MONTANA EXPERIMENT STATION. 151 



necessary to thrust the apparatus through the limbs hi such a way 

 as to coat the under side of the leaves. The operator had best pro- 

 tect himself from drippings by rubber garments or old clothing for 

 which he has no further use. With arsenate of lead it is alwa^'s 

 necessary to keep the mixture within the pump well churned in 

 order to get an even distribution of the poison, as the heavy lead 

 compound settles rapidly. This is best accomplished b}^ the use 

 of a pump with an agitator provided for that special purpose, but 

 may be done on a small scale by frequently turning the spray back 

 upon itself through the nozzle, or by other methods of churning. 



WHAT TO SPRAY WITH. 



As the experiments recorded above dealt only with arsenate of 

 lead we can of course give its relative value with other sprays only 

 by the results obtained from their use in other localities. It is only 

 lair to say in this connection that in the Dresent instance it has given 

 much better results than those recorded from the use of others in 

 other places where it was reported that their effectiveness was not 

 encouraging. It is especially favorable for the first spring applica- 

 tion as the young buds at that time are quite delicate and will not 

 always withstand the Paris green compounds, which are likely to 

 burn them at that rainy season of the year. The arsenate can be 

 safely applied at that time in the proportion of four and a half to 

 five pounds in 50 gallons of water; the second dose, if it be applied 

 after the blossoms have gone, may be increased to 5 and a half or 

 six pounds, and the third as much higher as the condition of '.he 

 fruit will allow. 



NATURAL ENEMIES OF THE BUD MOTH. 



The natural enemies of this pest must not be overlooked since 

 they form no small element in its control. The enormous multipli- 

 cation of the moth within the wire screen composing the cage as 

 compared with neighboring trees outside. 'shows the remarkable ef- 

 fectiveness of birds and the larger insects in reducing its numbers. 

 Within the cage numerous parasites were always in evidence. It 

 was found that larvae or pupae left about the cage we^e invariably 

 taken by ants which were always running up and down the trees 



