JOURNAL OF ECONOMIC ENTOMOLOGY 



OFFICIAL ORGAN AMERICAN ASSOCIATION OF ECONOMIC ENTOMOLOGISTS 



AUGUST, 1922 



The editors will thankfully receive news matter and other items likely to be of interest to our readers. 

 Papers will be published as far as possible in the order of reception, except that papers of reasonable 

 length maybe accepted in the discretion of the editor for early publication, provided that at least 100 

 reprints be ordered at full price rates; in the case of other matter, the maximum of 2.500 words is 

 still operative. Photo-engravings may be obtained by authors at cost. 



Separates or reprints, if ordered, when the manuscript is forwarded or the proof returned, will be 

 supplied to authors at the rates given below. Note that the number of pages in a reprint may be 

 affected somewhat by the make-up, and that part of a page is charged as a full page. Carriage charges 

 extra in all cases. Shipment by parcel post, express or freight as directed. 



One hundred separates or reprints at 34.00 per page or plate. A 50% reduction on the price of the 

 first hundred reprints is allowed on each article ordered and paid for by members. Additional hundreds 

 or less, 4 pages or less, $1.00; 5-8 pages, Si. 50; 9-12 pages, $2.00; 13-16 pages, 12.50; 17-24 pages, $3.50; 

 25-32 pages, $4.50. Covers suitably printed on first page only, 100 copies, or less, $5.00; additional 

 hundreds, or less, $2.00. Plates inserted, $2.00 per hundred, or less. Folio reprints, the uncut folded 

 pages (50 only), sixteen page signature, or less, $3.00. 



Have we reached the Hmit in methods of poisoning forest trees for 

 protection against leaf eating caterpihars? This question has been 

 raised by the remarkably successful results of last season in poisoning 

 the catalpa sphinx in Ohio and the fact that aeroplane dusting is being 

 tested in New Hampshire for the control of the Gipsy Moth. Those 

 familiar with the early work against this latter insect will recall the hand 

 and low powered equipment used at that time and the manifest dispropor- 

 tion between the apparatus and the size of the undertaking. Long 

 strides have been made since those days and the present high pressure 

 outfits with long Hnes of hose have greatly increased the range and 

 efficiency of such treatment. There are obvious limitations even to 

 these methods. It has been felt in the past that direct remedial measures 

 were impracticable under forest conditions and such may always prove 

 to be the case excepting, possibly in areas where there are unusually 

 high values, as for example within relatively short distances of great 

 centers of population. On the other hand, it is becoming increasingly 

 apparent that forests must be better protected or there will in the near 

 future be a dearth of wood and wood products, not to mention the part 

 these growths play in modifying stream flow and tempering climatic 

 conditions. There is a possibility of the economic entomologist in- 

 vading the air and working out a practical method of checking by arti- 

 ficial means imusual outbreaks of leaf feeders, possibly native as well 

 as introduced. Wide spread depredations of this character, it is gener- 

 ally conceded, result from a disturbance of natural relations and if this 

 is the case, it does not seem unreasonable to believe that a moderate to 

 somewhat thorough checking of the outbreak at its center would result 

 in reducing the pests to such an extent that natural agencies would take 

 care of the remainder. In other words, a somewhat superficial and from 



317 



