62 DECIDUOUS FRUIT INSECTS AND INSECTICIDES. 



of lead to 50 gallons of Bordeaux mixture. The first application 

 Avas made before the blossom-buds opened, and two later applica- 

 tions were made, applying them at the time of appearance of the 

 beetles in injurious numbers. This method of control has been con- 

 ducted in this vineyard for three consecutive seasons, and the owner 

 states that he is satisfied with the results that he has obtained and 

 considers it far more effective and less expensive than the hand- 

 picking method of control. 



Located at Girard, Pa., is a vineyard of 40 acres, under the manage- 

 ment of Mr. M. C. Kibler, which is subject to the attacks of rose- 

 chafers every season. This vineyard was visited on June 23, 1910, 

 at which date about 20 women and girls were engaged in handpick- 

 ing the beetles from the entire area. The whole vineyard had been 

 gone over daily in this manner for a week previous to our visit, yet 

 there was evidence of considerable injury by the beetles. At this 

 date Mr. George F. Miles, of the Bureau of Plant Industry, was 

 making Bordeaux-mixture applications on several acres for control 

 of the black-rot fungus. Five pounds of arsenate of lead were added 

 to the Bordeaux mixture applied to this area. YYTien the party of 

 women who were handpicking the rose-chafers did the collecting 

 over the sprayed area on the following: day. they found only a small 

 number of beetles there as compared with the number found en the 

 unsprayed parts of the vineyard. 



THE TTSE OF SWEETENED ARSENICALS. 



In the summer of 1907 it was reported that an arsenical spray that 

 had been sweetened with cheap molasses had proved' effective in 

 poisoning the rose-chafer in the vineyards in Michigan. In Septem- 

 ber of that year the writer visited Mr. Frank Stainton. at Lawton, 

 Mich., who was reported to have used this sweetened arsenical. In 

 conversation with Mr. Stainton it was discovered that this sweetened 

 arsenical was a proprietary mixture made by a local doctor. Mr. 

 Stainton stated that he received a sample of it rather late in the 

 season and applied some of it to rosebushes infested by the rose- 

 chafer. The beetles appeared to be attracted to the sweetened poison, 

 eating it in apparent preference to the flowers of the plant, and died 

 shortly after. Upon analysis this sweetened arsenical was found to 

 consist of arsenite of lime and molasses. Mr. Stainton expressed his 

 intention to use sweetened arsenite of lime against the rose-chafer in 

 his vineyards during the season of 1908. In the spray experiments 

 conducted in the vineyard of Dr. E. Kelly, at Moorheaclville, Pa., in 

 1908, against the rose-chafer, 1 gallon of molasses was added to 50 

 gallons of Bordeaux containing arsenite of lime made according to 

 Kedzie's formula (1 ounces of white arsenic to 50 gallons of the 

 above-mentioned sweetened mixture). One gallon of molasses was 

 also added to Bordeaux mixture and arsenate of lead, and in addi- 



