was developed and certain of tlie environmental conditions necessary for 

 erovvth were determined. Studies on the fermentation of cellulose were 

 carried out and the fermentation products elaborated were ethyl alcohol, 

 acetic acid, butyric acid, CO^ and H-j. Reducing sugars were noted in the 

 culture fluids after fermentation, but it was not possible to establish 

 whether these were glucose, celloboise, or both. 



E. Katz 



OTHER ACTIVE PROJECTS 



Diagnosis and Control of Vibriosis 

 in New Hampshire Dairy Herds 



L. ^^^ slaxetz 



Botany 



New Tomato Varieties Resistant to Late Blight 



Tomato late blight is a serious threat to both the commercial tomato 

 grower and home gardener, and at times it may completel}' destroy the 

 crop. Resistant lines have been developed which are not attacked by the 

 common strains of the late blight. The resistant tomato strains have been 

 backcrossed onto standard varieties in order to increase fruit size and 

 improve the horticultural charactertistics. At present progenies from these 

 crosses are being further tested for late blight resistance, and some of them 

 look verv promising. 



A. E. Rich 



Possibilities of Propagating High 

 Sugar-Producing Types of Sugar Maples 



Eight hundred maple cuttings were prepared from the spring growth 

 of high sugar-producing trees in June. 1952. Seventy percent of these were 

 given quick-dip hormone treatments and thirty percent were used as con- 

 trols. The cuttings were placed in sand in a greenhouse ground bed, and 

 a constant mist was kept over them throughout the summer. 



Bv the middle of October, 30 percent of the cuttings had rooted. Of 

 the five hormones used, three showed a higher percentage of rooting than 

 did the controls. Certain trees gave consistently higher percentages of 

 rooting than did others- 



The rooted cuttings were placed in an underground storage pit for 

 the winter, and planted in the spring of 1953 to field plots. 



S. Duxx 



Seasonal Effects of Witchgrass (Quackgrass) Control with TCA 



In 1952 three series of randomized plots each of 100 square feet area 

 were treated with sodium trichloroacetate. One series was treated on May 

 30, another on July 25, and the last on November 7 and 8. At each time 

 three different concentrations of TCA were used. ^, ^, and % pounds 

 of TCA per plot. The appropriate amount of material was applied in one 

 gallon of water solution. The fall treatments were relatively ine.Tective. 

 the low concentration { y^ pound) was much more effective in July than 

 in late May. At higher concentrations there were no pronounced differ- 



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