108 Bulh'iiìì di' ht Sociétî' Enlomoh)<ii<iiic <rE(/iif)fc 



Enrias not (iriven away also — the figures do not scein 

 lo show that it was. 



(2) riial a tailing sujiply olgieen bolls loi the insert 

 to breed in would all'eet matters very eonsideiably. Al- 

 though this factor may have acted later (in fact I think 

 that no doubt it did so, more especially in the case of 

 Earias) I do not consider that it operated early enough 

 to cause the big droj) in the nnniber of moths caught 

 from October 5th onwards, l^p to the end of Sei)lenil)ei- 

 and Ihelirst week of October the plants bore large niun- 

 bers of green bolls; sul)se(juenlly,owing perhaps partially 

 to the Hooding, these lipened oil very quickly and practi- 

 cally speaking no fresh bolls were formed. 



Under normal conditions a good supply of green 

 bolls up to tlie lirst week in October should, I think, 

 have furnished a plentiful supply of })ink bollworm 

 moths durhig that month. 



(li) That the diminishing number of moths wasdue 

 to a natural slacking olT in the active breeding of me 

 s|)ecies owing to a lower mean temperature. Experience 

 in [last years has not shown this (o be the case, active 

 breeding ccniinuini! until wt'll into November. 



