The Canadian Horticulturist. 



TREATMENT OF APPLE SCAB. 



' ft 



,/-. m ■ 



m 

 1 



)NTINUING our plans for spraying for 1893, 

 see page 9, we may notice the following 

 recipe for the Bordeaux mixture, given by 

 Prof. Panton, of Guelph, viz.: 4 lbs. copper 

 sulphate, 4 lbs. of lime, 

 and 50 gallons of water- 

 This is to be applied just 

 before the blossoms open. 

 When the fruit is well form- 

 ed, spray again with the 

 same, and three or four 

 ounces of Paris green, re- 

 peating again at intervals if 

 possible. The Bordeaux 

 mixture is also commended 

 for brown rot of cherry, 

 plum and peach, for pear- 

 leaf blight, mildew of the grape, cane rust of the raspberry, etc. Too much 

 importance cannot be attached to early applications. These all are for use 

 when the foliage has appeared ; before that, sulphate of copper, one pound to 

 twenty-five gallons of water, may be used to cleanse the bark, buds, and twigs of 

 any spores of fungi, which are lodged about in waiting for their destructive 

 operations. 



In this connection it will be interesting to read the following notes from 

 the Ohio Experiment Station : 



The heavy and continued rainfall, during the spring and early summer of 

 1892, is thought, by many, to be the direct cause of the failure of the apple 

 crop. No doubt this was true in many cases, as when heavy rains occur at the 

 time of blooming the pollen may be washed away, and pollenization prevented. 

 The bees, not being able to fly at such times, cannot visit the blossoms, which 

 fact alone is sufficient to account for the crop failure, in a great measure. 



The opinion has been held by a few that unfavorable weather is not, in all 

 cases, the direct cause of failure, and some experiments carried on by the Ohio 

 Experiment Station strengthen this opinion. An orchard of Newtown Pippins, 

 of nearly two hundred trees, was divided off into plots, none of the plots con- 

 taining less than one row, and some as many as four. Several compounds were 

 used, but the fact that some adhere to the foliage better than others render com- 

 parison out of the question, nor is this matter of any importance in this 

 connection. 



