Control of thrips without pesticides: dream or reality? · Thrips / 2 tape Type of Sticky Tape a b...

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Control of thrips without pesticides: dream or reality? Sarah Jandricic, Floriculture Extension Specialist, OMAF and Graeme Murphy, Grenhouse IPM Specilaist, BioLogical Control Solutions

Transcript of Control of thrips without pesticides: dream or reality? · Thrips / 2 tape Type of Sticky Tape a b...

Page 1: Control of thrips without pesticides: dream or reality? · Thrips / 2 tape Type of Sticky Tape a b ab b b b –E.g. Pot Mum Production 1 COMPARTMENT= 1500 Feet of Tape June 1-Aug

Control of thrips without pesticides: dream or reality?

Sarah Jandricic, Floriculture Extension Specialist, OMAF and

Graeme Murphy, Grenhouse IPM Specilaist, BioLogical Control Solutions

Page 2: Control of thrips without pesticides: dream or reality? · Thrips / 2 tape Type of Sticky Tape a b ab b b b –E.g. Pot Mum Production 1 COMPARTMENT= 1500 Feet of Tape June 1-Aug

DAMAGE

~ $15 M

per year in

Georgia

Page 3: Control of thrips without pesticides: dream or reality? · Thrips / 2 tape Type of Sticky Tape a b ab b b b –E.g. Pot Mum Production 1 COMPARTMENT= 1500 Feet of Tape June 1-Aug

PLANT VIRUSES

Impatiens necrotic spot – severe crop losses

Page 4: Control of thrips without pesticides: dream or reality? · Thrips / 2 tape Type of Sticky Tape a b ab b b b –E.g. Pot Mum Production 1 COMPARTMENT= 1500 Feet of Tape June 1-Aug

LIFE CYCLE

12 days in hot weather

Page 5: Control of thrips without pesticides: dream or reality? · Thrips / 2 tape Type of Sticky Tape a b ab b b b –E.g. Pot Mum Production 1 COMPARTMENT= 1500 Feet of Tape June 1-Aug

NON-SUSCEPTIBLE STAGES!

Page 6: Control of thrips without pesticides: dream or reality? · Thrips / 2 tape Type of Sticky Tape a b ab b b b –E.g. Pot Mum Production 1 COMPARTMENT= 1500 Feet of Tape June 1-Aug

HISTORY OF AREA • Late 1980’s

• Calendar sprays • Weekly in winter

• 2x a week in summer

• Little monitoring, IPM, or Biological control

Page 7: Control of thrips without pesticides: dream or reality? · Thrips / 2 tape Type of Sticky Tape a b ab b b b –E.g. Pot Mum Production 1 COMPARTMENT= 1500 Feet of Tape June 1-Aug

NOW (i.e. since 2007):

• IPM – standard • Monitoring – routine

• Screening

• Mass trapping

• Biological control – 80-90% of growers

Page 8: Control of thrips without pesticides: dream or reality? · Thrips / 2 tape Type of Sticky Tape a b ab b b b –E.g. Pot Mum Production 1 COMPARTMENT= 1500 Feet of Tape June 1-Aug

PESTICIDE RESISTANCE - THRIPS • Spinosad – registered in Canada in 2006

• Poor control in 6-12 mo • Pesticide residues on cuttings?

• Widespread breakdown in efficacy by 2008

• 2007: thrips became driver for biocontrol adoption

Page 9: Control of thrips without pesticides: dream or reality? · Thrips / 2 tape Type of Sticky Tape a b ab b b b –E.g. Pot Mum Production 1 COMPARTMENT= 1500 Feet of Tape June 1-Aug

What tools do we have?

Page 10: Control of thrips without pesticides: dream or reality? · Thrips / 2 tape Type of Sticky Tape a b ab b b b –E.g. Pot Mum Production 1 COMPARTMENT= 1500 Feet of Tape June 1-Aug

Biocontrol -

Foliage

Page 11: Control of thrips without pesticides: dream or reality? · Thrips / 2 tape Type of Sticky Tape a b ab b b b –E.g. Pot Mum Production 1 COMPARTMENT= 1500 Feet of Tape June 1-Aug

Amblyseius cucumeris

Biocontrol -

Foliage AMBLYLINE, THRIPEX, etc

Page 12: Control of thrips without pesticides: dream or reality? · Thrips / 2 tape Type of Sticky Tape a b ab b b b –E.g. Pot Mum Production 1 COMPARTMENT= 1500 Feet of Tape June 1-Aug

What’s in a sachet??

Page 13: Control of thrips without pesticides: dream or reality? · Thrips / 2 tape Type of Sticky Tape a b ab b b b –E.g. Pot Mum Production 1 COMPARTMENT= 1500 Feet of Tape June 1-Aug

Entomopathogenic Fungi

Biocontrol -

Foliage BotaniGard, Naturalis, etc

Page 14: Control of thrips without pesticides: dream or reality? · Thrips / 2 tape Type of Sticky Tape a b ab b b b –E.g. Pot Mum Production 1 COMPARTMENT= 1500 Feet of Tape June 1-Aug

Orius insidiosus

Biocontrol -

Foliage Boi-Orius, Thripor, Orius-

System, etc.

Page 15: Control of thrips without pesticides: dream or reality? · Thrips / 2 tape Type of Sticky Tape a b ab b b b –E.g. Pot Mum Production 1 COMPARTMENT= 1500 Feet of Tape June 1-Aug

NON-PESTICIDE SUSCEPTIBLE STAGES!

Page 16: Control of thrips without pesticides: dream or reality? · Thrips / 2 tape Type of Sticky Tape a b ab b b b –E.g. Pot Mum Production 1 COMPARTMENT= 1500 Feet of Tape June 1-Aug

NON-PESTICIDE SUSCEPTIBLE STAGES!

Target for

biological

control!

Page 17: Control of thrips without pesticides: dream or reality? · Thrips / 2 tape Type of Sticky Tape a b ab b b b –E.g. Pot Mum Production 1 COMPARTMENT= 1500 Feet of Tape June 1-Aug

Amblyseius cucumeris

Orius insidiosus

Fungi e.g. BotaniGard

Biocontrol -

Foliage

Biocontrol -

Soil

Page 18: Control of thrips without pesticides: dream or reality? · Thrips / 2 tape Type of Sticky Tape a b ab b b b –E.g. Pot Mum Production 1 COMPARTMENT= 1500 Feet of Tape June 1-Aug

Hypoaspis mites.

Biocontrol -

Soil

Hypoline-M, Entomite-M,

Hypoaspis

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Biocontrol -

Soil Atheta, Rove Beetle,

StaphyLine

Atheta/Dalotia coriaria

Page 20: Control of thrips without pesticides: dream or reality? · Thrips / 2 tape Type of Sticky Tape a b ab b b b –E.g. Pot Mum Production 1 COMPARTMENT= 1500 Feet of Tape June 1-Aug

Biocontrol -

Soil Entonem, Nemysis

Nematodes: Steinernema feltiae

Page 21: Control of thrips without pesticides: dream or reality? · Thrips / 2 tape Type of Sticky Tape a b ab b b b –E.g. Pot Mum Production 1 COMPARTMENT= 1500 Feet of Tape June 1-Aug

0

20

40

60

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100

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t = 0 t = 2 weeks t = 4 weeks t = 6 weeks t = 8 weeks

Growing media + nematode

Growing media + Plants +nematode

Me

an

nu

mb

er

of n

em

ato

de

/g o

f d

ry s

oil The difference becomes wider

as the plants grow bigger

Nematode

population drops

dramatically as

the application

stops

Application stopped at week 6

Nematodes – Steinernema feltiae

Page 22: Control of thrips without pesticides: dream or reality? · Thrips / 2 tape Type of Sticky Tape a b ab b b b –E.g. Pot Mum Production 1 COMPARTMENT= 1500 Feet of Tape June 1-Aug

Amblyseius cucumeris Hypoaspis / Stratiolaelaps spp.

Orius insidiosus Nematodes: Steinernema feltiae

Fungi e.g. BotaniGard

Biocontrol -

Foliage

Biocontrol -

Soil

Atheta/Dalotia coriaria

Page 23: Control of thrips without pesticides: dream or reality? · Thrips / 2 tape Type of Sticky Tape a b ab b b b –E.g. Pot Mum Production 1 COMPARTMENT= 1500 Feet of Tape June 1-Aug

Combining bios so there’s no escape!

Western flower thrips

Page 24: Control of thrips without pesticides: dream or reality? · Thrips / 2 tape Type of Sticky Tape a b ab b b b –E.g. Pot Mum Production 1 COMPARTMENT= 1500 Feet of Tape June 1-Aug

Mums as a case study: Integrate biocontrol throughout the production system

Research plant risks Choose resistant plants

“Use” susceptible plants Reduce fertilizer

Propagation

Use Mite sachets Microbials Nematodes

Broadcast Cucumeris Microbials Nematodes Hypoaspis

Atheta

Planning Production Finishing

Swirskii sachets Microbials

Page 25: Control of thrips without pesticides: dream or reality? · Thrips / 2 tape Type of Sticky Tape a b ab b b b –E.g. Pot Mum Production 1 COMPARTMENT= 1500 Feet of Tape June 1-Aug

Amblyseius cucumeris Hypoaspis / Stratiolaelaps spp.

Orius insidiosus Nematodes: Steinernema feltiae

Fungi e.g. BotaniGard

Biocontrol -

Foliage

Companion

Strategies Biocontrol -

Soil

Atheta/Dalotia coriaria

?

?

?

Page 26: Control of thrips without pesticides: dream or reality? · Thrips / 2 tape Type of Sticky Tape a b ab b b b –E.g. Pot Mum Production 1 COMPARTMENT= 1500 Feet of Tape June 1-Aug

COMPANION STRATEGIES

1. Trap plants • Flowering yellow mums

• Highly susceptible varieties: Vyron, Chesapeake

• Use with: • Other mum varieties

• Vegetative / foliage crops

• herbs

Page 27: Control of thrips without pesticides: dream or reality? · Thrips / 2 tape Type of Sticky Tape a b ab b b b –E.g. Pot Mum Production 1 COMPARTMENT= 1500 Feet of Tape June 1-Aug

COMPANION STRATEGIES

2. Mass trapping with sticky tape

• Used in biocontrol programs based on non-flying natural enemies

Page 28: Control of thrips without pesticides: dream or reality? · Thrips / 2 tape Type of Sticky Tape a b ab b b b –E.g. Pot Mum Production 1 COMPARTMENT= 1500 Feet of Tape June 1-Aug

0

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50

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1

Mea

n B

iwee

kly

Th

rip

s C

ou

nts

/

2 f

eet

of

tap

e

Type of Sticky Tape

a

b ab

b b b

–E.g. Pot Mum Production

1 COMPARTMENT= 1500 Feet of Tape

June 1-Aug 15:

= 647, 872 thrips/

compartment removed!

The Power of Sticky Tape!

SEE THE DETAILS: GREENHOUSE CANADA WEBINAR And

GREENHOUSEIPM.ORG

Page 29: Control of thrips without pesticides: dream or reality? · Thrips / 2 tape Type of Sticky Tape a b ab b b b –E.g. Pot Mum Production 1 COMPARTMENT= 1500 Feet of Tape June 1-Aug

COMPANION STRATEGIES

3. Dipping cuttings – starting clean • Most effective treatments on mums for thrips:

• Beauveria

• Horticultural oil at 5 ml/L for 1 min, then rinsed

Page 30: Control of thrips without pesticides: dream or reality? · Thrips / 2 tape Type of Sticky Tape a b ab b b b –E.g. Pot Mum Production 1 COMPARTMENT= 1500 Feet of Tape June 1-Aug

SUCCESSFUL BIOCONTROL OF A DIFFICULT PEST • Take whole production system into

account

• Susceptible stages/varieties targeted

• Uses companion strategies to improve results