Arthropod
Managment in Fruit Crops
ENT 4984
Updated 27 February 2003
Lecture 6:
Insects on Other Tree Fruits; Biology & Management
I. Pear
II. Cherry
IV. References
- Adams, R. G. & L. M. Los. 1989. Use of
sticky traps
and limb-jarring to aid in pest management decisions for summer
populations
of the pear psylla (Homoptera: Psyllidae) in Connecticut. J. Econ.
Entomol.
82: 1448-1454.
- Alford, D. V. 1984. A Colour Atlas of Fruit
Pests: Their
Recognition, Biology and Control. Wolfe, Glasgow. 320 p.
- Anon. 1989. Pears: Using mating disruption
to
control
codling moth. Good Fruit Grower 40(3): 20.
- Armand, E., A. Lyoussoufi & R. Rieux.
1991.
Évolution
du complexe parasitaire des psylles du poirier Psylla pyri et Psylla
pyrisuga (Homoptera: Psyllidae) en vergers dans le sud-est de la
France
au cours de la période hivernale, printanière et estivale.
Entomophaga 36: 287-294.
- Batiste, W. C. 1972a. Integrated control of
codling
moth on pears in California: A practical consideration where moth
activity
is under surveillance. Environ. Entomol. 1: 213-218.
- Batiste, W. C. 1972b. Integrated control of
codling
moth on pears in California: Effects of varying dosage of
azinphosmethyl
and oil with individual cover sprays. Environ. Entomol. 1: 503-508.
- Batiste, W. C., A. Berlowitz & W. H.
Olson.
1970.
Evaluation of insecticides for control of the codling moth on pears in
California and their usefulness in an integrated control program. J.
Econ.
Entomol. 63: 1457-1462.
- Bell, R. L. & L. C. Stuart. 1990.
Resistance
in
eastern European Pyrus germplasm to pear psylla nymphal
feeding.
HortScience 25: 789-791.
- Bergh, J. C. & G. J. R. Judd. 1993.
Degree-day model
for predicting emergence of pear rust mite (Acari: Eriophyidae)
deutogynes
from overwintering sites. Environ. Entomol. 22: 1325-1332.
- Bethell, R. S. & W. W. Barnett. 1978.
Insect
and
mite pests. p. 9-132. In: Pear Pest Management. Univ. Calif.
- Biddinger, D. J. & E. G. Rajotte. 1995.
Cherry -
Indirect pests. p. 64-66. In: Hogmire, H. W. (ed.).
Mid-Atlantic
Orchard Monitoring Guide. NRAES 75.
- Blackman, R. L. & V. F. Eastop. 1984.
Aphids
on
the World's Crops: An Identification Guide. Wiley, N.Y. 466 p.
- Boller, E. F., R. Schoni & G. L. Bush.
1987.
Oviposition
deterring pheromone in Rhagoletis cerasi: Biological activity
of
a pure single compound verified in semi-field test. Entomol. Exp. Appl.
45: 17-22.
- Brunner, J. F. 1975. Economic injury level
of
the pear
psylla, Psylla pyricola Forster, and a discrete time model of a
pear psylla-predator interaction. Ph.D. dissertation, Wash. State Univ.
94 p.
- Brunner, J. F. 1981. Sampling techniques and
action
thresholds for pear psylla. Proc. Wash. Hortic. Assoc. 77: 190-194.
- Brunner, J. F. & E. C. Burts. 1975.
Searching behavior
and growth rates of Anthocoris nemoralis (Hemiptera:
Anthocoridae),
a predator of the pear psylla, Psylla pyricola. Ann. Entomol.
Soc.
Am. 68: 311-315.
- Brunner, J. F. & E. C. Burts. 1981.
Potential of
tree washes as a management tactic against the pear psylla. J. Econ.
Entomol.
74: 71-74.
- Brunner, J. F., and A. J. Howitt. 1981. Tree
Fruit Insects.
Mich. St. Univ. NCR Ext. Publ. 63. 60 p.
- Burckhardt, D. & I. D. Hodkinson. 1986.
A
revision
of the west Palaearctic pear psyllids (Hemiptera: Psyllidae). Bull.
Entomol.
Res. 76: 119-132.
- Burts, E. C. 1965. Dormant season control of
the
pear
psylla. Proc. Wash. State Hortic. Assoc. 61: 139.
- Burts, E. C. 1968. An area control program
for
the pear
psylla. J. Econ. Entomol. 61: 261-263.
- Burts, E. C. 1970a. Biology of blister
mites, Eriophyes
spp., of pear and apple in the Pacific Northwest. Melanderia 4: 41-53.
- Burts, E. C. 1970b. The pear psylla in
central
Washington.
Wash. Agric. Exp. Stn. Circ. 516. 13 p.
- Burts, E. C. 1971. Anthocoris nemoralis
- a new
predator for control of pear psylla. Proc. Wash. State Hortic. Assoc.
67:
110-112.
- Burts, E. C. 1985. SN 72129 and avermectin
B1,
two new
pesticides for control of pear psylla, Psylla pyricola
(Homoptera:
Psyllidae). J. Econ. Entomol. 78: 1327-1330.
- Burts, E. C. & J. F. Brunner. 1981.
Dispersion statistics
and sequential sampling plan for adult pear psylla. J. Econ. Entomol.
74:
291-294.
- Burts, E. C. & W. R. Fischer. 1967.
Mating
behavior,
egg production, and egg fertility in the pear psylla. J., Econ.
Entomol.
60: 1297-1300.
- Burts, E. C., & W. B. Hill. 1987.
Bibliography of
psyllids attacking pear trees. Melanderia 45: 1-18.
- Burts, E. C. & A. H. Retan. 1969.
Detection
of pear
psylla. Wash. State Univ. Ext. Mimeo 3069. 2p.
- Burts, E. C., H. E. van de Baan & B. A.
Croft. 1989.
Pyrethroid resistance in pear psylla, Psylla pyricola Foerster
(Homoptera:
Psyllidae), and synergism of pyrethroids with piperonyl butoxide. Can.
Entomol. 121: 219-223.
- Butt, B. A., L. C. Stuart & R. L. Bell.
1988. Feeding
behavior of pear psylla (Homoptera: Psyllidae) nymphs on susceptible
and
resistant Pyrus germplasm. J. Econ. Entomol. 81: 1394-1397.
- Butt, B. A., L. C. Stuart & R. L. Bell.
1989. Feeding,
longevity, and development of pear psylla (Homoptera: Psyllidae) nymphs
on resistant and susceptible pear genotypes. J. Econ. Entomol. 82:
458-461.
- Campbell, C. A. M., M. A. Easterbrook &
A.
J. Fisher.
1989. Effect of the plant growth regulators paclobutrazol and
chlormequat
chloride on pear psyllid (Cacopsylla pyricola (Foerster)) and
pear
rust mite (Epitrimerus piri (Nal.)). J. Hortic. Sci. 64: 561-564.
- Carlson, F. W. & E. J. Newcomer. 1948.
Habits and
control of the pear psylla in Washington. Proc. Wash. State Hortic.
Assoc.
44: 139-141.
- Chang, J. F. & B. J. R. Philogène. 1976.
The development and behavior of the pear psylla, Psylla pyricola
(Homoptera: Psyllidae) on different pear rootstocks and cultivars.
Phytoprotection
57: 137-149.
- Clark, L. R. & M. J. Dallwitz. 1974. On
the
relative
abundance of some Australian Psyllidae that coexist on Eucalyptus
blakelyi.
Aust. J. Zool. 22: 387-415.
- Clark, L. R. & M. J. Dallwitz. 1975. The
life system
of Cardiaspina albitextura (Psyllidae), 1950-74. Aust. J. Zool.
23: 523-561.
- Croft, B. A., E. C. Burts, H. E. van de
Baan, P.
H.
Westigard & H. Riedl. 1989. Local and regional resistance to
fenvalerate
in Psylla pyricola Foerster (Homoptera: Psyllidae) in western
North
America. Can. Entomol. 121: 121-129.
- Croft, B. A. & S. C. Hoyt. 1978.
Considerations
for the use of pyrethroid insecticides for deciduous fruit pest control
in the U.S.A. Environ. Entomol. 7: 627-630.
- Dively, G. P. & E. G. Rajotte. 1995.
Pear -
Direct
pests. p. 44-45. In: Hogmire, H. W. (ed.). Mid-Atlantic Orchard
Monitoring Guide. NRAES 75.
- Easterbrook, M. A. 1978. The life-history
and
bionomics
of Epitrimerus piri (Acarina: Eriophyidae) on pear. Ann. Appl.
Biol.
88: 13-22.
- Fields, G. J. 1971. Coexistence of three
species
of Anthocoris
(Hemiptera: Anthocoridae) in pear orchards in the Okanagan Valley of
British
Columbia. M.S. thesis, Simon Fraser Univ., Burnaby, BC. 111 p.
- Fields, G. J. & B. P. Beirne. 1973.
Ecology
of anthocorid
(Hemipt.: Anthocoridae) predators of the pear psylla (Homopt.:
Psyllidae)
in the Okanagan Valley, British Columbia. J. Entomol. Soc. B.C. 70:
18-19.
- Fields, G. J., R. W. Zwick & H. R.
Moffitt.
1981.
A bibliography of Psylla (Homoptera: Psyllidae) on pear trees.
USDA
Bibliogr. Lit. Agric. Ser. 17: 13 p.
- Flexner, J. L., P. H. Westigard, P.
Gonzalves
&
R. Hilton. 1991. The effect of groundcover and herbicide treatment on
twospotted
spider mite density and dispersal in southern Oregon pear orchards.
Entomol.
exp. appl. 60: 111-123.
- Frischknecht, M., W. Jucker, M. Baggiolini
&
A.
Schmid. 1978. Mode of action and practical possibilities of an insect
growth
regulator with juvenile hormone activity in pear psyllid control. Z.
Pflanzenkr.
Pflanzensch. 85: 334-340.
- Fye, R. E. 1981. Rearing and release of
coccinellids
for potential control of pear psylla. USDA-ARS Adv. Agric. Tech.
Western
Ser. No. 20. 9 p.
- Fye, R. E. 1983a. Cover crop manipulation
for
building
pear psylla (Homoptera: Psyllidae) predator populations in pear
orchards.
J. Econ. Entomol. 76: 306-310.
- Fye, R. E. 1983b. Impact of volcanic ash on
pear
psylla
(Homoptera: Psyllidae) and associated predators. Environ. Entomol. 12:
222-226.
- Fye, R. E. 1985. Corrugated fiberboard traps
for
predators
overwintering in pear orchards. J. Econ. Entomol. 78: 1511-1514.
- Hagen, K. S. & S.H. Dreistatd. 1990.
First
California
record for Anthocoris nemoralis (F.) (Hemiptera-Anthocoridae),
a
predator important in the biological control of psyllids
(Homoptera-Psyllidae).
Pan-Pacific Entomol. 66: 323-324.
- Hagley, E. A. C. & C. M. Simpson. 1983.
Effect of
insecticides on predators of the pear psylla, Psylla pyricola
(Hemiptera:
Psyllidae), in Ontario. Can. Entomol. 1409-1414.
- Harries, F. H. & E. C. Burts. 1965.
Insecticide
resistance in the pear psylla. J. Econ. Entomol. 58: 172-173.
- Harris, M. K. & R. C. Lamb. 1973.
Resistance
to
the pear psylla in pears with Pyrus ussuriensis lineage. J. Am.
Soc. Hortic. Sci. 98: 378-381.
- Herard, F. 1986. Annotated list of the
entomophagous
complex associated with pear psylla, Psylla pyri (L.) (Hom.:
Psyllidae)
in France. Agronomie 6: 1-34.
- Herbert, H. J. 1979. Population trends and
behavior
of the pear rust mite, Epitrimerus pyri (Prostigmata,
Eriophyoidea),
on pears in Nova Scotia. Can. Entomol. 111: 955-957.
- Hodkinson, I. D. 1974. The biology of the
Psylloidea
(Homoptera): A review. Bull. Entomol. Res. 64: 325-339.
- Hodkinson, I. D. & I. M. White. 1981.
The
neotropical
Psylloidea (Homoptera: Insecta): An annotated checklist. J. Nat. Hist.
15: 491-523.
- Horsburgh, R. L. 1995. Cherry - Direct
pests. p.
63. In:
Hogmire, H. W. (ed.). Mid-Atlantic Orchard Monitoring Guide. NRAES 75.
- Horton, D. R. 1990a. Distribution and
survival
of eggs
of summerform pear psylla (Homoptera: Psyllidae) affected by leaf
midvein.
Environ. Entomol. 19: 656-661.
- Horton, D. R. 1990b. Oviposition by
overwintering morph
of pear psylla (Homoptera: Psyllidae) with information on conditioning.
Environ. Entomol. 19: 357-361.
- Horton, D. R. 1994. Relationship among
sampling
methods
in density estimates of pear psylla (Homoptera: Psyllidae):
Implications
of sex, reproductive maturity, and sampling location. Ann. Entomol.
Soc.
Am. 87: 583-591.
- Horton, D. R., E. C. Burts, T. R. Unruh, J.
L
Krysan,
L. B. Coop & B. A. Croft. 1994a. Phenology of fall dispersal by
winterform
pear psylla (Homoptera: Psyllidae) in relation to leaf fall and
weather.
Can. Entomol. 126: 111-120.
- Horton, D. R., B. S. Higbee & J. L.
Krysan.
1994b.
Postdiapause development and mating status of pear psylla (Homoptera:
Psyllidae)
affected by pear and nonhost species. Ann. Entomol. Soc. Am. 87:
241-249.
- Hoyt, S. C., P. H. Westigard & E. C.
Burts.
1978.
Effects of two synthetic pyrethroids on the codling moth, pear psylla,
and various mite species in northwest apple and pear orchards. J. Econ.
Entomol. 71: 431-434.
- Jeppson, L. R., H. H. Keifer & E. W.
Baker.
1975.
Mites injurious to economic plants. Univ. Cal., Berkeley. 614 p.
- Jones, V. P. & D. W. Davis. 1989.
Evaluation
of
traps for apple maggot (Diptera: Tephritidae) populations associated
with
cherry and hawthorn in Utah. Environ. Entomol. 18: 521-525.
- Jones, V. P., D. W. Davis, S. L. Smith &
D.
B. Allred.
1989. Phenology of apple maggot (Diptera: Tephritidae) associated with
cherry and hawthorn in Utah. J. Econ. Entomol. 82: 788-792.
- Jones, V. P., D. G. Alston, J. F. Brunner,
D. W.
Davis
& M. D. Shelton. 1991. Phenology of the western cherry fruit fly
(Diptera:
Tephritidae) in Utah and Washington. Ann. Entomol. Soc. Am. 84: 488-492.
- Jorgenson, C. D., D. B. Allred & R. L.
Westcott.
1986. Apple maggot (Rhagoletis pomonella) adaptation for
cherries
in Utah. Great Basin Natur. 46: 173-174.
- Kadono, F., H. Fujishiro, M. Shina & A.
Fujiie.
1982. Seasonal population trends of the Japanese pear rust mite, Eriophyes
chibaensis Kadono (Acarina: Eriophyidae) on pear trees in Chiba.
Jpn.
J. Appl. Entomol. Zool. 26: 213-217.
- Kaloostian, G. H. 1970. Transitory hosts of
the
pear
psylla. J. Econ. Entomol. 63: 1039-1041.
- Katsoyannos, P. 1992. Olive Pests and their
Control
in the Near East. FAO Plant Production and Protection Paper 115. 178 p.
- Keifer, H. H. 1946. A review of North
American
economic
eriophyid mites. J. Econ. Entomol. 39: 63-570.
- Krysan, J. L. 1990a. Fenoxycarb and
diapause: A
possible
method of control for pear psylla (Homoptera: syllidae). J. Econ.
Entomol.
83: 293-299.
- Krysan, J. L. 1990b. Laboratory study of
mating
behavior
as related to diapause in overwintering Cacopsylla pyricola
(Homoptera:
Psyllidae). Environ. Entomol. 19: 551-557.
- Krysan, J. L. & B. S. Higbee. 1990.
Seasonality
of mating and ovarian development in overwintering Cacopsylla
pyricola
(Homoptera: Psyllidae). Environ. Entomol. 19: 544-550.
- Krysan, J. L. & D. R. Horton. 1991.
Seasonality
of catch of pear psylla Cacopsylla pyricola (Homoptera:
Psyllidae)
on yellow traps. Environ. Entomol. 20: 626-634.
- Larsen, K. J. & M. E. Whalon. 1988.
Dispersal of Paraphlepsis
irroratus (Say) (Homoptera: Cicadellidae) in peach and cherry
orchards.
Environ. Entomol. 17: 842-851.
- Lindner, R. E., E. C. Burts & N. R.
Benson.
1961.
The relation of pear psylla to pear decline. Proc. Wash. State Hortic.
Assoc. 57: 156.
- Lombard, P. B., P. H. Westigard & D.
Carpenter.
1966. Overhead sprinkler system for environmental control and pesticide
application in pear orchards. HortScience 1: 95-96.
- Madsen, H. F. 1961. Notes on Anthocoris
melanocerus
Reuter (Hemiptera: Anthocoridae) as a predator of the pear psylla in
British
Columbia. Can. Entomol. 93: 660-662.
- Madsen, H. F., R. L. Sisson & R. S.
Bethell.
1962.
The pear psylla in California. Calif. Exp. Stn. Circ. 510. 11 p.
- Marlatt, C. L. 1895. The pear-tree psylla.
USDA
Circ.
7. 8 p.
- McMullen, R. D. 1964. Biological control of
pear
psylla.
Proc. Wash. State Hortic. Assoc. 60: 79-82.
- McMullen, R. D. 1966. New records of
chalcidoid
parasites
and hyperparasites of Psylla pyricola Forster in British
Columbia.
Can. Entomol. 98: 236-239.
- McMullen, R. D. & C. Jong. 1967. The
influence of
three insecticides on predation of the pear psylla, Psylla pyricola.
Can.
Entomol. 99: 1292-1297.
- McMullen, R. D. & C. Jong. 1971.
Dithio-carbamate
fungicides for control of pear psylla. J. Econ. Entomol. 64: 1266-1270.
- McMullen, R. D. & C. Jong. 1972. Effect
of
temperature
and host vigor on fecundity of the pear psylla (Homoptera: Psyllidae).
Can. Entomol. 104: 1209-1212.
- McMullen, R. D. & C. Jong. 1976. Factors
affecting
induction and termination of diapause in pear psylla (Homoptera:
Psyllidae).
Can. Entomol. 108: 1001-1006.
- McNab, S. C. & P. H. Jerie. 1991. Leaf
scorch responses
of `Sensation' and `Bartlett' pear to twospotted spider mite (Acari:
Tetranychidae).
J. Econ. Entomol. 84: 1334-1338.
- Messina, F. J. & V. P. Jones. 1990.
Relationship
between fruit phenology and infestation by the apple maggot (Diptera:
Tephritidae)
in Utah. Ann. Entomol. Soc. Am. 83: 742-752.
- Miller, J. C., P. E. Hanson & R. V.
Dowell.
1987.
The potential of gypsy moth as a pest of fruit and nut crops. Calif.
Agric.
Vol?Nov.-Dec. 87: 10-12.
- Moffitt, H. R. & P. H. Westigard. 1984.
Suppression
of the codling moth (Lepidoptera: Tortricidae) population on pears in
southern
Oregon through mating disruption with sex pheromone. J. Econ. Entomol.
77: 1513-1519.
- Nichols, C. A., F. L. Blanc, A. A. Millecan
& G.
B. Barbe. 1965. A new explanation of the spread of pear psylla and pear
decline virus in California. Calif. Dep. Agric. Bull. 54: 133-144.
- Nickel, J. L., T. Shimizu & T. T. Y.
Wong.
1965.
Studies on natural control of pear psylla in California. J. Econ.
Entomol.
58: 970-976.
- Pellizzari, G. 1997. Olive. p. 217-229. In:
Y.
Ben-Dov
and C. J. Hodgson (eds). Soft Scale Insects: Their Biology,
Natural
Enemies and Control. World Crop Pests. Vol. 7B. Elsevier, Amsterdam.
442
p.
- Pfeiffer, D. G. & E. C. Burts. 1984.
Effect
of tree
fertilization on protein and free amino acid content and feeding rate
of
pear psylla (Homoptera: Psyllidae). Environ. Entomol. 13: 1487-1490.
- Pfeiffer, D. G. & E. C. Burts. 1983.
Effect
of tree
fertilization on numbers and development of pear psylla (Homoptera:
Psyllidae),
and on fruit damage. Environ. Entomol. 12: 895-901.
- Pfeiffer, D. G. & R. L. Horsburgh. 1995.
Pear -
Indirect pests. p. 45-49. In: Hogmire, H. W. (ed.).
Mid-Atlantic
Orchard Monitoring Guide. NRAES 75.
- Pree, D. J., D. E. Archibald, K. W. Kerr
&
K. J.
Cole. 1990. Occurrence of pyrethroid resistance in pear psylla
(Homoptera:
Psyllidae) populations from southern Ontario. J. Econ. Entomol. 83:
2159-2163.
- Quaintance, A. L. 1929. The peach borer: How
to
prevent
or lessen its ravages. USDA Farmers' Bull. 1246. 14 p.
- Retan, A. H., E. Burts & V. Carrithers.
1984. Pear
psylla detection and control. Wash. State Univ. Ext. Bull. 1230. 4 p.
- Santas, L. A. 1987. The predators' complex
of
pear-feeding
psyllids in unsprayed wild pear trees in Greece. Entomophaga 32:
291-297.
- Savinelli,C. E. & R. C. Tetrault. 1984.
Analysis
of pear psylla (Homoptera: Psyllidae) populations and associated damage
in a Pennsylvania pear orchard. Environ. Entomol. 13: 278-281.
- Singleton-Smith, J., J. F. Chang & B. J.
R.
Philogène.
1978. Morphological differences between nymphal instars and
descriptions
of the antennal sensory structures of the nymphs and adults of Psylla
pyricola Foerster (Homoptera: Psyllidae). Can. J. Zool. 56:
1576-1584.
- Slingerland, M. V. 1892. The pear-tree
psylla.
Cornell
Univ. Agric. Exp. Stn. Bull. 44: 163-186.
- Smith, E. H. 1965. The susceptibility of
life
history
stages of the pear psylla to oil treatment. J. Econ. Entomol. 58:
456-464.
- Solomon, M. G., J. E. Cranham, M. A.
Easterbrook
&
J. D. Fitzgerald. 1989. Control of the pear psyllid, Cacopsylla
pyricola,
in South East England by predators and pesticides. Crop Prot. 8:
197-205.
- Solomon, M. G & J. D. Fitzgerald. 1988.
Teflubenzuron
for control of pear sucker Cacopsylla pyricola. Ann. Appl.Biol.
112(Supp.): 16- 17.
- Solomon, M. G & J. D. Fitzgerald. 1990.
Fenoxycarb,
a selective insecticide for inclusion in integrated pest management
systems
for pear in the UK. J. Hortic. Sci. 65: 535-539.
- Sugar, D., T. L. Righetti & P. H.
Westigard.
1989.
Relationship between densities of pear psylla and twospotted spider
mite
and pear leaf nutrient levels. HortScience 24: 242-245.
- Tabashnik, B. E., B. A. Croft & J. A.
Rosenheim.
1990. Spatial scale of fenvalerate resistance in pear psylla
(Homoptera:
Psyllidae) and its relationship to treatment history. J. Econ. Entomol.
83: 1177-1183.
- Thanh-Xuan, N. 1972. Influence de la nature
des
plantes
hôtes sur la longévité et de la fécondité
de Psylla pyri L. (Insecte, Homoptera, Psyllidae). C. R. Acad.
Sci.,
Ser. D. 274(4): 546-548.
- Ullman, D. E. & D. L. McLean. 1988a.
Feeding
behavior
of the winter-form pear psylla, Psylla pyricola (Homoptera:
Psyllidae),
on reproductive and transitory host plants. Environ. Entomol. 17:
675-678.
- Ullman, D. E. & D. L. McLean. 1988b. The
probing
behavior of the summer-form pear psylla. Entomol. Exp. Appl. 47:
115-125.
- Unruh, T. R. & J. L. Krysan. 1994.
Reproductive
diapause and host plants affect insecticide tolerance of adult pear
psylla
(Homoptera: Psyllidae). J. Econ. Entomol. 87: 858-865.
- van de Baan, H. E. & B. A. Croft. 1991.
Resistance
to insecticides in winter-forms and summer forms of pear psylla, Psylla
pyricola. Pestic. Sci. 32: 225-233.
- van de Baan, H. E., B. A. Croft & E. C.
Burts. 1990.
Resistance to the pyrethroid fenvalerate in pear psylla, Psylla
pyricola
Foerster (Homoptera: Psyllidae), in the northwestern USA. Crop Prot. 9:
185-189.
- van de Baan, H. E., P. H. Westigard, E. C.
Burts
&
B. A. Croft. 1989. Seasonal susceptibility to insecticides in
insecticide-resistant
pear psylla, Psylla pyricola (Homoptera: Psyllidae). Crop Prot.
8: 122-126.
- Watson, T. K. & W. H. A. Wilde. 1963.
Laboratory
and field observations on two predators of the pear psylla in British
Columbia.
Can. Entomol. 95: 435-438.
- Webster, R. L. 1939. The pear psylla survey.
Proc. Wash.
State Hortic. Assoc. 35: 36-40.
- Westigard, P. H. 1973. Pest status of
insects
and mites
on pear in southern Oregon. J. Econ. Entomol. 66: 227-232.
- Westigard, P. H. 1974. Control of the pear
psylla with
insect growth regulators and preliminary effects on some non-target
species.
Environ. Entomol. 3: 256-258.
- Westigard, P. H. 1975. Population injury
levels
and
sampling of the pear rust mite on pears in southern Oregon. J. Econ.
Entomol.
68: 786-790.
- Westigard, P. H. 1979. Codling moth: Control
on
pears
with diflubenzuron and effects on non-target pest and beneficial
species.
J. Econ. Entomol. 72: 552-554.
- Westigard, P. H., R. B. Allen & L. J.
Gut.
1981.
Pear psylla: Relationship of early-season nymph densities to
honeydew-induced
fruit damage on two cultivars. J. Econ. Entomol. 74: 532-534/
- Westigard, P. H., L. G. Gentner & D. W.
Berry. 1968.
Present status of biological control of the pear psylla in southern
Oregon.
J. Econ. Entomol. 61: 740-743.
- Westigard, P. H., L. J. Gut & W. J.
Liss.
1986.
Selective control program for the pear pest complex in southern Oregon.
J. Econ. Entomol. 79: 250-257.
- Westigard, P. H., U. Kiigemagi & P. B.
Lombard.
1974. Reduction of pesticide deposits on pear following overtree
irrigation.
HortScience 9: 34-35.
- Westigard, P. H., P. B. Lombard, R. B. Allen
& J.
G. Strang. 1980. Pear psylla: Population suppression through host plant
modification using daminozide. Environ. Entomol. 9: 257-277.
- Westigard, P. H., P. B. Lombard & D. W.
Berry. 1979.
Integrated pest management of insects and mites attacking pears in
southern
Oregon. Ore. Agric. Exp. Stn. Bull. 634. 40 p.
- Westigard, P. H., P. B. Lombard & J. H.
Grim. 1966.
Preliminary investigations of the effect of feeding of various levels
of
two-spotted spider mite on its Anjou pear host. Proc. Am. Soc. Hortic.
Sci. 89: 117-122.
- Westigard, P. H. & H. F. Madsen. 1963.
Pear
psylla
in abandoned orchards. Calif. Agric. 17(1): 6-8.
- Westigard, P. H. & H. R. Moffitt. 1984.
Natural
control of the pear psylla (Homoptera: Psyllidae): Impact of mating
disruption
with the sex pheromone for control of the codling moth (Lepidoptera:
Tortricidae).
J. Econ. Entomol. 77: 1520-1523.
- Westigard, P. H., M. N. Westwood & P. B.
Lombard.
1970. Host preference and resistance of Pyrus species to the
pear
psylla, Psylla pyricola Foerster. J. Am. Soc. Hortic. Sci. 95:
34-36.
- Wiener, L. F. & D. M. Norris. 1983.
Evaluation of
sampling and control methods for lesser peachtree borer (Lepidoptera:
Sesiidae)
and American plum borer (Lepidoptera: Pyralidae) in sour cherry
orchards.
J. Econ. Entomol. 76: 1118-1120.
- Zwick, R. W. & P. H. Westigard. 1978.
Prebloom petroleum
oil applications for delaying pear psylla (Homoptera: Psyllidae)
oviposition.
Can. Entomol. 110: 225-236.
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