Feb. '08] JOURNAL OF ECONOMIC ENTOMOLOGY 17 



make a very short growth of wood annually and are thereby enabled 

 to -resist scale attack are usually neglected by the owners and do not 

 yield profitable crops of fruit. The best growers aim to secure a 

 large amount of new, vigorous wood, as this insures better quality of 

 fruit. This practice is particularly true in peach culture. 



Mr. J. L. Phillips stated that in Virginia fruit growers are attempt- 

 ing to keep their trees in a vigorous condition and are able to secure 

 profitable crops by spraying to hold the scale in check. The trees 

 which are not being injured by the scale and where no spraying is 

 being done, are neglected ones that are not a source of profit to their 

 owTiers. 



Mr. J. G. Sanders called attention to the fact that healthy, vigorous 

 trees increased the fecundity and growth of infesting scale insects 

 to a remarkable degree ; the reverse being true in old, enfeebled trees. 

 He stated that by transferring the cottony maple scale {Pulvinaria 

 innumerabilis) to various vigorous plants he had reared forms that 

 had been previously described as distinct species of that genus. By 

 transferring this species from thickly infested maple trees to vigorous 

 young lindens and sycamores he had secured specimens three times 

 the size of the original females and a corresponding increase in egg 

 production resulted. 



President Morgan remarked that the paper under discussion was 

 one that should interest the nurserymen and horticulturists and called 

 on Prof. Craig for remarks. The latter expressed the opinion that 

 the entomologists should go very slow in advocating any method of 

 preventing scale injury along the line of doing less spraying or of 

 practising less cultivation in the orchard. Fruit growers are always 

 on the alert for some easy method of destroying this pest and he 

 feared that statements of this sort from officials would be used by 

 careless and indifferent growers as an argument for doing nothing. 



A paper was read by Mr. Washburn : 



FURTHER OBSERVATIONS ON THE USE OF HYDRO- 

 CYANIC ACID GAS AGAINST THE FLOUR MOTH 



By F. L. Washbuen, St. Anthony Park, Minn. 



(Withdrawn for publication elsewhere.) 



The Secretary briefly reviewed a paper received from Mr. A. L. 



Herrera, Mexico City, Mexico, on "Notes on the Orange Worm" 



(Trypeta ludens), and exhibited a colored plate which accompanied 



the paper. 



Mr. W. D. Hunter gave a description of the able work that Mr. 



