Using Mass Trapping in a Thrips IPM program Ashley Summerfield Mass - - PowerPoint PPT Presentation

Using Mass Trapping in a Thrips IPM program

Ashley Summerfield

Mass Trapping

• Sticky cards, tape or trap plants
• Easy to implement
• Inexpensive
• Mass trapping is most effective

for dispersing thrips

– Entry points

• Every thrips caught = big impact
• n future population

Sticky Cards

• Small cards excellent monitoring tool
• Larger cards & tape for mass trapping
• Cards & tape can be equally effective

Sticky Cards

• Thrips are poor fliers
• Do not put cards too high above

crop

• Put some cards under benches
• Examine sticky cards weekly to

assess pest numbers

• Mass trapping cards/tape can

be left up for several weeks

Sticky Cards

• Both yellow and blue sticky cards

are equally attractive to thrips

• Yellow is attractive to many species;
• can also be used to mass‐trap

whiteflies, fungus gnats & shore flies

• Blue is more specific to thrips
• less attractive to other species
• Use blue to avoid trapping flying

beneficials

• Avoid blue when using bumblebees

Sticky Cards

• New patterned sticky roll “Optiroll Super”
• Developed by BioPol Natural (Netherlands) & Russel IPM (UK)
• Greenhouse trials in South America reported blue Optiroll substantially

increased thrips captures

• Already being used in Ontario

Trap Plants

• Yellow mums & marigolds
• Adult thrips prefer plants with

flowers

• Attractiveness of flowers is

influenced by

• Volatiles
• Pollen
• Colour
• Nutritional value
• May be used as banker plants
• Replace trap plants weekly

Trap Plants

• Adult thrips are

significantly more attracted to flowering trap plants than non‐ flowering crop

• Trap plants more

effective while adults are dispersing

100 200 300 400 500 600

Number of thrips per plant

Plante piège Culture

Vegetative Buds Crack‐bud

Trap plant Crop plant

10 20 30 40 50 60 70 Number of thrips per plant

A B a b Resident Dispersing

Trap plants

1 2 3 4 1 2 3 4 Week Number of WFT adults

Control Trap plants

• Trap plants effectively reduce thrips population in

crop in commercial setting

Trap Plants

Trap placement

• Interspersed pattern better than barrier pattern
• Increase concentration of trap plants near entry points

>

Interspersed Barrier

Thrips lures

neryl‐S‐2‐methylbutanoate (Thripline ams, Syngenta Bioline)

• Thrips aggregation pheromone
• Marketed as a monitoring tool
• Improve mass trapping?
• Improve biocontrol?
• Agitating thrips (more contact)
• Attracting predators

Thrips lures

Research at Vineland

Does the addition of thrips semiochemicals improve efficacy of mass trapping by sticky cards and trap plants?

Thrips lures

Research at Vineland

• 100
• 50

50 100 150 200 250 1 2 3 % population increase of larvae Week #

Control Sticky cards Sticky cards + lure Trap plants Trap plants + lure

50 100 150 200

Mean adult thrips/trap plant Week #

1 2 3

50 100 150 200 250 300 350

Mean adult thrips/card Week #

1 2 3

• More thrips caught on trap plants with

lures

• More thrips caught on sticky cards with

lures

• Both sticky cards and trap plants more

effective with lures

• Trap plants more effective than sticky

cards

Trap plant + lure Trap plant Sticky card + lure Sticky card

Thrips lures

• Similar results found by two independent research

groups in strawberries (UK) & roses (Australia)

• Commercial trials, natural thrips pressure

Sampson & Kirk, 2013 Broughton et al., 2015

Conclusions

• Mass trapping a useful tool in thrips IPM toolkit
• Sticky Cards
• Pros: low maintenance, kills thrips, versatile, useful for multiple

pests

• Cons: may also catch flying bios
• Trap Plants
• Pros: more attractive to thrips, will not kill flying bios, may be

used as banker

• Cons: higher maintenance than cards
• Optimize both methods with proper placement &

addition of lures