csc regulatory and research update - uc anr
TRANSCRIPT
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
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