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three insects that cover a long season. The arsenate of lead 

 will kill any one of them if it is applied at the right time. 

 I think if you follow Prof. Parrott's suggestion for dormant 

 spraying just before the cluster buds open, you will reduce 

 the tent caterpillar to a great extent. I should not advise 

 anyone to leave the control of the brown-tail moth to the 

 spraying, because you will want to put your spraying off 

 until the proper time for the codling moth, the gypsy moth 

 f.nd the canker worm, and it will be too late to save the 

 trees from the work of the brown-tail moth. If you have 

 those three insects, my suggestion would be that you remove 

 all the brown-tail moth nests in the winter by cutting them 

 from the trees and burning them. Spray with a dormant 

 spray just before the leaf buds open and spray very thor- 

 oughly with a strong solution of arsenate of lead just after 

 the petals have fallen ; add wdiatever mixture you use for 

 fungus control. 



A ]\IEI\IBER: T would like to adv .Air. Frost what he 

 calls a strong solution, how many pounds of arsenate of 

 lead would he dare to use with 40 or 50 gallons of water. 



MR. FROST: That is to control the brown-tail moth? 



A ME^IBER : Yes sir. 



MR. FROST: I would suggest that you do not depend 

 on the spraying for the brown-tail moth. The brown-tail 

 may be killed much easier than the gypsy moth. I spray 

 my own orchards which are in a badly infested gypsy moth 

 area, using arsenate of lead of the strength of-one pound tO' 

 ten gallons of water at the weakest. I shorld prefer to use 

 one to eight. 



A MEMBER: I would like to ask if the brown-tail moth 

 and the tent caterpillar do not work about the same way. 



MR. FROST : They do, they work together, but if you 

 spray for the tent caterpillar and the brown-tail moth, it 

 will be necessary to spray before the foliage is all out and 

 when the gypsy moth hatches you have got new foliage that 

 has not been covered by the poison. After these insects 

 have reached a certain size, they will eat quite an amoimt of 



