INSERT PEST SURVEY BULLETIN 
Vol. 3 " October 1. 19 23 No. 7 
OUTSTANDING ENTOMOLOGICAL FEATURES IN THE UNITED ST/TES FCR SEPTEMBER, 19 23 
&apwE$g made during September indicate that the Hessian fly is more abund- 
ant than usual over the southern third of Indiana and Illinois, and that the situa- 
tion is also threatening in i.Iisscuri ar.d Nebraska. 
Heavy rains in Illinois and Missouri reduced the seriousness of the heavy 
chinch bug infestations. Chinch bugs, however, are more numerous over the greater 
part of tne ghinch "bug belt, particularly in the northern limits, than last fall. 
The European corn borer infestation arpears to be increasing in intensity 
in Ohio. 
The garden webworm continues to be destructively abundant in alfalfa in 
Indiana, Illinois, and Nebraska, being especially serious on new plantings. 
The most serious outbreak of the cotton leaf-, orn that has occurred for 
several years is recorded this year throughout the Cotton Belt. Northern flights 
of the moths brought them into New England and the Lake Region between September 3 
and 15, where some damage was recorded to fruit, by the feeding of the moths. 
Of 340 points in the Cotton Belt reporting or. the boll weevil situation 
late in August and early in September, 173 reported serious damage by this pest. 
The birch leaf-skeletonizer is again reported as seriously damaging birch 
trees in Massachusetts , Connecticut, and southern Tew Hampshire . 
Spruce and fir have been seriously defoliated in parts of Idaho, California, 
and Wyoming by the spruce budworm. 
The bee louse has Deen found well established in Carroll County, Md. This 
is the first record cf this insect oeing actually established in this country, al- 
though it has been repeatedly introduced on imported queenbees . 
OUTSTANDING ENTOMOLOGICAL FEATURES FOR nANAD/l FOR SEPTEMBER, 19 23. 
The wheat _ stem sawfly appears to be still spreading in Manitoba and 
there is little doubt but that it is present in all the wheat growing areas in the 
province but only in small numbers in northwestern districts. This insect has 
not been as prevalent in the crops this year as in 1922, due to cool weather and 
the parasite Microbracon ceph i. which has oeen found in most of the worst cephus 
infested areas. 
The Hessian fly made no appreciable headway in eastern Canadian Prairies 
during the past season, despite our expectations of the spring. 
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