“17 
New England and New York for records on intensity of infestation and pera» 
Sitization, that in some instances a considerable number of larvae were re- 
- moved from their hiberne tion cases, presumably by birds, The highest per- 
. Ceutege of larvae thus removed was noted in a plot in Sydney, Maines, of 
400 cases examined the larvae had been removed from 170. A total of 3,380 
adults of a parasite, Angitia laricinella Strobl, ,of the larch case bearer 
that issued from material received from J. Fe Sellers of the Budapest, Hun- 
gary, sublaboratory, were liberated in four of these larch plots in Maye 
White grub investiga tionse--Re Ae Ste George, of the Asheville, N.Ce, 
_ field laboratory, reports that during the latter part of May He Re Johnston, 
& graduate of Ne C. State College, was transferred to this division to as- 
sist in the white grub project being conducted in cooperation with the State 
forest nurseri¢s located at Clayton, NeCe, and at Camden and Georgetown, S.Ce 
Intensive life-history studies have been begun to determine the life cycle of 
those species found to be of :economie importance. Tests are also kheing con-= 
tinued to determine which chemicals are most satisfactory to use in the pre 
. vention and control of May beetlé'damagee | Preliminary results indicate that 
dosage of acid lead arsenate applied to quite acid light sandy loams, at a 
rate of 1,500 or more pounds per acre, remain in the soil in sufficient 
amounts, even after 2 years, to cause a marked effect on the germination of 
pine and locust seeds and a stunting of growth of the seedlings. 
As the result of excess rainfall during the past 2 weeks at the new 
Georgetown, S.C., nursery, Phyllophaga lervae have been quite active causing 
considerable damage to the pine seedlings, which have attained a height of 
only 4 to 6 inches. © The grubs present are those that occur naturally under 
the patches of grass in the young longleaf pine stands. This injury is being 
kept at a minimum through the use of miscible carbon bisulphide. It has been 
determined that dosages of 1 quart to 50 gallons of water, using 43 pints per 
_. Square foot of soil surfaee,are effective. ; 
Ce Be Baton, a recent graduate from New York State College of Forestry, 
reported for duty at Asheville, NeCe, on June 1, to assist in the southern 
pine bectle studies being conducted at the Bent Creek laboratorye 
Winter killing of southern pine beetlee=~Re Ae St. George also reports 
that a recent check-up of the effect of subzero temperatures on overwintering 
broods of the southern pine beetle (Dendroctonus frontalis Zimms) in short~ 
leaf, pitch, and scrub pine trees near Fairfax, Va., verifies previous es- 
timates of nearly a complete winter mortality of all stages of the brood. 
Only a very few eggs, found occasionally in the south side of a tree, were 
able to survive. No new attacks have been found so far this season, 
Control against mountain pine beetle successfule~-J. A. Beal, of the 
Portland, Oreg., fisld laboratory, writes that the infestation of Dendroctonus 
monticolae in the highly scenic areas of Mount Rainier National Park has been 
sucessfully controlled again this spring as shown in the small number of new 
infested trees fond. This infestation has been reduced from a yearly loss 
of over 1,000 infested pines in 1941 to less than 100 trees for the past 2 
years. This year only 75 new trees could be found. 
