Kew York Agricultural Experiment Station. 



303 



Rows 5 and 12 were sprayed five times with Bordeaux mixture 

 (]-to-7 formula) and Paris green. 



Rows G and 13 were sprayed five times with Bordeaux mixture 

 (l-to-7 formula) alone. 



Rows 7 and 14 were sprayed five times with Bordeaux mixture 

 (1-to-ll formula) and Paris green. 



The several applications were made to all fourteen rows on the 

 same dates, namely, June 11, June 26, July 10, July 24 and Au- 

 gust 7. The last application was omitted from Rows 4 and 11. 

 All liquids were applied with a knapsack sprayer and care was 

 taken that each row received practically the same quantity. In 

 all cases where Paris green was used (except on Rows 1 and S;, 

 it was used at the rate of one ounce of Paris green to four gallons 

 of liquid. The first application was made when the plants were 

 about six inches high. 



Prevalence of insects and disease. — Ko trace of late blight ap- 

 peared and only a small amount of early blight. Flea-beetles 

 were moderately abundant and Colorado potato-beetles very 

 abundant. For a few days after the first treatment, June 11, the 

 potato-beetles were scarce, but by the time of the second treat- 



COMPARATIVE ICfFECT OP DIFFERENT FUNGICIDES AND INSECTICIDES UPON 



Yield of Potatoes. 



KIND OF TREATMENT 

 RECEIVED. 



FuDgiroid and Paris green 

 times ". 



Paris green in lliue-water, 5 

 times 



Paris green in lime-water, 

 once; "Lion Brand" Bor 

 deanx + Paris green, 4 times 



l-to-7 Bordeaux-I-Paris green 



4 times 



l-to-7 Bordeaux-|-Pari9 green 



5 times 



l-to-7 Bordeaux, 5 times 



1-to-ll Bordeaux -f- Paris 



green, 5 times 



Product of the 

 Two Rows. 



7.25 

 8.00 



10.63 



11.00 

 8.75 



11.25 



Bn. 

 3.00 



2.50 



1.75 



1.50 



1.25 

 1.50 



1.00 



Computed Yield Per 

 Acre. 



Bii. 

 62.50 



68.75 



72.25 



91.50 



94.75 

 72.25 



97.00 



Bu. 

 25.75 



21.50 



15.00 



12.75 



10.75 

 13.00 



8.50 



.= .-2 



Bn. 

 88.25 



90.25 



87.25 



103.25 



105.50 

 88.25 



105.50 



§1 



> « 



Bu. 

 — 6.25 



+ 3.50 

 + 22.75 



-I- 26 

 + 6 50 



+ 28.25 



