February, '15] 



EXTO^IOLOGICAL IX^'ESTIGATIONS 



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Kmisas, Manhattan, — -Geo. A. Dean. 

 Relation of climate to injurious insects. Geo A. Dean and J. W. ]\IcColloch. 

 Measures of controlling mill and stored grain insects. Geo. A. Dean. 



Maryland, Baltimore,^ — Scott. 

 Development of a di-y material for use as a substitute for lime-sulphur solution. 

 Begun 1913. 



Experiments with arsenate of lime or calcium arsenate as a substitute for arsenate of 

 lead. Begun 1913. Xearh' completed. 



Massachusetts, Amherst, — H. T. Fernald. 



Causes producing burning of foHage by insecticides. Progress satisfactory. 



Real amount of benefit obtained from different groups of parasites. Progress satis- 

 factory. 



Distribution limits of pests in Massachusetts. Progress satisfactory. 

 Strength of fumigation safe on different gi-eenhouse crops as compared with strength 

 necessary for destruction of the pests. Temporarih' discontinued. 



Michigan, East Lansing,— R. H. Pettit. 

 How contact insecticides kill. E. G. Shafer in immediate charge. 

 Life histories and control of various fruit and field crop insects. 



Life histories and control of insects injurious to "^Michigan forests and shade trees. 

 G. C. Good-^in in immediate charge. 



Missouri, Columbia,— L. Haseman. 

 Life histories, distribution, injury and control of insects affecting nursery stock. 



Nebraska, Lincoln, — ]M}Ton H. Swenk. 

 The role of insects in tripping alfalfa blossoms and effect of tripping on size of seed 

 crop. Progress satisf actor}'. Preliminary pubUcation contemplated. 

 A monographic account of the insect enemies of alfalfa. Progress satisfactory. 



New Jersey, Xer. Brunswick, — T. J. Headlee. 

 Spraying and dusting investigations: Effectiveness of certain new dusts in con- 



trolhng insects and diseases affecting orchard fruits and potato fohage; former this 



3^ear in charge department of plant pathology and latter in charge of department 



of entomology. H. B. Weiss, C. H. Richardson and T. J. Headlee in 1913; Alfred 



E. Cameron in 1914. See reports for 1913, and 1914. 

 Climatic and insect investigations : Effec t of maximum and minimum temperatures 



on various seriously injurious insects. C. H. Richardson and T. J. Headlee. No 



printed records of progress thus far. 

 Insect control: Facts relative to importation of injurious insects from Foreign 



countries; control of outbreaks of established insects. H. B. Weiss and T. J. 



Headlee. See reports for 1913, 1914. 



New York, Albany,— E. P. Felt. 

 Factors influencing distribution and abundance of insects. Considerable data 



accumulated, not much published. Begun in 1899. 

 Effect of applications of petroleum or petroleum compounds to dormant trees. Much 



published, investigations still in progress. Begun in 1911. 



New York, Cornell L'niversity, Ithaca, — Glenn W. Herrick. 

 Insects injmious to hops in New York. I. M. Hawley in charge. Work just begun. 

 Insects injurious to clover. C. H. Hadley,, Jr., in charge. 



New York, Geneva, — P. J. Parrott, and W. J. Schoene. 

 Insecticidal properties of various sulphides and poh'sulphides. 



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