Soybean Aphid (Aphis
glycines)
Pub 812: Field Crop Protection
Guide >
Pub 812:
Soybeans > Soybean Aphid
Field Crop Protection Guide 2011-2012, Order
2011-2012 publication
Table of Contents
- Description
- Integrated Pest Managment Options
- Seed Treatment
- thiamethoxam - Cruiser 5 FS
- thiamethoxam + metalaxyl-M + fludioxonil - Cruiser Maxx
Beans
- Foliar Treatment
- cyhalothrin-lambda - Matador 120 E, Silencer 120 EC
- dimethoate - Cygon 480 EC, Lagon 480 EC
- imidacloprid + deltamethrin - Concept
- Related links...
Description
Figure 1. Close
up of soybean aphid. Note black-tipped "tailpipes".
For more details see OMAFRA factsheet Soybean Aphid
(Order #04-059).
Integrated Pest Management Options
Seed Treatment
Foliar treatment at threshold is the recommended method of control.
However, seed treatments for the control of other soil insect pests
may provide early-season protection (up to 40 days after planting)
from early infestations of soybean aphids.
| Active ingredient |
thiamethoxam |
| Trade name |
Cruiser 5 FS |
| Rate (product) |
83 mL per 100 kg seed |
| Comments |
For use in commercial seed treatment facilities only.
Provides only early-season protection. Will not protect crop
against typical mid-to-late-season aphid infestations. Compatible
with Rhizobium-based inculants. Check with inoculant
manufacturers for details prior to use. Do not graze or feed
livestock on treated areas for 45 days after planting. |
| Active ingredient |
thiamethoxam + metalaxyl-M + fludioxonil |
| Trade name |
Cruiser Maxx Beans |
| Rate (product) |
195 mL per 100 kg seed |
| Comments |
For use in commercial seed treatment facilities only.
Provides early-season protection. Will not protect crop against
typical mid-to-late season aphid infestations. Compatible with
Rhizobium-based inculants. Check with inoculant manufacturers
for details prior to use. Do not graze or feed livestock on
treated areas for 45 days after planting. |
Foliar Treatment
Foliar treatment is the recommended method of control
for soybean aphids. Aphid infestations are more likely to cause
yield reduction if the plants are already suffering from drought
conditions or another stress factor.
Scout fields frequently. Apply foliar insecticide
when threshold of "250 aphids per plant with increasing populations"
has been reached in the R1-R5 stage of soybeans. If aphid populations
do not appear to be on the increase above 250 per plant, do not
apply insecticide, as it will kill off the beneficial insects that
are keeping the aphid population in check. Aphids are then likely
to increase quickly in the absense of their predators and could
easily reach threshold.
For further information on scouting techniques, thresholds
and management options, see OMAFRA Publication 811, Agronomy
Guide for Field Crops.
| Active ingredient |
cyhalothrin-lambda |
| Trade name |
Matador 120 E |
| Rate per hectare (product) |
83-233mL per ha |
| Rate per
acre (product) |
34-94 mL per ac |
| PHI* |
21 |
| Comments |
Ground and aerial application. For
best results, apply during the early morning, before temperatures
rise, and during the evening. Use higher rate when conditions
favour rapidly increasing populations or when crop canopies
are dense, resulting in poor spray coverage. Select nozzle size,
type and pressure to produce a medium spray. Use 100-200 L water/ha
for ground application, 10-40 L water/ha for aerial application.
Maximum 3 applications/yr. 24-hr re-entry period. |
| Active ingredient |
cyhalothrin-lambda |
| Trade name |
Silencer 120 EC |
| Rate per hectare (product) |
83 mL per ha |
| Rate per
acre (product) |
34 mL per ac |
| PHI* |
21 |
| Comments |
Ground application only. For
best results, apply during the early morning, before temperatures
rise, and during the evening. Maximum 3 applications/yr. 24-hr
re-entry period. |
| Active ingredient |
dimethoate |
| Trade name |
Cygon 480 EC |
| Rate per hectare (product) |
1 L per ha |
| Rate per acre (product) |
400 mL per ac |
| PHI* |
30 |
| Comments |
Ground and aerial application. Use high volume, high pressure
and ensure good coverage. Maximum 3 applications/yr. |
| Active ingredient |
dimethoate |
| Trade name |
Lagon 480 EC |
| Rate per hectare (product) |
1 L per ha |
| Rate per acre (product) |
400 mL per ac |
| PHI* |
30 |
| Comments |
Ground and aerial application. Use high volume, high pressure
and ensure good coverage. Maximum 3 applications/yr. |
| Active ingredient |
imidacloprid + deltamethrin |
| Trade name |
Concept |
| Rate per hectare (product) |
325-650 mL per ha |
| Rate per acre (product) |
131-263 mL per ac |
| PHI* |
20 |
| Comments |
Do not apply this product if following a seed treatment or
soil application of a Group 4 Insecticide (neonicotinoids) within
that season. Ground application only. Use high
rate for fastest knockdown and best residual control. Minimum
of 5 days between applications. Maximum 3 applications/yr. 24-hr
re-entry period. |
Related links...
