Dow AgroSciences Fungicides

for the control of

P. Welles, DAS, 2003

for the control of

Asian Soybean Rust Phakopsora pachyrhizi

Control strategies

• Fungicides are most effective in preventative control programs

• All stages of crop are susceptible assuming favorable environmental conditions & viable pathogen.

Vegetativestages

• Current findings* indicate R1 is the optimal time to begin applications.

• Second application* 20+ days later depending upon disease pressure

*Based on DAS experiences in South America & Africa

R1 – R2bloom

Control StrategiesScouting of crop is still critical to determining optimum time to begin treatments in your crop

R1 – R2Bloom

R8 Mature

R7Matur-ing

R6FullSeed

R5SeedsForming

R3-R4Pods

Forming

VegetativeStages

Optimum Disease Conditions•Viable pathogen and susceptible host present•Minimum of 6 hours leaf wetness (dew or rain); 10-12 hrs maximum infection•Temperature – 60°to 80°F•Relative Humidity – 75% - 80%

Laredo* EC & EWEPA Reg No. 62719-493Active ingredient: MyclobutanilFormulation: 20EW (20% ai, 1.67lb/gal)

DAS Soybean Rust FungicidesAvailable under Current Section 18’s

Formulation: 20EW (20% ai, 1.67lb/gal)

PropiMax* ECEPA Reg No. 62719-346Active ingredient: PropiconazoleFormulation: 3.6EC (41.8% ai, 3.6lb/gal)

� Chemical group : Triazole (FRAC code group 3)

� Active Ingredients : Laredo (Myclobutanil) & PropiMax (Propiconazole)

� Mode of action : Sterol Demethylation inhibitor.

� Systemic fungicides with rapid foliar uptake and redistribution in plant

� Triazoles provide preventative control with some curative potential

� Amount of systemic movement and curative activity will vary by productTRIAL Folicur Eminent Quadris Stratego Pristine Headline Endura

(Oz/Ac) 7.13 14.3 6.2 7.4 9.6 9.6 5.6

Laredo EW 8.56

Laredo/PropiMax equal to Laredo/PropiMax better than Laredo/PropiMax worse than

CAMBÉ (PR)

8.56

PropiMax 7.14

Laredo EC 7.13

RIO VERDE

(GO)

Laredo EW 8.56

PropiMax 7.14

Laredo EC 7.13

Laredo* EW/EC�US Registrations include grapes, stone fruit, cherries, almonds, small fruits, strawberries, apples, cucurbits, tomatoes, snap beans, asparagus, turf. Soybean section 3 submission (2005)

Directions for use:Apply 6.8 - 8.5 fl oz/acre (1.4 – 1.75 oz ai/acre).Ground or air applicationGround or air applicationApply early, before or at first signs of disease.Make a sequential application at 14-21 day interval.

Use restrictions:REI is 24 hours.PHI is 28 days.Don’t exceed 2 applications or more than 16 fl oz of Laredo (0.25 lb ai myclobutanil/acre/year).30 day rotational restriction to crops not listed on Laredo label.

PropiMax * EC� Registered in multiple crops in US including: cereals (wheat, barley, rice), grasses grown for seed, corn, stone fruit, peanuts, pecans, celery, pineapple and sugarcane. Soybean registration pending

Directions for use:Apply 4 - 6 fl oz/acre (1.8 – 2.7 oz ai/acre).Ground or air applicationApply early, before or at very first signs of disease.Apply early, before or at very first signs of disease.Make sequential applications at 14-21 day intervals.

Use restrictions:REI is 24 hours.PHI is 28 days.105 day crop rotational interval for crops not listed on PropiMax label for food, grazing or any component of animal bedding.Don’t exceed 4 applications or apply more than 16 fl oz of PropiMax (0.25 lb ai propiconazole/acre/year).

Application Recommendation

•COVERAGE Breaking through the canopy and covering lower leaves is critical to control

•Water Volume: Air – 5-10 GPA; Ground – 15-25 GPAHigher water volume equals better coverage

•Nozzles: Hollow Cone – 20” spacing; 2-3 feet above the canopy. Provide better air & canopy movement; Finer droplet size

•Spray Pressure: 20-60 PSI. Higher pressures will provide better canopy movement and better lower canopy coverage

•Ground Speed: 3-10 MPH.

•DAS has conducted efficacy trials throughout South American soybean growing areas since 2002

•In 2004 Brazilian trials, at recommended rates, Laredo & PropiMax performance was equal to or greater than all products currently under US EPA section 18 or Section 3, for soybeans

Dow AgroSciences Soybean Fungicide Efficacy Studies

for soybeans

Eminent Quadris Folicur Stratego PristineHead-line Endura

Laredo EW 10 7 3 10 10 5 5 10 10

Laredo EC 10 6 4 10 10 5 5 10 10

PropiMax EC 8 2 8 2 10 10 6 4 10 10

n Laredo/PropiMax equal to n Laredo/PropiMax better than n Laredo/PropiMax worse than

n = number of times in 10 observations

Dow AgroSciences Soybean Fungicide Efficacy Studies

Trials are currently being established, in the US, across the Midwest and into the southern states, to define application recommendations; compatibility; crop yield impact

DAS Soybean Fungicides

SECTION 18 FUNGICIDES COMPARATIVE PERFORMANCE STUDY

2003/04 SEASON - BRAZIL

Eminent Quadris FolicurStratego.+Nimb. Pristine

Head-line Endura

Laredo EW 10 7 3 10 10 5 5 10 10

Laredo EC 10 6 4 10 10 5 5 10 10

PropiMax EC 8 2 8 2 10 10 6 4 10 10

n = number of times in 10 observations

n nLaredo/PropiMax equal to Laredo/PropiMax worse thann Laredo/PropiMax better than

Fungicide Formulation Use Rates

TreatmentActive

Ingredient

US

Type Oz/Ac g ai/haBrand Name

Systhane* EC myclobutanil Laredo EC 7.13 125

Laredo* EW myclobutanil Laredo EW 8.56 125

PropiMax*, Tilt, Bumper propiconazole PropiMax EC 7.14 125

Score Difenoconazole Not registered EC

Opera

pyraclostrobin + epoxiconazole*

Cabrio, Headline SE 9.6 168

Folicur CE tebuconazole Elite/Folicur EC 7.13 100

Strategotrifloxystrobin + propiconazole Stratego EC 7.4 130

Priore azoxystrobin Quadris SC 6.2 110

* Not Registered in US

AC

AM

RRAP

PA

ROMT

TO

MA

PI

CERN

BA

PB

AL

SE

PE

Dow AgroSciences Soybean Fungicide Efficacy studies

Brazil 2004

MG

GO

MS

SP

PR

SC

RS

ES

RJ