Forages: Grasshoppers (Various
species)
Pub 812: Field Crop Protection
Guide >
Chapter
3: Forages > Grasshoppers
Field Crop Protection Guide 2011-2012, Order
2011-2012 publication
Table of Contents
- Description
- Integrated Pest Management Options
- cyhalothrin-lambda – Matador 120 E, Silencer 120 EC
- malathion – Malathion 500 EC
- Related links...
Description
There are several species of grasshopper that may attack forages.
They vary in colour from green to brown. Nymphs look similar to
adults but are smaller and have incomplete wings. Both stages feed
by chewing. All species have enlarged hind legs for jumping.
Integrated Pest Management Options
Begin scouting in late June when grasshoppers are still young.
Spraying insecticides on alfalfa will also kill the natural enemies
of alfalfa weevil and lygus bugs.
| Active ingredient |
cyhalothrin-lambda |
| Trade name |
Matador 120 E |
| Rate per hectare (product) |
63-83 mL per ha |
| Rate per acre (product) |
26-34 mL per ac |
| PHI* |
3 (livestock foraging) |
| Comments |
For use in alfalfa only. Ground and aerial
application. Allow 7 days between treatments. Alfalfa seed from
treated crop is not to be used for production of alfalfa sprouts
for human consumption. Maximum 3 applications/yr. Do not apply
more than 1 application by air. 24-hr re-entry period. |
| Active ingredient |
cyhalothrin-lambda |
| Trade name |
Silencer 120 EC |
| Rate per hectare (product) |
63-83 mL per ha |
| Rate per acre (product) |
26-34 mL per ac |
| PHI* |
3 (livestock foraging) |
| Comments |
For use in alfalfa only. Ground and aerial
application. Allow 7 days between treatments. Alfalfa seed from
treated crop is not to be used for production of alfalfa sprouts
for human consumption. Maximum 3 applications/yr. Do not apply
more than 1 application by air. 24-hr re-entry period. |
| Active ingredient |
malathion |
| Trade name |
Malathion 500 EC |
| Rate per hectare (product) |
2.25-2.75 L per ha |
| Rate per acre (product) |
0.9-1.1 L per ac |
| PHI* |
7 |
| Comments |
For use in alfalfa and clover. Do not apply
during bloom. Apply when 75% of foliage shows feeding damage.
Product is less effective when temperatures are below 20°C
(68°F). |
Related links...
