70 



PEACH LEAF CURL: ITS NATURE AND TREATMENT. 



perfect, etc. As will be seen, however, there were very few imperfect 



trees. 



In all the following calculations of fruit, etc., these few discrepan- 

 cies in the number of trees are carefully taken into account in arriv- 

 ing at results intended for comparison with other rows. The amounts 

 produced by the trees of each row are first divided by the number of 

 trees actually in the row to obtain the average per tree, and this 

 amount is multiplied by 10 to obtain the amount a full row would 

 yield at the given average. By reference to the plat it may be seen 

 that the trees and parts of trees missing amount to but 5.8 equivalent 

 trees for the entire block, that 51 of the 58 rows have the whole com- 

 plement of 10 perfect trees, and that the missing trees or parts of 

 trees are divided among the remaining 7 rows. 



SPRAT WORK CONDUCTED IN 1894. 



The spray tests conducted in the Rio Bonito orchard in 1894 

 included the application of sprays prepared according to 38 different 

 formuke, making 38 distinct experiments. Each experiment included 

 two adjoining rows of 10 trees each, one sprayed and the other 

 unsprayed for comparison. Of these 38 experiments 11 involved two 

 sprayings of the trees treated and 27 a single treatment. All treat- 

 ments were made during the dormant period of the trees and varied 

 in date from February 1 to March 6. The consideration of the 

 preparation of sprays for this work will be discussed in a subsequent 

 chapter devoted to that subject, as will also the methods of applica- 

 tion, which will be given for use in both small and large orchards. 



The table which follows is prepared to show as concisely as possible 

 the arrangements adopted for the experiments of 1894. The rows of 

 trees once treated and those twice treated are shown, the date or dates 

 of treatment and the formula or formuhie used in each case. 



Table I.— Shoiving the formulae of the sprays applied in 1894, dates of applicaiion, and 



rows treated. 



5. 

 6. 

 7. 

 8. 

 9. 



10. 



11. 

 12. 

 13. 

 14. 

 15. 



16. 



Row No. 



Date of 

 spraying. 



Feb. 20 



Feb. 24 

 /Feb. 16 

 IFeb. 28 



Feb. 

 Feb. 



Feb. 23 

 /Feb. 20 

 l.Mar. 3 



Feb. 24 

 Feb. 13 



Feb. 13 

 /Feb. 26 

 \Mar. 6 



Formulse for 45 gallons of spray. 



15 lbs. sulphur, 30 lbs. lime, 10 lbs. salt. 



Control row. 

 10 lbs. sulphur, 20 lbs. lime, 7 lbs. salt. 

 10 lbs. .sulphur, 20 lbs. lime, 7 lbs. salt. 

 5 lbs. sulphur. 10 lbs. lime, 3 lbs. salt. 



Control row. 

 5 lbs. sulphur, 10 lbs. lime, 3 lbs. salt. 

 15 lbs. sulphur, 30 lbs. lime. 



Control row. 

 10 lbs. sulphur, 20 lbs. lime. 

 10 lbs. sulphur, 20 lbs. lime. 

 5 lbs. sulphur^ 10 lbs. lime. 



Control row. 

 5 lbs. sulphur, 10 lbs. lime. 

 20 lbs. lime, 20 lbs. salt. 



Control row. 

 20 lbs. lime. 

 45 lbs. salt (hot).. 

 45 lbs. salt (hot). 



