flora of the Wolf Islands, New 

 Brunswick, and made a floristic com- 

 parison of three bird islands in the 

 Gulf of Maine. 



Plant Pathology was not included 

 in the name of the department until 

 1973, but A. E. Rich and his graduate 

 students and associates were produc- 

 tive researchers having published some 

 20 research papers during this decade. 

 Their investigations concerned pri- 

 marily the identification and control 

 of viral and fungal diseases of potatoes, 

 apples, and strawberries. But they also 

 documented that use of highway salt 

 in winter for control of icing resulted 

 in injury to roadside trees. They attrib- 

 uted the decline of maples along U.S. 

 Route 4 in Northwood, N.H. to severe 

 salt injury, and found that some tree 

 species were more tolerant to chloride 

 than others. 



Plant growth, maturity and repro- 

 duction are dramatically influenced 

 by the wavelength, intensity and du- 

 ration of light. This was shown by S. 

 Dunn, physiologist, and his colleagues 

 using various species of plants. Later 

 research revealed that light influenced 

 the accumulation of carbohydrates and 

 alcohol-soluble constituents in leaves. 



R. W. Schreiber's investigations 

 centered on the chloroplast, seat of 

 photosynthesis and starch and nucleic 

 acid formation in higher plants — and 

 more specifically on in vivo synthesis 

 of lipoprotein in the membranous 

 network of the chloroplast. 



Station scientist A. C. Mathieson 

 studied the composition, seasonal oc- 

 currence and reproductive periodic- 

 ity of benthic marine algae (photosyn- 

 thetic, lower plants occurring on the 

 bottom underlying a body of water) in 

 New Hampshire, Newfoundland and 

 the Chesapeake Bay regions. 



Entomology 



The association of distance to the in- 

 tensity of foraging of honey bees on 

 natural food sources was studied by 

 W. R. Lee, who found that the relative 

 attractiveness of a food source de- 

 creased rapidly as the distance from 

 the apiary increased. 



R. L. Blickle described a new spe- 

 cies of Hydroptibidae (caddis fly) 

 found in New Hampshire and Maine; 

 R. M. Reeves and V. G. Marshall re- 

 described Brachychthonius lydiae 

 (mites); J. E. Kierans reported on some 

 avian ectoparasites found on birds of 

 New England; and H. B. White and W. 

 J. Morse consolidated the literature on 

 some 130 species of Odonata (drag- 

 onflies) in the state, 23 of these being 

 reported for the first time. 



Forest Resources 



Forests are an abundant natural re- 

 source in New Hampshire and eastern 

 white pine is an important forest spe- 

 cies here. Because it requires many 

 years to reach maturity, however, for- 

 esters need reliable ways of arriving at 

 estimates of future yields. J. P. Barrett 

 and his associates researched methods 

 of predicting growth and yield of vari- 

 ous sized stands of forest trees, ways of 

 improving the accuracy of their esti- 

 mates, and various techniques of sam- 

 pling trees in a stand. 



Forest land resources and outdoor 

 recreation activities could and should 

 figure significantly in the state's total 

 future economic growth, and B. B. 

 Foster, forest economist, urged critical 

 examination of the roles these re- 

 sources should take. He also researched 

 the profitability of Christmas tree 

 plantations, and used linear program- 

 ming techniques to arrive at least-cost 

 blends or mixes in paper making. 



49 



