INSECTS IN THE GARDEN Rachel Suits Outreach Program Coordinator - - PowerPoint PPT Presentation

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INSECTS IN THE GARDEN Rachel Suits Outreach Program Coordinator - - PowerPoint PPT Presentation

Jan 08, 2023 245 likes •873 views

INSECTS IN THE GARDEN Rachel Suits Outreach Program Coordinator OSU Extension Service Objectives Understand basic insect morphology and physiology. Understand the different niches that insects occupy in an ecosystem. Be able to

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INSECTS IN THE GARDEN

Rachel Suits Outreach Program Coordinator OSU Extension Service

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Objectives

■ Understand basic insect morphology and physiology. ■ Understand the different niches that insects

  • ccupy in an ecosystem.

■ Be able to infer a niche based on mouthparts and other identifying characteristics. ■ Learn and teach identifying characteristics for insect orders.

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OVERVIEW

1.What is an insect? 2.Insect biology 3.Diversity & Classification

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Fun insect facts

■ About 80% of the Earth’s animals are insects ■ 1 million species described ■ Most insects are

  • beneficial. Only

about 1-3% of insects are pests

■ Coevolved to pollinate plants ■ An important food source for many other animals ■ Soil: help aerate the soil, improve its retention of rainwater, and enhance its tilth (physical condition).

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Why do Insects Exist?

■ Insects are involved in every aspect of life – Decomposition – Population control – Supporting food chains – Agriculture – Pollinators

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Important because…

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Most concentrated energy

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THE INSECT APOCALYPSE IS HERE

November 27, 2018

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Insect Vectored Illnesses

DENGUE FEVER ZIKA MALARIA CHAGAS WEST NILE LYME

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No backbone (invertebrates) Exoskeleton Jointed legs Segmented

Arthropods (Insects & their

relatives)

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ANIMALS ARTHROPODS

INSECTS ARACHNIDS MYRIAPODS

lady y beetles etles stink nk bugs spider ers mites millipe pedes es centipedes tipedes

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What are Arachnids?

■ Arthropod, Non-insect ■ 2 body regions ■ 8 legs ■ No wings ■ No antennae Spiders, mites, ticks & scorpions

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What are Myriapods?

■ Arthropod, Non- insect ■ Many body segments ■ 1 pair of antennae ■ Many legs – Millipedes = 2 pairs/segment – Centipedes = 1 pair/segment “recycler” predator

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Exoskeleton 3 body segments Compound Eyes 1 pair of antennae 3 pairs of legs Adults have wings

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Ex Exosk

  • skele

eleton

  • n

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Molting

■ Process to shed exoskeleton, usually to expand or become adults ■ Regulated by hormones – Some insecticides mimic these insect hormones to disrupt development

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Exoskeleton 3 body segments Compound Eyes 1 pair of antennae 3 pairs of legs Adults have wings

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Head Thorax Abdomen

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Exoskeleton 3 body segments Compound Eyes 1 pair of antennae 3 pairs of legs Adults have wings

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Head

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Exoskeleton 3 body segments Compound Eyes 1 pair of antennae 3 pairs of legs Adults have wings

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Thorax

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Sc Scale ales: s: On On the the wi wings ngs of

  • f

Bu Butt tter erfl flies ies an and d Moth ths

http:/ p://ww /www.vqr qronl nline ne.org/ g/vqr qr-por portf tfolio/scal io/scales es-wings wings-but utter erfl flies es-and and-mo moths ths

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Types of Legs

Leg Quiz!

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Abdomen

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Insects breathe through spiracles

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Mo Mouthpa uthparts ts

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Mandibles

  • chewing

Palpus

  • sponging

Stylet

  • sucking
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Feeding Categories

de defoli liation ation min inin ing lea eafroller

  • ller

sucking ing ga gall maker er pa paras asit itoid

  • id
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Feeding Categories

de defoli liation ation min inin ing lea eafroller

  • ller

sucking ing ga gall maker er pa paras asit itoid

  • id
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Feeding Categories

de defoli liation ation min inin ing lea eafroller

  • ller

sucking ing ga gall maker er pa paras asit itoid

  • id
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Feeding Categories

de defoli liation ation min inin ing lea eafroller

  • ller

sucking ing ga gall maker er pa paras asit itoid

  • id
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Feeding Categories

de defoli liation ation min inin ing lea eafroller

  • ller

sucking ing ga gall maker er pa paras asit itoid

  • id
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Feeding Categories

de defoli liation ation min inin ing lea eafroller

  • ller

sucking ing ga gall maker er pa paras asit itoid

  • id
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Making mummies

Photo by R Dufour

Videos: Dr. Steven Wratten

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Insect Development

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Metam etamor

  • rphosis

phosis

Comple plete

Larva Pupa Adult

Simple ple

Nymph Adult

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instar 1st 2nd 3rd 4th 5th

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Hemipt iptera era, , 7.80% Coleopt eoptera ra, , 41. 1.20% 20% Diptera era, , 12.40% Hymen enopt

  • ptera

ra , , 14.90% 0% Lepidopt idoptera era, , 15.90% Other er, , 7.70%

DIVERSIT SITY Y OF OF SPECIES

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CHEWING yes defoliation beetle caterpillar grasshopper leafroller caterpillar mining fly caterpillar no SUCKING yes True bug Aphid/LH mite no GALL yes mite wasp no Disease?

Plant Damage Decision Tree

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Entomology resources

■ PNW handbook: https://pnwhandbooks.org/insect ■ Bugguide.net ■ Xerces Society: www.xerces.org ■ OSU Online Insect Collection: http://oregondigital.org/sets/ken-gray

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