12a P.D. 31 



Botany. 



1. Optimum conditions of light for plant response. Assistant Professor 0. L. 

 Clark. Discontinued on account of resignation of Professor Clark from the 

 Station staff. 



5. Experimental spraying for control of cucumber mildew under glass. Professor 

 A. V. Osmun. Merged with Project 18. 



6. Investigation of onion diseases. Professor A. V. Osmun. Completed. 

 Results reported in Technical Bulletin 4, "Development and Pathogenesis of the 

 Onion Smut Fungus"; Bulletin 221, "The Smut Disease of Onions"; Scientific 

 Contributions 4, "An Improved Formaldehyde Tank for the Onion Drill"; 15, 

 "The Relation of Soil Moisture to Formaldehyde Injury of Onion Seedlings"; 

 32, "Controlling Onion Smut with Kalimat"; 42, Comparative Susceptibility of 

 Onion Varieties and of Species of AUium to Urocystis Cepulae"; Bulletin 227, 

 article entitled "Onion Blight or Downy Mildew." 



14. Investigation on control of tobacco wildfu'e. Research Professor P. J. 

 Anderson. Completed, results reported in Bulletins 203, "Tobacco Wildfire — 

 Prehminary Report of Investigations"; 213, "Tobacco Wildfire in 1922"; Scientific 

 Contributions 27, "Overwintering of Tobacco Wildfire Bacteria in New England"; 

 and 33, "Susceptibility of Nicotiana Species, Varieties and Hybrids to Tobacco 

 Wildfire." 



16. Relation of soil character to occurrence of onion smut. Research Professor 

 P. J. Anderson. Completed. For reports, see bulletins and articles Usted under 

 Project 6. 



17. Study of apple black rot control and the dusting schedule. Research 

 Professor W. L. Doran. Completed, results published in Bulletin 222, "Ex- 

 periments on the Control of Apple Scab and Black Rot and Spray Injury in 1924." 



20. Investigation of nematode eradication in greenhouse soils by the use of 

 calcium cyanide. (In cooperation with American Cyanamid Company.) Assist- 

 ant Research Professor L. H. Jones. Superseded by Project 21. 



Plant and Anmial Chemistry. 



22. Determining the nutritive value of hydrolized sawdust. Professor J. B. 

 Lindsey and Assistant Research Professor J. G. Archibald. Completed, results 

 published in Scientific Contribution 48, "The Composition, Digestibility and 

 Feeding Value of Hydrolized Sawdust." 



23. Study of coloring matter in cranberries. Research Professor F. W. Morse. 

 Manuscript submitted for publication. 



Cranberry. 



6. Cranberry bud development investigation. D. S. Lacroix. Completed. 

 Results published in Scientific Contribution 50, "Cranberry Flower-Bud Investiga- 

 tions." 



Dairy Manufactures. 



1. Determining factors influencing volume weight in ice-cream. Assistant Re- 

 search Professor A. W. Phillips. Completed, manuscript submitted. 



Entomology. 



4. Control of squash vine borer. Assistant Professor H. N. Worthley, Com- 

 pleted, results published in Bulletin 218, "The Control of the Squash Vine Borer 

 in Massachusetts." 



5. Control of the squash bug. Assistant Professor H. N. Worthley. Dis- 

 continued. Reports published in Scientific Contributions 7, "The Squash Bug in 

 Massachusetts {Anasa tristis De Geer) with Notes on the Parasite Trichopoda 

 pennipes (Dipt., Tach.)"; 19, "The Biology of Trichopoda pennipes Fab. (Diptera, 

 Tachinidae), a Parasite of the Common Squash Bug." 



9. Number of generations of codling moth in Massachusetts and whether spraying 

 for a second generation is advisable. Assistant Research Professor A. I. Bourne. 

 Completed, manuscript nearly ready for publication. 



13. Study of possible injurious effects of Scalecide on trees. Assistant Re- 

 search Professor A. I. Bourne. Preliminary report in Bulletin 226, entitled "Some 

 Results from Spraying with Scalecide"; final report being prepared. 



14. Does spraying orchards kill bees? Assistant Research Professor A. I. 

 Bourne. Completed, manuscript nearly ready for publication. 



