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THE MONTHLY BULLETIN. 



WHITE FLY AT MARYSVILLE. 



By Geo. P. Weldon. 



Since the discovery of the white fly {Dialeurodes citri) in Marysville 

 in 1907, and the campaign for eradication launched during that year 

 under State Commissioner of Horticulture Elwood Cooper, and the sub- 

 sequent campaign under Mr. Cooper's successor, Mr. Jeffrey, inspections 

 have been made each season to determine the status of the pest. These 



Fig. 77. — Leaf of citrus, showing larvse and pupae of the citrus white fly 

 {Dialeurodes citri). (Original.) 



inspections have revealed its presence, but not generally to a serious 

 extent. Because of the large area infested in Marysville, and because 

 of the variety of host plants and the attitude of certain of the citizens, 

 the fight was exceedingly unpleasant and difficult, and while the most 

 strenuous efforts were put forth they did not result in complete eradica- 

 tion. On October 27, 1914, Mr. E. J. Branigan began an inspection of 



