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Soybeans: Phytophthora
Root Rot (Phytophthora sojae)
Pub 812: Field Crop Protection
Guide > Pub 812:
Soybeans > Phytophthora Root Rot
Field Crop Protection Guide 2011-2012, Order
2011-2012 publication
Table of Contents
- Integrated Pest Management Options
- Seed Treatment
- fludioxonil + metalaxyl-M – Apron Maxx RFA, Apron
Maxx RFC
- thiamethoxam + metalaxyl-M + fludioxonil - Cruiser Maxx
Beans
- metalaxyl-M - Apron XL-LS
- metalaxyl – Allegiance FL, Apron FL
- Related links...
Integrated Pest Management Options
Seed Treatment
Select soybean varieties that have both specific resistance (Rps
genes such as 1K and 1C) and good partial resistance (tolerance)
to all races of Phytophthora. Consult with your seed company
and the Ontario Oil and Protein Seed Crop Committee Variety Trial
Results at www.gosoy.ca for variety profiles. This disease is primarily
controlled through resistant varieties. Crop losses are greatest
in cold, wet, clay soils. Try to minimize soil compaction and remove
excess moisture through improved drainage. A small amount of tillage
will help warm the soil and improve surface drainage. Rotate soybeans
with corn and wheat. Plant seen when soil temperatues are above
13°C.
| Active ingredient |
fludioxonil + metalaxyl-M |
| Trade name |
Apron Maxx RTA |
| Rate (product) |
325 mL per 100 kg seed |
| Comments |
For both commercial seed treatment plants and on-farm treatment
using standard gravity- or mist-type seed treatment equipment.
Provides early-season protection for tolerant varieties. If
target fields have a history of high Phytophthora pressure,
or if susceptible varieties are to be treated, tank-mix with
31 mL per 100 kg seed of Apron XL LS. Compatible with Rhizobium-based
inoculants. Check with inoculant manufacturers prior to use.
Ensure uniform coverage. |
| Active ingredient |
fludioxonil + metalaxyl-M |
| Trade name |
Apron Maxx RFC |
| Rate (product) |
100 mL plus 230 mL of water per 100 kg seed |
| Comments |
For both commercial seed treatment plants and on-farm treatment.
Compatible with Rhizobium-based inoculants. Check with
inoculant manufacturers for details prior to use. Do not graze
or feed livestock on treated areas for 45 days after planting.
Provides early-season protection against phytophthora root rot
for tolerant varieties of soybeans. If target fields have a
history of high pressure or if susceptible varieties are to
be treated, tank-mix with 31 mL of Apron XL LS per 100 kg seed.
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| Active ingredient |
thiamethoxam + metalaxyl-M + fludioxonil |
| Trade name |
Cruiser Maxx Beans |
| Rate (product) |
195 mL per 100 kg seed |
| Comments |
For use in commercial treatment facilities only.
Compatible with Rhizobium-based inoculants. Check with
inoculant manufacturers for details prior to use. Do not graze
or feed livestock on treated areas for 45 days after planting.
Provides early-season protection against phytophthora root rot
for tolerant varieties of soybeans. If target fields have a
history of high pressure or if susceptible varieties are to
be treated, tank-mix with 31 mL of Apron XL LS per 100 kg of
seed. |
| Active ingredient |
metalaxyl-M |
| Trade name |
Apron XL-LS |
| Rate (product) |
40 mL per 100 kg seed |
| Comments |
For us in commercial seed treatment facilities only.
Do not use in hopper-box, planter-box, slurry-box or other non-commercial
seed treatment applications at or immediately before planting.
Do not graze or feed livestock on seeded area for 4 weeks after
planting. Read label for information regarding resistant strains
of fungus. |
| Active ingredient |
metalaxyl |
| Trade name |
Allegiance FL |
| Rate (product) |
46-93 mL per 100 kg seed |
| Comments |
Do not graze or feed livestock on seeded area for 4 weeks
after planting. |
| Active ingredient |
metalaxyl |
| Trade name |
Apron FL |
| Rate (product) |
46-93 mL per 100 kg seed |
| Comments |
Do not graze or feed livestock on seeded area for 4 weeks
after planting. |
Related links...
For more information:
Toll Free: 1-877-424-1300
Local: (519) 826-4047
E-mail: ag.info.omafra@ontario.ca
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