ONE-SPRAY METHOD FOR CODLING MOTH, ETC. 



93 



counted throughout the season for records are designated by the 

 same numbers which these trees bear in the tables. The orchard 

 is almost level, sloping slightly toward the west. It was kept clean, 

 cultivated throughout the summer, and sown to oats in the fall for 

 cover crop. The trees are 30 years old and medium to large in size. 

 Plat I included 18 trees; Plat II, 17 trees; Plat III, 19 trees; Plat IV, 

 12 trees; Plat V (the unsprayed plat), 21 trees, this last plat extending 

 across the orchard near the center. The treatments given and dates 

 of application are shown in Table VI. 



Fig. 24.— Diagram showing arrangement of plats and trees in the Edward Hutchins orchard, near Fenn- 

 ville, Mich. Trees counted are indicated by circles, (he numbers agreeing with the numbers of trees in 

 the tables. Yarieties: B, Baldwin; G, Rhode Island Greening (counts were made from these first two 

 varieties only); D, Dutchess; 1", Yellow Transparent; K, King; F, Fall Pippin; SI, Stark; S, Sweet 

 Greening; IF, Wagner; T, Tolman Sweet ; J , Jersey Sweet. (Original.) 



Table VI. — Treatments and dates of application for the codling moth and the plum 

 curculio. One-spray method, etc. Fcnnville, Mich., 1911. 



Dates of application. 



Plat I. 



Plat II. 



Plat III. (One-spray 

 method.) 



First application, May 12 



(after cluster buds 



open.) 

 Second application, May 



25 (as soon as petals 



dropped). 



Third application, June 

 14. 



Fourth application, July 

 25. 



Scab treatment. Com- 

 mercial lime-sulphur 

 (li-50) alone. 



Not drenched. Mist 

 nozzles. Arsenate of 

 lead, 2 pounds to 50 

 gallons commercial 

 lime-sulphur (li-50). 

 Pressure, 125 pounds. 



....do 



.do. 



Scab treatment. Home- 

 boiled lime-sulphur 

 (4S-2L-50) alone. 



Not drenched. Mist 

 nozzles. Arsenate of 

 lead, 2 pounds to 50 

 gallons home-boiled 

 lime-sulphur (4S-2L- 

 50). Pressure, 125 

 pounds. 



do 



.do. 



Scab treatment. Com- 

 mercial lime-sulphur 

 (1J-50) alone. 



Drenched with arsenate 

 of lead, 2 pounds to 50 

 gallons commercial 

 lime-sulphur (li— 50). 

 Bordeaux nozzles. 

 Pressure, 150-175 

 pounds. 



Commercial lime-sulphur 

 only (1J-50). Not 

 drenched. 

 Do. 



