introduction to ipm - ucanr.edu · importance of pest identification have to identify the problem...
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Introduction to IPM
Types of pests Importance of pest
identification Information resources
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What is the idea behind IPM? Ecologically-based
approach Prevents problems Based on knowledge of
pest, biology, and habitat
Identify pests
Monitor for problems
• Don’t spray just because you see a pest
• Uses least-toxic methods to protect people and environment
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IPM tools and techniques Combine practices for long-term management
Prevention Cultural
practices
Pesticides, if needed • Monitor to detect
and assess problems
• Use least-toxic materials
Physical/ mechanical
Exclusion
Lady beetle larva
Biological control
Competitive plants
Mulch
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Why choose IPM? Provides long-term
solutions Manages potential
problems before they get out of hand
Eliminates unnecessary pesticide use
Good for health and the environment
Gives you choices that rarely require pesticides
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Types of Pests
Insects/mites
Pathogens
Molluscs Nematodes
Weeds
Vertebrates
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Insects and Mites
Head, thorax, and abdomen 3 pairs of legs
Mouthparts chewing (beetles, caterpillars) piercing-sucking (aphids, bugs) sponging (flies) siphoning (moths) rasping-sucking (thrips) cutting-sponging (biting flies) chewing-lapping (wasps)
Insects Two body parts 4 pairs of legs
piercing-sucking
Mites
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Weed Classifications
Winter Summer
Annuals Perennials
MonocotsGrasses and Sedges
Winter Summer
Annuals Perennials
Dicots
Plant
Spotted spurge Mallow Crabgrass Annual bluegrass
Bermudagrass
Field bindweed
Broadleaf
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Pathogens and Nematodes
Adult root lesion nematodes inside root
Female root-knot nematode next to root gall
Almond Alternaria Leaf Spot
Verticillium Wilt
Virus Bacteria Water molds
Old model
time
New model
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Vertebrates
Gophers
Birds
Rabbits
Voles
Ground squirrels
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Snails and Slugs
Adult brown garden snail Gray garden slug
Estivate in hot weather
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Importance of Pest Identification Have to identify the
problem before it can be solved.
Requires correlating pests to damage. ◦ Damage from insects,
diseases, weeds, etc., vs. ◦ Damage from equipment, nutrition,
water mgt., etc.
Big-eyed bug— beneficial insect
False chinch bug— sporadic, minor pest
Lygus bug—major pest
Herbicide damage vs. grub damage Mower damage
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Diagnosing Problems Just because you see a pest
doesn’t mean it caused the damage.
Not all damage needs to be treated.
Pests may no longer be present.
Pest may be difficult to find Irrigation problems and
nutritional deficiencies
Stink bug damage
Belowground damage from root-knot nematode
Katydid damage
Damping off from fungi, primarily weather-related
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Identify your pest Identify your pest Understand its life
cycle
Crabgrass
Dallisgrass
Wind damage
Syrphid fly larva
Beneficial insects
Lady beetle larva
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Resources to help you identify pests
www.ipm.ucanr.edu
Weed photo gallery
UC IPM Publications
Science-based
Pest management guidelines (PMGs)
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Be on the lookout
Monitor regularly
Check for weeds Inspect
plants
Powdery growth
Monitoring
Hand lens
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Reduce problems with cultural controls
Select well-adapted and pest-resistant plant species
Keep crop competitive with proper irrigation, fertilization
• Provide adequate water
The San Andreas strawberry cultivar (left) is resistant to Fusarium wilt, while the Albion cultivar (right) is susceptible
Drip irrigation reduces weeds
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Manage pests with physical or mechanical methods
Hand pull
Solarize the soil
Weed trimmer Prune infested foliage
Mulch
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Remove pests with physical or mechanical methods
Reduce mites by washing off dusty leaves
Traps
Snails
Yellowjackets Mice
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Biological Control Arthropods
Controlling insects and mites with:
◦ Pathogens ◦ Predators
◦ Parasites
Parasitic wasp
Predacious beetles
Beet armyworm larvae killed by Bt (bacteria)
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Identification
Good or Bad? Many beneficial insects
such as the syrphid fly larvae and the cecidomyid midge look like plant pests, but are actually effective predators of aphids.
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Pesticide
Any chemical (natural or synthetic) that mitigates (kills, controls, repels) a pest (animal or plant, etc.).
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If you use pesticides Choose the least-toxic
effective material
Use in combination with other methods
Follow label directions carefully
Consult UC IPM Pest Notes or PMGs www.ipm.ucanr.edu
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Herbicide
A chemical substance used to kill undesirable plants. Will kill any plant (not just weeds). Target broad range of or specific weeds. Preemergence and postemergence. Contact and systemic.
Treated with preemergence herbicide Untreated
Postemergence contact herbicide
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Insecticide
A chemical substance used to kill undesirable insects.
Contact—taken in directly through the surface of the pest. Stomach—ingested by the pest. Systemic—translocated through the plant. Fumigant—uptake by the pest through its breathing apparatus.
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Fungicide
A chemical substance used to kill undesirable fungi.
Powdery mildew on grape
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Impacts on Beneficial Organisms
Increase in secondary pests
Resurgence of target pest
0
10
20
30
40
50
60
70
80
Mar-04 Apr-04 May-04 Jun-04 Jul-04
Primary pestSecondary pestBeneficials
Broad-spectrum pesticide applied
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IPM for aphids
High number of aphids? No natural enemies? Know facts about biology
1. Identify the pest
2. Determine if this pest is a problem you can’t tolerate
Curled leaves
Honeydew and sooty mold
Many different aphid species
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IPM for aphids
New lush plant growth Destruction of natural
enemies by pesticides
3. Identify the conditions that cause aphids to thrive
How can you change these conditions?
Lacewing larva
Parasites
Syrphid larva
• Protection by ants • Avoid overfertilizing
plants • Avoid pesticides that kill
natural enemies • Keep ants off plants
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IPM for aphids
Prune out infested leaves and stems
Examine plants for natural enemies
4. Consider other methods
• Integrate methods with a pesticide. Choose least-toxic materials such as oils and soaps.
Lady beetle
Aphid mummies
Baiting for ants
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IPM for weeds
Know which weeds are invading
Use tools on the UC IPM web site
• Early emerging • Perennial weeds
1. Identify the pest
2. Determine if the weed is a problem
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IPM for weeds
Sources of weed seeds or propagules
Unplanted areas Letting weeds go to
seed
3. Identify the conditions that cause weeds to establish and grow
Mulches
• Manage weedy areas around growing area
• Don’t bring in seeds or propagules
• Plant dense plantings • Select competitive plants • Transplant instead of direct
seed • Install low-output irrigation
systems • Water, fertilize, prune properly • Use mulch
How can you change these conditions?
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IPM for weeds
Hand pull, shallow cultivation, hoeing
4. Consider other methods
• Remove weeds when small and before they set seed
• Solarize new planting beds
• Use herbicides
Garden hoe
Pull weeds by hand
Use water/wait/cultivate method to deplete seed bank
https://www.bhu.org.nz/
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ipm.ucanr.edu