94 THE EEPOKT OF THE No. 36 



Control, 



Tile excellent results secured in New Jersey in the control of the strawberry 

 weevil by the use of a dust preparation composed or powdered arsenate of lead 

 and finely ground sulphur led us to give this remedy a trial. Two mixtures were 

 tested (1) 100 sulphur, 20 arsenate of lead, and (2) 90 sulphur, 10 arsenate of 

 lead. 



Two strawberry fields at Oakville were treated by the junior writer, and one 

 plantation at Yineland was dusted under our supervision. In addition to these a 

 considerable number of strawberry patches in the Oakville and Niagara districts 

 were treated by their owners. The applications were made by means of: (1) a 

 Monarch duster, (2) a home-made twirler,* and some of the growers used cheese- 

 cloth bags. 



The dust was applied, weather permitting, as soon as the weevils were found 

 in large numbers. The Bartlett patch at Oakville, and part of the Church patch 

 at Vineland, were dusted twice on account of the first application being washed 

 otf by rains, but all the others received only one application. 



Eesults. 



W. Bartlett, Oakville. The weevil has been injurious to Mr. Bartlett's 

 strawberries for a number of years and this spring the adults were again vers- 

 abundant in his patch and threatened to cause serious loss. The two dust mix- 

 tures mentioned above were tested and two applications were made. 



Eesults. No more than 5 per cent, of the' buds in the whole patch were 

 destroyed and Mr. Bartlett picked the largest crop of berries he had ever harvested. 

 No marked difference was noted between the rows dusted with the 100 : 20 mixture 

 and those with the 90:10. 



As this was the main experimental patch we arranged to leave an adjoining 

 berry patch untreated as a '' check." However, Mr. Bartlett found the weevil hard 

 at work in our " check " patch, and decided very' suddenly that he was more inter- 

 ested in dollar and cent returns than in experiment results, and he gave what was 

 to have been our " check " patch a heavy coat of dust. 



R. Burton", Oakville. Last year (1918) at least 75 per cent, of the buds were 

 destroyed in Mr. Burton's two-acre patch of Glen Mary strawberries. The two 

 dust mixtures were tested this year and only one application was made. 



Results. Here again there was no difference in the amount of injury 

 between the rows dusted respectively with 100 :20 and 90 :10. Throughout the 

 whole of the patch no more than 10 per cent, of the buds were destroyed, and at 

 least half of this injury was done before the dust was applied. 



It should be mentioned that in our estimation this particular experiment was 

 of little value because in all cases which came under our observation this year, the 

 variety. Glen Mary, escaped serious injury. 



S. Church, Vineland. Last year over 50 per cent, of the buds in !Mr. 

 Church's patch were destroyed, and this spring the weevils were present in large 

 numbers. Several rows of early berries were dusted twice. However, the main 

 patch of Williams only received one application. Only the one dust, the 90:10. 

 was used. 



='^The frame work of the holder was made of a wire ring 9"-10" in diameter and 

 two bent wires crossed at right angles. This was lined with fine wire cloth, twenty or 

 more meshes to the inch. A bent branch was used as a handle. 



