2G 2 
Toward the end of the month Dr,. Craignead State two days:at Madison, 
Wis., discussing with Dr. ZB, J: Xraus plans for -certain investigations which 
the latter will undertake for the Bordeu this summer, r. Kraus has been 
appointed to muke a preliminary study of ‘the: condition within bes tree which 
atfects its susceptibility’ to barkeheectie attack and influences brood develope 
ment. It is becoming more and more: evident from our studies that inany species } 
8 

of bark-beetles do not attack inciscriminately any trees in the forest, but 
that in many cases predisposing So Vee the tree are necessarye 
R, A, St. Georze spent a few days in :the early Bint of the month fol- 
Lame ne ae the condition of the droughtestricken timberland, areas in Mississippi) 
‘and Louisiana, It was.found that the unusual losses of iast fall have abated, — 
and practically no trees are now. dying. . 
q 
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4 
4 
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Mr. St. Ceorge heft Woshinston on April @ for the Aopalachtan Forest F 
Experiment Station, Asheville, Ce, where cooperative studies. relating to 
important insect problems in ne Mes cee have been started. 
While on a recent tsp eo Bo gatee Hayy Mrs ‘iecotes collected a 
large quantity of longleaf pine shoots (Pinus palustris) which were. heavily 
attacked by the Nantucket tip moth (Bhyacionia frustrana Comstock). This } 
riper as made for R, A.”’Cushman; who is: devoting ‘considerable time 
te ac laboratory: to studying tle parasites of this moth. 
's growth was heavily infested with young larvae. — : | 
Defoliation experiments on jack and Scotch. pines and larch are being | 
continued this year at. the Eastern Field Station, Hast Falls iveate =. Va. 
Already some very intcresting results HANS been obtained, 
L. G. Baumhofer has been sete ede Field Reet: to study the tip- 
moth infestation on the Halsey plantations, Nebraska National Forest... The 
work is being carried on under the direction of Dr, 5. ey Graham. ‘The 
Forest Service is cooperating and assisting financially. Mr. Cushman is 
collecting parasites which will. be introduced in an effort to control this 
unusually heavy infestation, 
A canipaign is being conducted « through correspondence and special 
articles in magazines, for the purpose of slightly modifying city build- 
ing regulations so as to protect new structures from damage by termites, 
Faulty const ‘ruction is the cause of practically all cases of infestation — } 
a buildings by termites. . If Householders realized this fact they would. . | 
insist on proper construction as a means of insurance against such damage. 
Under ‘present. conditions the householder pays !” shagh proper regulation, 
the architect or contractor ‘should pay $ 
TRUCK-CROP INSECT INVESTICAPIONS 
J. E. Graf, Entomologist, in Charge 
Bean J. E. Dudley, Jr., Associate Entomologist, has returned to his official 
auion at Madison, Wis,, from California, where he spent about two months 
easton tests under California conditions with the aphidozer on peas grown 
for cannery purposes. 

