478 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 6 



become very popular. There is no question that arsenate of lead 

 possesses many advantages over Paris green for most insect icidal 

 uses, and the powdered form has come to be considered as more 

 economical to buy, more convenient to store and to prepare for spray- 

 ing, than is the paste form. In numerous comparative experiments, 

 insect control from spray made up from powdered arsenate of lead has 

 been just as good as with that made from the paste form. 



Here in the South, powdered arsenate of lead has been used very 

 extensively since the fall of 1911 for the control of the cotton worm 

 and is rapidly coming into general use for application for the control 

 of other leaf-eating insects, such as potato beetles. The same method 

 of application as has been used for the cotton worm can be used for 

 applying the powdered arsenate of lead as a dust for many other 

 leaf-eating insects. This method of application by what is called the 

 pole and bag outfit, as fulty described in Alabama Bulletin No. 164, 

 requires no expensive outfit and gives very rapid and convenient dis- 

 tribution to the poison. 



In Alabama and Mississippi in the fall of 1911 at least 500,000 

 pounds of the powdered material were distributed for use in cotton- 

 worm control. Many cotton planters started the fight against the 

 worms WT-th dust applications of Paris green. In many cases, however, 

 the Paris green caused sores, both upon men and animals engaged in 

 the application and workmen frequently refused to continue the work 

 if obliged to use Paris green. Many of these same planters then 

 turned to powdered arsenate of lead and continued their fight against 

 the cotton worm with highh' satisfactory results. In all the work 

 that was done in Alabarra vnth powdered arsenate of lead, we have 

 yet to hear of a single sore from it upon either man or animal engaged 

 in its application, or of a single case of internal poisoning resulting 

 from this extensive use. 



Publicity is given to the foregoing note at this time because of the 

 fact that, during the past summer, certain parties have been scattering 

 broadcast circular matter announcing in substance such grave danger 

 of fatal poisoning from the use of powdered arsenate of lead that its 

 manufacture and distribution ought to be prohibited by law. The 

 parties from whom we received this circular matter are known to 

 us as extensive manufacturers of another form of insecticide. Definite 

 information regarding authentic cases of injurious effects from the use 

 of powdered arsenate of lead were at once requested from the parties 

 issuing the warning, but, during the several months that have elapsed 

 meantime, not a word has been received from them. 



This statement is issued in the hope that those who may have need 

 to use any arsenical insecticide may not be misled. If there were real 



