injury," "scald," "burning," 

 "spray russeting," "cork russeting," and "yellow leaf," 

 and has been reported from most of the apple-growing dis- 



* See "The Making and Application of Bordeaux Mixture, " Journal, Jan. 1910. 

 t Journ. Agric. Science, iii, 170 (1909). 



