that the aeroplane might be used with advantage against this insect, also. Finan- 

 cially, the method would seem to be more economical than the use of ground ma- 

 chines and would, of course, be employed by communities, cooperatively. 



1924 - Post, G. B. Boll weevil control by airplane. Ga. State Col. of Agr., Ext. Div. 



B. 301, v. 13(4):22. Nov. 



Discusses advantages, feasibility, and principles of applying calcium 

 arsenate dust by airplane for boll weevil control. 



1925 - Hinds, W. E. Airplane dusting. La. Agr. Expt. Sta. Ann. Rpt. of La. State U and 



A. & M. Col. 



The application of calcium arsenate to cotton for weevil control by means of 

 airplanes was undertaken in a commercial way and upon a large scale in Louisiana 

 for the first time in 1925. The Huff-Daland Dusters Inc. was the only concern in 

 the field. This work was closely watched from the experimental standpoint, also. 

 With 4 airplane dusting units at work, more than 50,000 acre-applications were 

 made to cotton for weevil control. There did seem to be an excellent prospect in 

 Louisiana for the expansion of airplane dusting for boll weevil control. 



1926 - Hinds, W. E. Airplane dusting for cotton for boll weevil control. J. Econ. Ent. 



19(4):607. 



In this paper, of which only the abstract is published, the method adopted for 

 dusting cotton by means of aeroplanes is described. An aeroplane adapted for 

 this work carried a load of 500 lbs. of calcium arsenate, and was flown to and fro 

 across the fields at a height of from 10 to 25 ft., so that the dust cloud covered a 

 strip of cotton from 200 to 250 feet wide, the aeroplane travelling at 100 miles 

 per hour and dusting an acre of cotton in less than 2 seconds. One aeroplane can 

 protect 5,000 acres of cotton through the season. Planters can cooperate in the 

 use of such an aeroplane which relieves them from disagreeable night work. The 

 aeroplanes can dust in daylight, in spite of light breezes, and can give prompt 

 protection after heavy rains and to the rankest growth of cotton. The results of 

 their use against the boll weevils were very satisfactory. 



1926 - Wilson, R„ J. Boll weevil control by airplane. Agriculture- -An attractive field 

 for commercial aviation. Cong. Rec. 67(40):2887-2888. Wash. 



During 1924 a commercial corporation successfully dusted about 1,000 acres 

 of cotton with calcium arsenate from airplanes for the control of the boll weevil 

 in Mississippi. In 1925 the activities of the company were extended, and 50,000 

 acres of cotton, 200,000 peach trees, pecan groves, and sugarcane fields were 

 dusted in several States, the work gaining the unqualified approval of 98% of the 

 farmers concerned. The inclusive cost of dusting cotton was about $5.35 an acre, 

 3 applications being made. 



1929 - Thomas, F. L„, W. L. Owen, Jr., J. C. Gaines, and F. Sherman III. Boll weevil 

 control by airplane dusting. Tex. Agr. Expt. Sta. B. 394, 40 p., 11 fig. Apr. 

 College Station. 



The use of airplanes for the distribution of calcium arsenate on cotton is 

 briefly reviewed. In Texas, the area so treated has increased from 3,000 acres in 

 1925 to approximately 50,000 acres in 1928. This bulletin describes, in detail, 

 observations of this method against the boll weevil on 3 farms, containing 400, 

 1,200, and 2,700 acres of cotton, respectively. Three to 5 applications were made, 

 the amount used being always more than 5 and sometimes 8j lbs. to the acre. 

 Within 10 days, after 2 applications had been made, the number of squares punc- 

 tured by the weevils was reduced by 50% and increased yields of seed cotton, 

 varying from 63 to 206 lbs. to the acre, were produced wherever conditions war- 

 ranted the use of control measures. 



The cost of dusting by airplane, including the poison, ranges from $0.75 to 

 $1.00 an acre, and the method is considered justifiable when infestation averages 

 15% early in the season or 20% later on, with weather conditions favorable to the 

 weevils. Airplane dusting is particularly suitable wh„re wet ground prevents the 



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