

15 oW 
Imported parasites of corn borer show promise in Massachusetts .-—- 
W. G. Bradley and assistants, Arlington, Mass., have completed the spe- 
cial study of one specific field in Lexington, Mass., and submit the 
more pertinent facts in regard to the parasitization of European corn 
borers in this field: 
"Total number of borers in the field...8,765 
Number of adults produced... sees 5,469, or 62.4 percent 
Masicera senilis Rond. present............. 216, or 2.46 percent 
inareolata punctoria Roman present... 1,046, or 11.93 percent 
monillia mitis Meig. presen. ate... 2015 vor’ 1 19° spercens 
Zenillia roseanae B. B. present....... 1, or Q.011 percent 
Nemorilla floralis Fall. present........... 8} “or .O91 percent 
Undertermined parasites present............. 4, or .046 percent 
Ropawoparasi tes: veh we ee: AAS 1,376, or 15.7 percent 
Narpom Oinacaditanvae seg. dette: 1,920 ror’ onl. 9? percenc 
Birds reduce numbers of corn borers in Indiana.--L. G. Jones, of the 
European corn borer laboratory, Monroe, Mich., reports that "20 fields 
selected at random, covering an area of 38 square miles about the York town- 
ship, Steuben County, Ind., liberation point, were sampled to ascertain 
the percentage of borers destroyed by birds. The borer population was 6 
per 100 stalks in this area. A sample consisted of 100 infested plants 
from each field (25 infested plants taken from each of the four quarters). 
* * * Eighteen of the 20 fields sampled showed 'bird—pecked' stalks rang- 
ing from 6 percent to 62 percent per 100 infested plants. Two fields 
showed no signs of bird-pecked plants, while 5 fields showed reductions 
above 50 percent. The average borer reduction for the 20 fields was 30 
percent in all stalks under observation." 
Fluoroscope fails to reveal corn borers in green plants.—~—According 
to L. H. Patch, Sandusky, Ohio, "One of the routine jobs requiring tem— 
porary assistance and punctual attention is the dissection of corn plants 
in August to determine the borer populations before the borers migrate. 
G. W. Still's attention was drawn to the published results of counting 
the number of cotton seeds infested by the pink bollworm by means of the 
fluoroscope. Recently a demonstrator * * * came to the laboratory with 
a new type of portable X-ray equipment to test the possibilities of 
counting corn borers within stalks of corn. It was found that the num— 
ber of borers within dry stalks of corn could be counted quickly and ac— 
curately by means of the X-ray and fluoroscope, but when green stalks 
were substituted for the dry stalks the visibility of the borers was 
greatly reduced. More detailed tests of the adaptability of the equip- 
ment will be made during the coming season." 
COTTON INSECTS 
Winter survival of field cricket.—-Reporting on the overwinter- 
ing of Gryllus assimilis pennsylvanicus Fab., one of the minor pests 
of cotton which sporadically causes considerable damage by feeding on 
young seedlings, J. W. Folsom, P. A. Woke, and L. H. Stubblefield, Tal- 
