166 BOARD OF AGRICULTURE. [Pub. Doc. 



can spray your vines for this worm. It is a question for the 

 grower to decide whether it would pay to do it, or not. If 

 there are only a few on the bog, it would not pay to spray 

 the whole bog. I know nothing better for this purpose than 

 arsenate of lead. It will not burn the foliage, and is a lit- 

 tle cheaper than Paris green. You cannot kill them with 

 tobacco water. 



Mr. CD. Lincoln. We have on our strawberry bed a 

 small beetle which sometimes completely destroys our young 

 plants, and old ones too. It is about one-eighth of an inch 

 long, black and shiny, and eats holes through the leaves. I 

 have tried Paris green so strong that it would kill the leaves, 

 with no effect on the insect. 



Professor Fernald. I have tried every insecticide I know 

 against this insect, and have found nothing satisfactory as yet. 



Mr. A. H. KiRKLAND (of Maiden). One thing I think 

 misrht be mentioned in connection with the use of arsenate 

 of lead on cranberry bogs. 



Secretary Sessions. Mr. Kirkland has had a very exten- 

 sive experience with insecticides. 



Mr. Kirkland. This arsenate of lead remains on the 

 foliage in an effective condition for a long period of time. 

 We have had this last summer, trees sprayed early in June, 

 and we have found plenty of poison on the leaves in August. 

 I do not know about cranberry insects, but I want to sug- 

 gest that, if your bogs were sprayed with arsenate of lead at 

 about the time the eggs begin to hatch out, the poison would 

 probably remain on the vines for two or three weeks. Would 

 not that cover the hatching time? Paris green washes off, 

 but arsenate of lead will remain on the leaves during a great 

 deal of wet weather ; and the addition of from four to six 

 quarts of glucose to one hundred and fifty gallons of water 

 might cause the poison to adhere longer. 



Question. How much would it cost per acre to spray 

 cranberries ? 



Mr. Kirkland. I have no figures that I can give the 

 gentleman, but I might say that we have sprayed apple and 

 oak trees which we estimated had a leaf surface of about three 

 thousand square feet. We sprayed those trees for eighteen 

 or twenty cents each, where we had spraying gangs working 



