142 THE CONNECTICUT POMOLOGICAL SOCIETY. 



Professor Parrott calls attention to the fact that the fungi- 

 cidal value of these washes was recognized in California many 

 years ago, and among eastern experiences we may refer to that 

 of Professor Lowe, who, in 1902, reported that apple trees 

 sprayed with sulphur washes were quite free from apple scab, 

 while untreated trees were much affected, and in his work in 

 Niagara county peach trees sprayed with this wash were less 

 injured by leaf curl than others. Independent investigations 

 the same year by Professors Burgess and Parrott, demon- 

 strated that timely application of lime-sulphur washes con- 

 trolled leaf curl and this has been substantiated by our own 

 experience. Professor A. D. Selby, of the Ohio Station, 

 made an extensive study of peach scab in 1902, and believed 

 that applications of the wash proved of some value in pre- 

 venting this disease. 



Before discussing the later results obtained by Professor 

 Parrott, it will be well to outline briefly the method of spraying 

 commonly followed in our New York orchards. There is, first, 

 an application of poisoned bordeaux mixture before the opening 

 of the blossoms for the prevention of scab and the control of 

 bud-moth, case bearers, canker worms and other early leaf 

 feeding insects ; second, another just after the falling of the 

 blossoms, also directed against scab, various leaf feeding in- 

 sects and especially the codling moth, and a third spraying 

 with these materials is usually given a week or ten days later 

 for the control of the pests named above. 



Experiments conducted in 1904 by Professor Parrott in 

 collaboration with Professor Beach, are extremely interesting. 

 Their investigations were extensive, they having under experi- 

 ment 1,497 large apple trees, 2,822 pear trees, 348 cherry 

 trees and 1,359 phim trees. Owing to the absence of disease 

 no results, aside from the destruction of the scale and pear 

 blister mite, have been obtained upon the value of sulphur 

 washes for the treatment of the latter three fruits. Much 

 more definite results have been secured upon apple trees, and 

 the work is most promising, since these gentlemen obtained 

 further evidence of the . two-fold nature of these washes. 

 They have found that one application of a sulphur wash, sup- 

 plemented with the usual second and third sprayings of poi- 

 soned bordeaux mixture, result in controlling the scale, apple 



