230 MONTANA EXPERIMENT STATION. 



the writer undertook a series of tests c^ the lime-sulphur-salt wash 

 as a remedy. The experiments were conducted in the orchard of 

 Mr. C. M. Allen of Lo Lo. I would here express my gratitude to 

 this gentleman for many courtesies extended to me, both in connec- 

 tion with these experiments and at other times. 



In the experiments Mr. Allen's entire orchard of 190 trees was 

 used and we feel entire confidence in the results we obtained. The 

 spraying was done on April 21 and 22, the pear buds being swollen 

 almost to the point of opening. 



In the various tests we used the following: 



Spray No. i. 



Lime i pound. 



Sulphur I pound. 



Salt I pound. 



Water 4 gallons. 



Spray No. 2. 



Lime i pound. 



Sulphur I pound. 



Water 4 gallons. 



Spray No. 3. 



Lime ^ pound. 



Sulphur i I pound. 



Water 4 gallons. * 



Spray No. 4. 



Lime i pound. 



Water 8 gallons. 



Ten trees were used in experiment No. 4 (lime and water only) 

 and ten trees were left unsprayed. The remaining trees were about 

 evenly divided in experiments Nos. i, 2, and 3. 



The results of the tests were very satisfactory and seemed con- 

 clusive. The mites were practically exterminated on all trees treat- 

 ed with sprays i, 2, and 3. The mites on the ten trees sprayed with 

 No. 4 were, so far as we could determine, wholly uninjured. These 

 trees and the ten left unsprayed were badly affected with the mites 

 after the foliage expanded. 



Directly the other side of a barbed wire fence are more pear 

 trees badly afifected with the mite. The two pear orchards are really 



