981. 
983. 
984. 
985. 
986. 
987. 
988. 
939: 
990. 
. Peterson, L. O. T. 
ers, Inc., Ann Arbor, Mich. 
Peterson, L. O. T. 1948. Some 
aspects of poplar borer, Saperda 
calcarata Say, (Cerambycidae) 
infestations under parkbelt con- 
ditions. 78th Annu. Rep. Ento- 
mol. Soc. Ont. 1947, p. 56-61. 
1958. The 
boxelder twig borer, Proteoteras 
willingana (Kearfott), (Lepidop- 
tera: Olethreutidae). Can. Ento- 
mol. 90(11):639-646. 
Pierce, W. D. 1909. Studies of 
North American weevils. Proc. 
UeS Natl: Mus. 37(¢1708): 
325-364. 
Pilon, J. G. 1965. Bionomics of 
the spruce budmoth, Zeiraphera 
ratzeburgiana (Ratz.) Lepidop- 
tera: (Olethreutidae). Phy- 
toprotection 46(1):5-13. 
Pilon, J. G., and J. R. Blais. 
1961. Weather and outbreaks of 
the spruce budworm in the 
province of Quebec from 
HOS9=1956.-ECan> Entomol. 
93:118-123. 
Plumb, G. H. 1950. A new and 
serious insect pest of red pine. 
Conn. Agric. Exp. Stn., Spec. 
Circ., 4 p. 
Plumb, G. H. 1950. The adult 
feeding habit of some conifer- 
infesting weevils. Can. Ento- 
mol. 82(3):53-57. 
Plumb, G. H. 1953. The forma- 
tion and development of the 
Norway spruce gall caused by 
Adelges abietis L. Conn. Agric. 
Exp. Stn. Bull. 566, 77 p. 
Podgwaite, J. D., and H. M. 
Mazzone. 1981. Development 
of insect viruses as pesticides: 
The case of the gypsy moth (Ly- 
mantria dispar L.) in North 
AIMETICA. Prot: “Ecol: = 3: 
219-227. 
Podgwaite, J. D., K. S. Shields, 
and R. A. Lautenschlager. 1981. 
Epidemiology. /n The gypsy 
moth: research toward integrated 
pest management. C. C. Doane 
and M. L. McManus, eds. U.S. 
Dep. Agric. For. Serv., Sci. and 
O91: 
992 
993. 
994. 
996: 
OO: 
998. 
Boo: 
Educ. Agency, and Anim. and 
Plant Health Insp. Serv. Tech. 
Bull 1584, p. 482-487. 
Poinar Gi O. Jr1975._Ento- 
mogenous nematodes. 317 p. 
E. J. Brill, Publ., Leiden, The 
Netherlands. 
Pointing, Pode, “and Ge W: 
Green. 1962. A review of the 
history and biology of the Euro- 
pean pine shoot moth, Rhy- 
acionia buoliana (Schiff.) (Lep- 
idoptera: Olethreutidae), in On- 
tario. Proc. Entomol. Soc. Ont. 
92:58-69. 
Potts, S. F. 1958. Concentrated 
spray equipment, mixtures and 
application methods. 598 p. 
Dorland Books, Caldwell, N.J. 
Potts;:S. FE; and: R. Be Friend, 
1946. Mist blowers for applying 
concentrated’ spray: Conn. 
Agric. Exp: Stn: Bull sor, 
p. 47-60. 
5. Powell, J. A. 1962. Taxonomic 
Studies onthe, Ache ris 
gloverana-variana complex, the 
black-headed budworms (Lep- 
idoptera: Tortricidae). Can. En- 
tomol. 94(8):833-840. 
Powell, J. A. 1968. Host asso- 
ciations and taxonomy of Nearc- 
tic conifer cone moths of the 
genus Eucosma (Lepidoptera: 
Tortricidae). Huilgardia 
39(1):1-36. 
Powell, J. A. 1980. Nomen- 
clature of Nearctic conifer-feed- 
ing Choristoneura (Lepidoptera: 
Tortricidae): historical review 
and: present. .status:: U.S. Dep. 
Agric. For Serv. Gen, Tech, 
Rep. PNW-100, 18 p. Pacific 
Northwest For. & Range Exp. 
Stn., Portland, Oreg. 
Powell, J. A., and W. E. Miller. 
1978. Neartic pine tip moths of 
the genus Rhyacionia: bio- 
systematic review (Lepidoptera: 
Tortricidae, Olethreutinae). 
UxSauDep Agric, Agric: 
Handb. 514, 51 p. 
Prebble, M. L. 1941. The di- 
apause and related phenomena 
507 
