Category: Entertainment

Presentation Description

No description available.


By: sidney (138 month(s) ago)

I am a mastert gardner who is putting together a presentation on garden insects. I would like to get a copy oif your powerpoint presentation. Contact me by email at vanloh@sbcglobal.net.

Presentation Transcript

Insects & Relatives: 

Insects & Relatives 100,000 species in N America 1,000 in a typical backyard Mostly beneficial or harmless Pollination Food for birds and fish Produce honey, wax, shellac, silk Less than 3% are pests Destroy food crops, ornamentals Attack humans and pets Transmit disease

Link to printable PDFs: 

Link to printable PDFs http://entm29.entm.purdue.edu/acorn/workshopfiles.asp

Biological Control Introduction: 

What is Biological Control? Know the Natural Enemies Predators Parasites Pathogens Biological Control Introduction

What is biological control?: 

The use of living organisms to control pest insects, weeds, or diseases. Typically involves some human activity. What is biological control?

What are Natural Enemies?: 

Natural enemies are living organisms that: Kill pests Decrease pest reproductive potential Compete with pest organisms for use of your plants. What are Natural Enemies?

Biological control: 

How is it Implemented? Use what you have (Conservation). Add what you need (Augmentation). By Whom? Predators Parasites Pathogens Biological control


Adult and immature stages are often generalists rather than specialists. Kill and consume many prey. Generally larger and faster than prey. 200,000 species! Males, females, immatures, and adults may be predatory. Remove the evidence. Predators

What makes me a predator?: 

What makes me a predator?

What makes me a predator?: 

What makes me a predator?

Where is the predator?: 

Where is the predator?

Which characteristics make me a predator?: 

Which characteristics make me a predator?

Lacewing Larvae: 

Lacewing Larvae Large grasping jaws D. Shetlar

Where is the beneficial insect?: 

Where is the beneficial insect?

Which is the predator?: 

Which is the predator?

Who am I?: 

Who am I?

How do you know I am predator?: 

How do you know I am predator?

Flower fly: 

Flower fly

Predatory Midge: 

D. Shetlar Predatory Midge

Good Mite or Bad Mite?: 

Predatory mite Spider mite Good Mite or Bad Mite?

A stinger or ovipositor??? : 

A stinger or ovipositor???


Specialized in choice of host. Develop from eggs laid in or on a host (the original “Alien”). Certain kinds of wasps and flies. Could be up to 1 million species! Smaller than host (stealth pays). Only the female searches for host. Leave a trail. Parasites



Hornworm parasitoids: 

Hornworm parasitoids Eggs or Pupae??? Eggs or Pupae? Eggs or Pupae?

Dissected parasitoid: 

Parasitized insect was cut open to show the parasites. Dissected parasitoid

Typhiid wasp ectoparasitoid: 

D. Shetlar Typhiid wasp ectoparasitoid

Aphid Parasite Lifecycle: 

Egg Larva Adult Pupa Aphid Parasite Lifecycle

Aphid parasitoids: 

D. Shetlar Aphid parasitoids

Holes where parasitoid escaped: 

Holes where parasitoid escaped

Encarsia citrina: 

Encarsia citrina A B C Larva Pupa Emergence Hole Adult D Photos by E. Rebek


Kill, reduce reproduction, slow growth, shorten life of pest. May take several days to provide control. Usually very specific. Leave a trail. Pathogens

Insect Pathogens: 

Fungi, example: Beauvaria bassiana Bacteria, example: Bt. Nematodes Viruses and Protozoans Insect Pathogens

Insect Mummy: 

Insect Mummy Insect Mummy covered with Fungal Spores

Metarhizium fungus: 

D. Shetlar Metarhizium fungus

Virus : 

Infected Larva Viral fluid Virus

Gypsy Moth NPV: 

Gypsy Moth NPV


http://www.oardc.ohio-state.edu/nematodes/ Infective Juveniles Adults Infected Host Nematodes

Nematode Life Cycle: 

Nematode Life Cycle

Take home points: 

Predators: bigger, fewer, faster, big mouthparts. Parasites: small size, not easily seen by gardeners. - many flies and wasps. Pathogens: cause disease in insect not harmful to other organisms. Take home points

Where can you learn to identify more natural enemies?: 

http://entm29.entm.purdue.edu/acorn/acornsearch.aspx Where can you learn to identify more natural enemies?

authorStream Live Help