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                                                     BIOLOGICAL PEST CONTROL DATABASE

                                                                                             (e.legner@ucr.edu)

 

 

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Background & Overview     Ecological Considerations     Behavior, Ontogeny & Reproduction in Natural Enemies

 

Techniques Employed in Implementation     Special Research Groups & Integrated Control

 

Populations     Evaluation of Natural Enemies     Detailed Cases of BioControl     References

 

 

BACKGROUND AND OVERVIEW

 

Section 1 <bc-1.htm>

Introduction & Scope of Biological Pest Control

  Economics.

  Important Terms

  References

 

Section 2 <bc-2.htm>

History of Biological Control

  Insect Predation

  Insect Parasitoidism

  Biological Control in the 18th Century

  Biological Control in the Early 19th Century

  Biological Control in the Late 19th Century

  Historical Summary

  References

 

Section 3 <bc-3.htm>

Biological Characteristics of Arthropophagous Arthropods.

  Hyperparasitism, Autoparasitism, Multiple Parasitism, etc.

  The Imago or Adult Parasitoid.

  Mating.

  Ovigenesis.

  Host-feeding

  Ovisorption

  References

 

Section 4 <bc-4.htm>

Organizations Active in Biological Control

  International Institute of Biological Control

  L'Organisation Internationale de Lutte Biologique.

  United States Department of Agriculture

  Individual Countries

  Suppliers of Biological Control Organisms

  References

 

Section 5 <bc-5.htm>

Economic Gains from Biological Control

  Cost Effectiveness

  Biological Control From Naturally Occurring Organisms

  Estimation of the Benefits and Costs of Classical Biological Control

 

Analysis of Successes in Biological Control

  Island Theory

  Multiple Versus "The Best" Species

  Clausen's 3-Host Generation/ 3-Year Rule

  Single Larval Parasitoid Importations.

  Single Pupal Parasitoid

  Generalizations.

  Pest Groups

  Natural Enemy Groups

  References

 

Section 6 <bc-6.htm>

Trends & Future Possibilities

  Complexities

  Stimulation to Theories in Population Dynamics and Ecology

  Future of Integrated Control

  Future of Insect Pathology

  Future of Biological Weed Control

  Future of Biological Control of Medically Important Pests.

  References

 

ECOLOGICAL  CONSIDERATIONS

 

Section 7 <bc-7.htm>

The Role of Parasitoids and Predators in Natural Control

  Examples of Stability

  Measuring the Force of Natural Control

  Nature of Parasitism

  Occurrence of Parasitoidism in Insects

  Taxonomic Groups Important to Biological Control

  General Ecology of Parasitoids

  Reproductive Strategies.

  Percent Parasitization

  Population Regulation

  Conclusions

  Exercises

  References

 

Section 8 <bc-8.htm>

Climate as a Factor in the Natural Control of Organisms

  Introduction and Discussion

  Examples (cherry fruit fly, face fly, red scale, walnut aphid,

      spotted alfalfa aphid, Japanese beetle, alfalfa weevil, black

       scale, Klamath weed, Mexican bean beetle, American grizzly

       bear, aquatic weeds, house fly, eye gnats)

  Conclusions...

  Exercises...

  References

 

Section 9 <bc-9.htm>

Genetic Considerations in Biological Control (Acquisition of Natural

     Enemies, Breeding, Mass Releases)

  The Natural Population at its Origin

  Natural Enemy Introductions

  Improving Fitness of Natural Enemies

  Improving Tolerance to Pesticides

  Genetic Engineering

  Prolonged Culture

  Exercises

  References

 

Section 10  <bc-10.htm>

 

Extranuclear Events Influencing Behavior and Fecundity in Parasitoids

     and Other Animals  

  Direct Effects of the Cytoplasmic Genome

  Chemical Substances Affecting Behavior

  Muscidifurax Parasitoid Complex

  Exercises

  References

 

Section 11 <bc-11.htm>

Biological Control Precepts

  Homopterous Insects as Ideal Candidates

  Examples Demonstrating Precepts

    Cottony-cushion scale

    Florida red scale

    California red scale

    Olive scale

    Rhodesgrass scale

    Walnut aphid

    Orb-weaving spiders

  The Importance of Single Species in Determining the Average

        Abundance of Plants and Animals

  Table 11.1 (Examples showing host densities dependent on one

        or two species)

  Conclusions

  Exercises

  References

 

Section 12 <bc-12.htm>

 

Competitive Displacement, Exclusion and Coexistence.

  Mechanisms of Competitive Displacement

  Examples

  The Coexistence Principle

  Competitive Displacement of Non-homologues

  Competitive Displacement and Biological Control

  Exercises

  References

 

Section 13 <bc-13.htm>

Habitat, Host-finding and Host Acceptance

  Habitat Effects on Natural Enemies

  Characteristics of the Habitat that Attract or Repel Natural

       Enemies

  Host Food Affects Suitability for Parasitization

  Other Influences of Habitat

  Habitat Diversity vs. Similarity Affects Population Stability

  Host Finding

  Host Acceptance

  Host Suitability

  Host Regulation

  Manner and Place of Oviposition

  Exercises

  References

 

Section 14 <bc-14.htm>

Problems and Calculations

 

 

BEHAVIOR, ONTOGENY AND REPRODUCTION

IN NATURAL ENEMIES

 

Section 15 <bc-15.htm>

Parthenogenesis

  Cytology

  Arrhenotoky vs. Thelytoky

  Exercises

  References

 

Section 16 <bc-16.htm>

Arrhenotokous / Thelytokous Reproduction

  Sex Determination

    Cytology

    Genetics

    Early Hypotheses

    Modern Hypotheses

  Some Generalities in Arrhenotokous Reproduction

    Biparental Males

    Androgenesis

    Polyploidy

    The R locus

    Incompatibility Factors

    Sex Intergrades

  Functional Aspects of Arrhenotokous Reproduction

  Extranuclear Inheritance and Polygenes in Arrhenotoky

  Recombinant Hymenopteran Males

  Estimations of the Number of Active Polygenic Loci

  Coefficient of Heritability

  Dominance

  Some Generalities in Thelytokous Reproduction

  Exercises

  References

 

Section 17 <bc-17.htm>

Embryology / Ontogeny / Anatomy

  Early Stages of Ontogeny

    Organization of the Ripe Egg

    Development of the Egg

    Cleavage.

    Gastrulation

    Segmentation

  Prenatal Development in Hymenoptera Specifically

    Egg Size & Shape

    Common Egg Shapes in Parasitoids

  Polyembryony in Hymenoptera

  Post Natal Development

    Larval Feeding

    Larval Respiration

    Larval Anatomy

    Hypermetamorphosis

    Prepupa

    Pupa

    Rate of Development

    Exit from the Host

    Male Reproductive System

  Exercises

References

 

Section 18 <bc-18.htm>

Oogenesis-Ovisorption (oosorption, egg resorption)

  General Characteristics

  Physiology of Ovigenesis-ovisorption

  Vitellogenesis (yolk formation)

  Classification of Hymenoptera by the Female's Reproductive System

  Variability in Ovisorption Process among Hymenoptera

    Ovisorption Rate

    Effect of Ovisorption on Longevity

    Work on Nasonia vitripennis

  Exercises.

  References

 

Section 19 <bc-19.htm>

Facultative Sex Regulation

  Spermatheca and Spermathecal Gland

    Types of Spermathecae in Hymenoptera

  Sex Regulation Considerations

  Exercises

  References

 

Section 20 <bc-20.htm>

Behavioral, Ecological and Physiological Factors affecting the Sex Ratio

  Behavioral and Ecological Phenomena

    Topographical Environment

    Larval Competition

    Humidity & Light Intensity

    Host Size

    Host Availability

    Host / Parasitoid Density

    Oviposition Restraint

    Mating

    Delayed & Interrupted Oviposition

    Heteronomous Parasitoids

    Theoretical Considertions

  Physiological Phenomena

    High Temperature

    Low Temperature

    Nutritional Influences

    Age

    Photoperiod

    Selective Breeding

    Microorganisms

    Paternal Sex Ratio

  Exercises

  References

 

Section 21 <bc-21.htm>

Determination of Progeny Number

  Behavioral and Ecological Phenomena

    Courtship & Copulation

    Host Location

    Host Attack & Paralysis

    Host Preferences

    Host Transport

    Progeny Defense

    Oviposition Restraint

    Host / Parasitoid Density

    Temperature

    Host Size

    Humidity

    Adult Parasitoid Food

    Larval Competition

    Ant Activity

    Learning

  Physiological phenomena

    Nutrition (host-feeding)

    Temperature

    Humidity

    Selective Breeding

    Mating

    Ovisorption & Ovulation Effects

    Glands

    Chemical Communication

  Genetic and Extrachromosomal Phenomena       

  Exercises

  References

 

Section 22 <bc-22.htm>

Host Defense Reactions

  Encapsulation (phagocytosis)

  Melanization

  Humoral Reactions

Incumbered Host Defenses

  Exercises

  References

 

Section 23 <bc-23.htm>

Diapause in Developmental Stages and the Imago

  Photoperiod

    Direct & Indirect Action

    Perception

    Photoperiodicity in Geographic Races

    Seasonal Forms

    Sensitive Stages

    Induction

  Characteristics of Diapause Termination

  Diapause in Parasitic Insects

    Endocrine Processes Involved

    Theories & Experiments

  Exercises

  References

 

Section 24 <bc-24.htm>

Caste Bias

  Characteristics

  Generalizations on Caste Determination