BULLETIX NO. '^2, MARCH, 1S95. 10'.) 



Hard Laundry Soap: 



U. Two pounds dissolved in one gallon of water. Fatal to eighty-five per cent, of 

 the scales. 



15. One and one-half pounds in one gallon of water. Same result. 



16. One pound in one gallon of water. Fatal to sixty per cent, of the scales. 



IV. One-half pound in one gallon of water. Fatal to twenty per cent, of scales. 



18. One-fourth pound in one gallon of water. Fatal to ten per cent, of scales. 



Concentrated Potash Lye: 



19. Two pounds in one gallon of water. Fatal to eighty-five per cent, of scales. 



20. One pound in one gallon. Fatal to seventy-five per cent, of the scales. 

 ~1. One-half pound in one gallon. Fatal to one-half the scales. 



33. One-fourth pound in one gallon. Fatal to twenty per cent, of the scales. 



Fish=oil Soap, Home=made : 



23. One and one half pounds in one gallon of water. Fatal to half the scales. 



34. One pound in one gallon. Fatal to twenty per cent. 



35. One-half pound in one gallon of water. Fatal to five per cent, of the scales. 



Oregon Winter Wash: 



36. (Ordinary strength.) Sulphur, 15 pounds ; slaked lime, 15 pounds; bluestone, 1'+ 

 pounds : water sufQcient to make 100 gallons. Fatal to a comparatively small percentage 

 of the scales. 



37. (Double strength.) Sulphur, 30 pounds; slaked lime, 30 pounds; bluestone, 2J-< 

 pounds ; water sufficient to make 100 gallons. (Juite a large percentage of the scales 

 escaped destruction. 



California Lime=sulphur'and'Salt Wash : 



38. (Ordinary strength ) Suliiliur, 35 pounds ; lime, .50 pounds ; salt, 18 pounds : water 

 sufUcient to make 100 gallons. Fatal to a comparatively small percentage of the scales. 



39. (Double strength.) Sulphur, 50 ijounds; lime, 100 pounds : salt, 36 pounds; water 

 to make 100 gallons. A rather large percentage of the scales not destroyed. 



Note.— Experiments 8 to 11 and 14 to 35 were followed in from seven to ten hours 

 after the application of the washes by a hard shower of ten or fifteen minutes' duration. 

 Experiments 3 to 7 had been on the trees a little over twenty-four hours previous to this 

 rainfall. The otlier experiments were of earlier date, and were not infliienced by rains 

 for a considerable time after the applications were made. 



Insecticide Apparatus. — In Bulletin No. 'Z'd, of the Station, in 

 treating of the best means of spraying apple trees for preventing the 

 ravages of the Apple Worm or Codling ]\Ioth, I have given some account 

 of the machinery required in connection with the use of the arsenites. 

 On large trees and for orchards the same machinery will apply for the use 

 of the washes and emulsions just treated of for scale-insects, and may 

 be repeated here. 



A good, strong double-acting force pump should be purchased and 

 mounted on a large stout barrel with the supply tube reaching well 

 down to the bottom. It has become the custom to mount the pump in 

 the end of the barrel, but except in the case of the Nixon Tripod, it will 

 be almost as easy to mount it on the side of the barrel, which is easily 

 held in place by a skid near either end, and is then more compact and 

 stable than when standing on the end while the handle of the pump 

 comes lower and is more easily worked. 



It will be well to buy the pump without the attachments. About 

 25 feet of \ inch cloth insertion rubber tubing is attached to the discharge 



