35G Report of the Entomologists of the 



large tuft of needles at the end are convenient instruments for 

 jarring or brushing the bushes. To make this work more effectual 

 the soil between the rows should be kept well cultivated and free 

 from weeds. The work should be done during the heat of the 

 day when the soil is dry and crumbles easily. It should be the 

 aim of the operator to brush the larvae so that they will fall be- 

 tween the rows as far from the bushes as possible, the object 

 being to make them fall on the loose earth where many of them 

 will die from exhaustion in an attempt to return to the vines. 

 Mr. Mikelson, who has tried this method, says that he met with 

 good success. His soil is a light, sandy loam. Where children 

 or other cheap help can be employed, this method is probably 

 cheaper than spraying. If only a few bushes are infested it is a 

 quick and easy method of checking the pest. 



Fall cultivating. — The object is to bring the cocoons to the sur- 

 face of the ground where they will be exposed to the weather. 

 As a fair percentage of the cocoons are found from a foot to two 

 feet from the bushes, some good could probably be done in this 

 way, but the method needs further testing. 



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Spraying. — Two kinds of insecticides may be used in a spray 

 against this insect, namely, arsenical compounds and hellebore. 

 Both are efficacious, but hellebore is usually preferred, because of 

 the prejudice against the use of arsenicals on rapidly developing 

 small fruits and because hellebore does not disfigure either fruit 

 or leaves. 



Experiments. — A large field of raspberries belonging to Mr. 

 Mikelson, which was badly infested with this insect, was divided 

 into three plats for the purpose of the experiments. Plat I was 

 sprayed June 4 with arsenite of lime, 1 pt. of the stock solution to 

 40 gallons of lime water; Plat II with hellebore, 1 oz. to 1 gallon 

 of water; Plat III was left unsprayed. 



Results. — On the second day after this application practically 

 all the larvse were dead on the sprayed plats. On Plat I the 

 leaves were seriously injured, but as subsequent experiments with 



