Parathione is Effective in the Con- 

 trol of the Eye-Spotted Bud Moth. 

 Parathione was used on apple trees 

 to control the eye-spotted bud moth. 

 The material was employed at the 

 rate of two pounds of 15 per cent 

 wettable powder to 100 gallons of 

 water. It was applied in the dor- 

 mant, delayed dormant, and pink 

 sprays. The degree of contact was 



excellent, and definitely superior to 

 either nicotine or DN. Parathione 

 seemed to have an advantage in that 

 it can cause high mortality even after 

 the bud moth larvae have penetrated 

 rather deeply into the swelling or 

 opening buds. 



J. G. Conklin, W. C. O'Kane, 

 R. L. Buckle and W. J. Morse 



Forestry 



The Amount of Wood Waste is 

 High in the Manufacture of Heels 

 and Cooperage Products. The De- 

 partment of Forestry at the Univers- 

 ity of New Hampshire and the En- 

 gineering Experiment Station have 

 been studying the supply of low- 

 grade wood available for manufac- 

 turing plastics. During the past 

 year two wood-using industries were 

 studied — manufacturers of wooden 

 heels and white pine cooperage pro- 

 ducts. The data showed that 32 per 

 cent of the lumber purchased for the 

 manufacture of shoe heels became 

 waste during the first two operations 

 i.e., cross cutting and ripping. In 

 cutting up white pine logs for coop- 

 erage products, it was found that 

 22 per cent of the log was unusable 

 for further manufacture. During 10 

 other processes, the loss incurred in 

 individual operations ran as high as 

 33 per cent on the basis of weight 

 before and after the manufacture of 

 the pieces. It appeared that the 

 waste could be reduced considerably 

 by the use of higher quality raw ma- 

 terial. 



L. C. Swain 



The Broivn Color of Maple Syrup 

 is Caused by the Heating That Occurs 

 During Evaporation. The Forestry 

 Department in co-operation with the 

 Engineering Experiment Station has 

 been collecting sap from various se- 

 lected maple trees near Durham to 



study various characteristics of sap 

 flow. Some of the sap collected was 

 evaporated in a vacuum at a temper- 

 ature of 120° F. By evaporating the 

 sap at such a low temperature a 

 nearly colorless syrup resulted. Ac- 

 cording to Dr. J. Seiberlich, re- 

 search assistant professor at the En- 

 gineering Experiment Station, who 

 actually made the syrup, the maple 

 flavor was even more intense than 

 in syrup made in the usual manner. 

 Plans are underway to conduct addi- 

 tional studies this coming year. 

 C. L. Stevens 



The Effect on the Maple Tree of 

 the Kind of Spout Used and the 

 Treatment of the Tap Hole. An in- 

 vestigation has been made to deter- 

 mine the effect on the tree of the type 

 of spout used and the treatment giv- 

 en the tap hole after the spout has 

 been removed. Two small sugar 

 maples were tapped, each one in 20 

 places, and spouts of metal, wood, 

 and rubber were used. Some of the 

 holes were left without spouts. The 

 trees were cut in the fall and split 

 for detailed study. The holes in 

 which metal spouts were used showed 

 the greatest amount of stain in the 

 wood; the least staining occurred 

 around the holes without spouts. 

 Wood and rubber were both inter- 

 mediate in their effect upon staining. 



After the spouts were removed the 

 holes were washed with ethvl alcohol, 



16 



