CSC Regulatory and Research Update

Dan Legard – Director of Research

Hillary Thomas – Research Manager

California Strawberry Commission

US MB CUEs for Pre-Plant Uses

-

1,000,000

2,000,000

3,000,000

4,000,000

5,000,000

6,000,000

7,000,000

8,000,000

2009 2010 2011 2012 2013

Po

un

ds

of

Met

hyl

Bro

mid

e

Other Crops

CA Strawberry

Methyl Bromide Use on Strawberry

-

500,000

1,000,000

1,500,000

2,000,000

2,500,000

3,000,000

2009* 2010 (est) 2011 (est) 2012 (est) 2013 (est)

Po

un

ds

of

Me

thy

l B

rom

ide

Santa MariaOxnardMonterey/Santa CruzCA Strawberry CUE

*based on Cal DPR Pesticide use reports

Methyl Bromide Use on Strawberry

3,230

2,643

2,349

1,891

1,299

-

2,000

4,000

6,000

8,000

10,000

12,000

14,000

16,000

18,000

2009* 2010 (est) 2011 (est) 2012 (est) 2013 (est)

Acr

es

Tre

ate

d @

150

lb

s/a

Santa Maria

Oxnard

Monterey/Santa Cruz

*based on Cal DPR Pesticide use reports

Other Fumigants - California

• Midas court case meets in January 2012

• Chloropicrin re-assessment to come out in

2012

– May have significant changes to current

restrictions

Various Film Structures

Mono-Layer Blend

LLDPE & MDPE

PE & Tie

PE & Tie

Nylon

Mono-Layer Blend LLDPE,

MDPE, & REPRO

PE

PE

Nylon

TIE

TIE

PE

PE

EVOH

TIE

TIE

PE

PE

EVOH TIE

TIE

PE

PE

STD STD 3-layer

VIF 5-layer

VIF 5-layer

TIF 7-layer

TIF

F U M I G A N T B A R R I E R

POOR POOR MEDIUM MEDIUM HIGH HIGH

P H Y S I C A L P R O P E R T I E S

GOOD HIGH POOR MEDIUM POOR HIGH

Chloropicrin Peak Flux Rates for

Tarped Shallow Broadcast Applications

GAP-compliant + polyethylene tarp.

Drip application with workable buffer zones

GAP-compliant + TIF

TIF use in CA strawberry

• Was some use in all of the main production regions

– Primarily with broadcast applications of Telone C60

– Some limited “trial” use with straight chloropicrin

• Cost of TIF is about 80% more than PE

• Preliminary results

2011 Lygus Monitoring Program: IPM for Industry

Lygus Management Project

Phase I -

Train growers to scout for Lygus (Jan/Feb) Site-specific weather stations -> growers implement the degree day model

Phase II – Conduct resistance testing to aid growers in spray decisions (July/Aug)

Results: Degree Day predictions were later than actual population peaks

• Possible causes: late set date, poor weather data

Results: Resistance Testing

0

20

40

60

80

100

120 Malathion/ActaraDanitol/Actara

Pe

rce

nt

Mo

rtal

ity

•Dibrom/Actara tank Mix had 100 percent mortality at all but 1 site • Results were variable and context specific • Spray patterns were predictable from resistance data

Summary

Practice: • Growers allocated largely to PCAs to sample • Weekly systematic monitoring is rare; visual scouting is common • OP and pyrethroid use is widespread; new chemistry insect growth regulators not as much, timing wasn’t always optimal

Degree day Model: •Predictions are difficult to fine-tune; systematic sampling necessary

Resistance Testing • Resistance variable by site and practice

Thank You