388 



BOARD OF AGRICULTURE. [Pub. Doc. 



Outdoor Experiments,* etc. — Concluded. 



9, 



10, 

 11, 

 12, 

 13, 

 14, 

 15, 

 16, 

 17, 

 18, 

 19., 

 20, 

 21, 



NO. OF DATS. 



Di- 



Plumbic 



Arsenate, 



20-150. 



21 



5 



5 



5 



5 



5 



5 



Tri- 



Plumbic 



AreeDate, 



20-150. 



Checks. 



No. 2. 



No. 3. 



3 11 



3 1 



3 1» 



3' 1 



3= 32 



4 32 

 4 3 

 4 3 

 4 3 

 42 3 

 4 4 

 4 



4 

 41 



* Foliage uninjured. 



Di-Plumbic Arsenate. 

 Field Experiments. 

 Twenty pounds to 150 gallons ; glucose, 1 gallon to 150 ; 

 red oak and white oak brush ; badly infested ; larvjB in fifth 

 and sixth stages. Pierce Street, Maiden. 



Sprayed June 25, 1897 

 June 29. Killing well. 



July 1. Killing well. Stripping of foliage has stopped. 

 July 3. Killing well. Eighty per cent, of the larvae are dead 

 Jul}' 10. Killing well. Many larvae pupating. 

 July 15. Poison nearly through killing, because of pupation of larvJB. 



Has given excellent results ; no burning of foliage. 

 July 21. Few dead larvae ; no burning. Poison has killed as well or a 

 little better than the tri-plumbic arsenate. 



