Green Modern Nature Presentation
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Title: Group 3 Anthropods and Vertebrate Pests and Natural Enemies
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Section: Definition of Entomology
Discusses the differentiation between insects and mites.
Highlights distinguishing features of insects that contribute to their success.
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Definition of Entomology:
Scientific study of insects and related anthropods.
Originates from French "Entomologie"; derived from Greek "Entomon" (insect) and "Logia" (study).
Latin term "insectum" relates to slitting or cutting.
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Specialized Fields of Entomology:
Insect Morphology: Study of insect form and structure.
Insect Physiology: Studies physiological and chemical changes within insects.
Insect Ecology: Examines insects' interactions with the environment.
Insect Taxonomy: Classifies insects and studies their relationships.
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Additional Fields:
Insecticide Toxicology: Impact of chemicals on insects and ecosystems.
Forest Entomology: Focuses on insects in forest ecosystems.
Medical/Veterinary Entomology: Investigates insect vectors of diseases.
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Other Specialized Fields:
Biological Control: Methods to manage pests using natural control agents.
Economic Entomology: Studies beneficial or harmful insects in economic contexts.
Industrial Entomology: Explores survival and reproduction patterns of insects useful to humans.
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Distinguishing Features of Insects (Phylum Arthropoda):
Characteristics:
Bilateral symmetry
Exoskeleton with a hard shell
Jointed body and paired appendages
Sclerotized exoskeleton of chitin.
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Subphyla Under Arthropoda:
Chelicerata: Body divided into cephalothorax and abdomen; lacks antennae.
Mandibulata: Distinct head with mandibles; variations in body structure.
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Classes of Arthropoda:
Class Arachnida: Includes spiders, ticks; lacks antennae and limbs for movement.
Class Crustacea: Diverse body regions and biramous appendages.
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Class Chilopoda (Centipede):
Head and trunk divisions; each segment bears one pair of legs.
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Class Diplopoda (Millipede):
Body segments merged; two pairs of legs per segment.
Body divided into thorax and abdomen.
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Class Insecta:
Three body divisions: head, thorax, abdomen.
Presence of 3 pairs of legs, varying wings and antennae.
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Insect Head Structure:
Head similar to a box with fused segments; contains brain, eyes, antennae, mouthparts.
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Types of Insect Head Orientation:
Hypognathous: Mouthparts hang vertically.
Prognathous: Mouthparts extend forward.
Opisthognathous: Mouthparts extend downward under the head.
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Insect Eyes:
Compound Eyes: Made of facets (ommatidia).
Simple Eyes (Ocelli): Typically positioned among compound eyes.
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Insect Antennae:
Functions in sensation, odor detection, and in some cases, sound.
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Types of Antennae Variations:
Various forms based on structure and function: setaceous, filiform, serrate, etc.
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Insect Mouthparts:
Various types depending on diet: chewing, lapping, sponging, piercing-sucking, etc.
Mandibulate mouthparts: Basic type used for chewing.
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Thorax and Legs:
Thorax: Middle region; supports locomotory appendages.
Leg Modifications: Features for adaptation (cursorial, fossorial, natatorial, raptorial, etc.).
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Insect Wings:
Two pairs utilized for flight, various modifications: elytra, membranous, fringed, halteres, etc.
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Abdomen:
Houses visceral organs; can have 8-11 segments with spiracles for respiration.
Reproductive structures vary by sex (male/female).
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Conclusion:
Acknowledgment of the material's importance.