Forum

Spatiotemporal Model for Studying Insect Dynamics in Large-Scale Cropping Systems.
C. C. Brewster and J. C. Allen 473

Pest Management and Sampling

Seasonal Abundance of Diamondback Moth (Lepidoptera: Yponomeutidae) on Crambe abyssinica.
Peter Kmec and Michael J. Weiss 483

Ovipositional Responses of Two Species of Spider Mites (Acari: Tetranychidae) to Sublethal Concentrations of Permethrin and Methyl Parathion on Corn.
Ramesh Ayyappath, John F. Witkowski, and Leon G. Higley 489

Community and Ecosystem Ecology

Early-Season Activity and Habitat Characteristics of Terricolous Spider Families (Araneae) in an Appalachian Oak-Mixed Hardwood Forest.
Rose-Marie Muzika and Mark J. Twery 497

Patterns of Spider (Araneae) Abundance During an Outbreak of Western Spruce Budworm (Lepidoptera: Tortricidae). R. R. Mason, D. T. Jennings, H. G. Paul, and B. E. Wickman 507

Habitats and Management Associated with Common Ground Beetles (Coleoptera: Carabidae) in a Michigan Agricultural Landscape.
M. Sean Clark, Stuart H. Gage, and John R. Spence 519

Rangeland Grasshoppers (Orthoptera: Acrididae) Associated with Mesquite and Juniper Habitats in the Texas Rolling Plains.
M. N. Parajulee, J. E. Slosser, R. Montandon, S. L. Dowhower, and W. E. Pinchak 528

New Correlations Between Aphid Stylet Paths and Nonpersistent Virus Transmission.
J. L. Collar, C. Avilla, and A. Fereres 537

Population Ecology

Variability in the Development of Cereal Aphid Parasitoids and Hyperparasitoids in Oceanic Regions as a Response to Climate and Abundance of Hosts.
Liliane Krespi, Charles-Antoine Dedryver, Veronique Creach, Jean-Michel Rabasse, Anne Le Ralec, and Jean-Pierre Nenon 545

Intraspecific Variation in Pear Psylla (Psyllidae: Homoptera) Nymphal Survival and Development on Resistant and Susceptible Pear.
Gary J. Puterka 552

Relative Prey Weight Influences Handling Time and Biomass Extraction in Sinea confusa and Zelus renardii (Heteroptera: Reduviidae).
Allen Carson Cohen and Robert Tang 559

Effects of Temperature and Sugar Maple Pollen on Oviposition and Longevity of Pear Thrips (Thysanoptera: Thripidae).
Tracy C. Leskey, David A. Teulon, and E. Alan Cameron 566

Fluctuation of Protandry in Eclosion of Anthocharis scolymus (Lepidoptera: Pieridae): Can Males Eclose Optimally Under Evolutionary Equilibrium?
Kouji Sawada, Shintaro Nomakuchi, Toshiya Masumoto, Nobuhiko Suzuki, Yoshifumi Shiotsu, Hideaki Koyanagi, Naoyuki Sugiura, and Natsuki Okuda 572

Seasonal Variation in Percentage of Striped Cucumber Beetles (Coleoptera: Chrysomelidae) That Vector Erwinia tracheiphila.
Gerald E. Brust 580

Once-Mated Beet Armyworm (Lepidoptera: Noctuidae): Effects of Age at Mating on Fecundity, Fertility, and Longevity.
C. E. Rogers and O. G. Marti, Jr. 585

Aphid--Barley Interactions Mediated by Water Stress and Barley Resistance to Russian Wheat Aphid (Homoptera: Aphididae).
C. J. Oswald II and M. J. Brewer 591

Simulating the Dynamics of Bemisia argentifolii (Homoptera: Aleyrodidae) in an Organic Cropping System with a Spatiotemporal Model.
C. C. Brewster, J. C. Allen, D. J. Schuster, and P. A. Stansly 603

Extrafloral Nectar, Honeydew, and Sucrose Effects on Searching Behavior and Efficiency of Microplitis croceipes (Hymenoptera: Braconidae) in Cotton.
J. Oscar Stapel, Anne Marie Cortesero, Consuelo M. De Moraes, James H. Tumlinson, and W. Joe Lewis 617

Physiological and Chemical Ecology

Host-Finding and Upwind Anemotaxis by Delia antiqua (Diptera: Anthomyiidae) in Relation to Age, Ovarian Development, and Mating Status.
R. S. McDonald and J. H. Borden 624

Suggestion of an Environmental Influence on Intercolony Agonism of Formosan Subterranean Termites (Isoptera: Rhinotermitidae).
Thomas G. Shelton and J. Kenneth Grace 632

Variability in Grain Aphid (Homoptera: Aphididae) Performance and Aphid-Induced Phytochemical Responses in Wheat.
Ernesto Gianoli, Claudia M. Caillaud, Bernard Chaubet, Jean Paul Di Pietro, and Hermann M. Niemeyer 638

Methyl Jasmonate Exposure Induces Insect Resistance in Cabbage and Tobacco.
S. A. Avdiushko, G. C. Brown, D. L. Dahlman, and D. F. Hildebrand 642

Temperature-Dependent Development Rate of Myiopharus doryphorae (Diptera: Tachinidae) within Its Host, the Colorado Potato Beetle (Coleoptera: Chrysomelidae).
Rolando Lopez, David N. Ferro, and Joseph S. Elkinton 655

Impact of Subzero Temperatures on Survival, Longevity, and Natality of Adult Russian Wheat Aphid (Homoptera: Aphididae).
Richard A. Butts and G. Bruce Schaalje 661

Dietary Phenolics Affects Performance of the Gypsy Moth (Lepidoptera: Lymantriidae) and Its Parasitoid Cotesia melanoscela (Hymenoptera: Braconidae).
Sherry Roth, Christine Knorr, and Richard L. Lindroth 668

Long- and Short-Term Effect of Cucurbitacin Consumption on Acalymma vittatum (Coleoptera: Chrysomelidae) Fitness.
Douglas W. Tallamy and Piotr M. Gorski 672

Cucurbitacins as Feeding and Oviposition Deterrents to Insects.
Douglas W. Tallamy, Jason Stull, Nathan P. Ehresman, Piotr M. Gorski, and Charles E. Mason 678

Biological Control

Assays with Commercially Produced Trichogramma (Hymenoptera: Trichogrammatidae) To Determine Suitability for Obliquebanded Leafroller (Lepidoptera: Tortricidae) Control.
D. S. Lawson, J. P. Nyrop, and W. H. Reissig 684

Laboratory Nontarget Host Range of the Introduced Parasitoids Microctonus aethiopoides and M. hyperodae (Hymenoptera: Braconidae) Compared with Field Parasitism in New Zealand.
B.I.P. Barratt, A. A. Evans, C. M. Ferguson, G. M. Barker, M. R. McNeill, and C. B. Phillips 694

Before and After Evaluation of Biological Control of the Larch Casebearer (Lepidoptera: Coleophoridae) in the Blue Mountains of Oregon and Washington, 1972--1995.
Roger B. Ryan 703

Oviposition Behavior and Development of Pseudacteon Flies (Diptera: Phoridae), Parasitoids of Solenopsis Fire Ants (Hymenoptera: Formicidae).
Lloyd W. Morrison, Christiane G. Dall'Aglio-Holvorcem, and Lawrence E. Gilbert 716

Book Reviews

Ecologically Based Pest Management: New Solutions for a New Century.
Reviewed by Ross H. Miller 725

The Neem Tree: Source of Unique Natural Products for Integrated Pest Management, Medicine, Industry and Other Purposes. H. Schmutterer [ed.].
Reviewed by Karl Maramoroch 726