KiO JorKXAI. OF ECONOMIC ENTOMOLOGY [Vol. 2 



l)ouiid of lead was used, witli two i)Oitnds of lime added per 50 gal- 

 lons ? 



Mr. Quaintance : Yes. 



Mr. Skinner : I have been much interested in this paper, and I 

 think Professor Slingerland's question is very important, as to whether 

 the arsenate of lead is repellent, or whether it acts as a stomach poison. 

 If it is a repellent it seems to me that it would be possible to use some 

 other material that would have the same effect without any injury to 

 the foliage. It has seemed to me that one of the great troubles about 

 economic entomology is that too much reliance is placed on arsenicals, 

 — perhaps I should not say "reliance." From the standpoint of 

 economic entomology there are so many other chemicals that can be 

 used. This Association has demonstrated that the men working on 

 these lines a.re largely investigators, and at least have some time to 

 devote to investigation, and these investigations of problems are the 

 ones that to me, personally, are extremely interesting. It seems to me 

 that that particular point is one of very great interest, whether these 

 insects are deterred from the fact that the material that they eat is a 

 stomach poison or whether it repels them in some other way, and I am 

 cj[uite impressed with this idea of the subject, and I sincerely hope that 

 the men who have the opi)ortunity of studying these matters will take 

 up that point and report on it. 



Mr. Hinds : I would like to ask in regard to the feeding of the 

 plum curculio after the crop of fruit ha^ been gathered. Is it prac- 

 tical to apply arsenical poisons after the crop has been removed and 

 when the foliage is stronger than earlier in the season? 



Mr. Taylor: Mr. President, I made some jarring records this 

 summer and found that there were verj^ few beetles on the trees at that 

 time. This is not conclusive evidence that some feeding might not 

 take place, although the number of beetles secured was very small. 



Mr. Schw^\rz: Mr. President, it is possible that there are two 

 species of Conotraclielus that attack peaches. INIany years ago, while 

 visiting Prof. H. A. Morgan at Baton Rouge, Louisiana, he showed 

 me specimens of Conotraclielus anaglypticus which had been bred from 

 peaches. It would be worth while to try to ascertain the breeding 

 habits of C. anaghjpficus, as it is one of the common weevils in east- 

 ern United States. I do not think that Professor ]\rorgan has ever 

 published this interesting observation. 



President Forbes : The next paper will be ])y ^Nlr. Hinds. 



