104 



DECIDUOUS FRUIT INSECTS AND INSECTICIDES. 



sprayed by the owner. Plat I includes 32 trees; Plat II, 24 trees; 

 Plat III, 36 trees; and Plat IV, 8 trees. The treatments which the 

 respective plats received are shown in Table XV. 



Table XV. — Treatments and dates of applications for the codling moth and the plum 

 curculio. One-spray method. Wichita, Kans., 1911. 



Dates of application. 



Plat I (demonstra- 

 tion). Commercial 

 lime - sulphur and 

 arsenate of lead. 



Plat II (demon- 

 stration). Bor- 

 deaux and arse- 

 nate of lead. 



Plat III (one- 

 spray method). 

 Commercial lime- 

 sulphur and ar- 

 senate of lead. 



Plat IV. 



First application, 

 Apr. 14 (before blos- 

 soms opened). 



Second application, 

 May 1 (after petals 

 dropped). 



Third application, 



May 19-22. 

 Fourth application, 



July 1. 



Not drenched. Bliz- 

 zard nozzles. Coarse 

 spray. Arsenate of 

 lead, 2 pounds to 50 

 gallons commercial 

 lime-sulphur (li-50). 

 Pressure, 200 pounds. 



do 



Not drenched. Bliz- 

 zard nozzles. 

 Coarse spray. Ar- 

 senate of lead, 2 

 pounds to 50 gal- 

 lons. Bordeaux 

 (3-4-50). Pressure, 

 200 pounds. 



do 



Unsprayed. 



.do. 

 .do. 



..In. 



.do. 



Drenched with ar- 

 senate of lead, 2 

 pounds to 50 gal- 

 lons commercial 

 lime-sulphur (1J- 

 50). Blizzard noz- 

 zles. Coarse sprav. 

 Pressure, 200-240 

 pounds. 



Unsprayed 



Unsprayed. 



Do. 



.do. 



Do. 

 Do. 



Plats I and II, the demonstration plats, received four applica- 

 tions in all, the first, before blooming but after the cluster buds 

 opened, being applied for the cankerworm and apple scab. Plat I 

 received arsenate of lead at the rate of 2 pounds to 50 gallons of com- 

 mercial lime-sulphur. On Plat II Bordeaux was used instead of 

 lime-sulphur; otherwise the treatments of the two plats were the 

 same. Plat III, the one-spray plat, received only one application 

 of arsenate of lead, 2 pounds to 50 gallons of commercial lime-sul- 

 phur. This was applied just after the petals fell. Plats I and II 

 received 10 gallons of spray per tree each for the application at the 

 time of the falling of the petals, while Plat III received 13 gallons 

 per tree at that time. The coarse spray-nozzle was used on all 

 plats for each application, but only the one-spray plat was drenched. 



