SPRAYING FOR APPLE SCAB. 



Ill 



SPRAYING FOR APPLE SCAB. 



(Extract Truin Del., ''X>, llulk'tiiinf IJol. A^t. i;.\|jL'riim.iit Station.) 



After givino^ in detail the process and results of certain ex- 

 periments to overcome the apple scab on the place of S. H. 

 Derby. Woodside. Del.. Prof. F. D. Chester summarizes the 

 results and gives directions as follows: 



RESULTS OF SI'RAYIXG APPLE TREES— UPON THEIR GENERAL CON 



DITION. 



A notable effect of the season's work was the protection which the 

 spraj'ing- offered a<^ainst diseases of the wood and foliage. 



The (general condition of sprayed trees was better than that of the 

 imspraj-ed both as to vigor of growth and densitj' of foliage. This 

 favorable condition also persisted later into the season. On October 

 18th, I found that those apple trees which had received but a single 

 spraying were entirely defoliated, while those treated four and five 

 times were still clothed with leaves. A further good effect was 

 noted in the general condition of the buds on the sprayed trees, 

 seen on October ISth. On the sprayed trees the buds were mark- 

 edly larger and more vigorous. 



On October 4th, >Ir. Derbj' wrote, "The indications are for com- 

 plete success for the spraying for scab, and, further, the condition 

 of the trees as to next year's fruit buds and 'staj'ing on' of the leaves 

 makes the experiment satisfactory to me, the russeting of the fruit, 

 undoubtedly from the action of the spray, being the only drawback." 



Pic ,_.\ shows a hypothctic.il .Strawberry apple free of scab. 



B shows the relative size of a badly scabbed apple of the same viirielv 



OE.NERAL DIK'KCTION.S FOR .SPRAYIXO APPLES. 



Regarding the cost of spraying apples, Mr. Derby has estimated it 



for material and labor at about tencetitsper tree for five epraj'ings. 



In spraying apples we would recommend the course pursued by 



Mr. Derby in this experiment. Use the Bordeaux mixture, (J^ D) 



made up as follows: 



Copper Sulphate 6 lbs. 



Lime 9 lbs. 



London purple 4 ox.s. 



Water 45 gals. (1 bbl.) 



