56 EXPERIMENT STATION RECORD. [Vol.37 



I. The gipsy moth in woods, by G. E. Clement (pp. 1-16). — The subject is 

 dealt with under the headings of behavior of the gipsy moth in the woods, 

 composition and condition of woods in Infested territory, feeding habits of 

 gipsy moth caterpillars, precautions needed, application of food plant data 

 to individual species, other measures in need of attention, and recommenda- 

 tions. A plan of procedure for woodland owners who wish to improve and 

 protect their woods is sug;:ested. 



II. Management of typical woodlots infested tcith the gipsy moth in the 

 white pine region, by W. Munro (pp. 17-54). — In this second paper an attempt 

 is made to coordinate the results of food plant experiments with known prin- 

 ciples of forest management and with economic conditions In the infested 

 region with a view to determining the extent to which forest management 

 may be relied upon in the control of the moth. The subject is dealt with under 

 the headings of susceptibility to gipsy moth attack as a basis of management, 

 other factors in management for moth control, some controlling factors in 

 management, trees which control, typical stands, and conclusions. 



Each lot and each combination of species presents a problem in which the 

 controlling factors are site, soil, location, market, species pre.sent, their value 

 and relative proportion, the degree of infestation, and the cost of labor. 



A map of the forest regions of New England showing their relation to the 

 region infeste<l by the gipsy moth, July 1, 1916. is attached. 



Further observations on the control of the fruit tree leaf roller in the 

 Hood River Valley. L. Childs (Oregon Sta. Bui. 11,1 (1917), pp. lS-27).—lii 

 further work with this Insect (Archips argyrospiln) ( E. S. R., 34. p. r)."i2 ; 35. p. 

 551), it was found that fair, settled weather for several days following spray- 

 ing is the most important factor in the destruction of its eggs. A continued 

 rainfall for four days following spraying was found to destroy the effectiveness 

 of the miscible oil. Emulsions made from eastern or paraffin-base oils spread 

 better than the western or asphaltum-base oils. The addition of 1 to 2 gal. 

 of liquid soap to 100 gal. of emulsion greatly Increased the spreading proper- 

 ties of the spray. "Oil sprays do not 'set' with the rapidity of other appli- 

 cations used in the apple orchard. Oil which could be remove<l by rains has 

 been found on the trees as long as a week after application — it must be con- 

 sltlered active while in this form. The other orchard sprays set within two 

 to eight hours and effectivene.ss from that time on is only slightly reduced by 

 continued raln.s." 



In trapping work, as many as 600 leaf roller moths wore caught during a 

 single night by a Tungsten electric light trap. Of these 95 per cent were 

 males, 3 per cent spent females, and 2 per cent female moths containing eggs. 



"Miscible oils used at the rate of 6: 100 during 1915 and 1916, though caus- 

 ing considerable foliage injury when use<l after the fruit buds begin to show, 

 have not Injured these buds in numbers sufficient to reduce the crop or to cause 

 any Injury to the tree other than slightly retarding Its development. In both 

 years a very high percentage of the eggs was destroye<l when the oils were 

 applli^l at this time. Oils applied late can usually be applied during a period 

 of warm settled weather." 



A new method of controlling the black-head fireworm, H. B. Scammell 

 (Proc. Amer. Cranberry Growers' Assoc., Jfl (1916). pp. S-12). — In the control 

 of Rhopobota vacciniana the author reconunends that the winter flowage be 

 withdrawn about May 10 In an effort to bunch the hatching of the fireworm 

 eggs. Nicotln sulphate should be applied at the rate of 200 gal. of spray per 

 acre at each application, the first application to be made about May 20, followed 

 in five days by a second application. Where there Is more than a scattering of 

 the second brood worms, a third application should be made when the majority 



