Forages:
Potato Leafhopper (Empoasca fabae)
| Author: | OMAFRA Staff
| | Creation Date: | 04
July 2005 | | Last Reviewed: |
15 June 2009 |
Excerpt from Chapter
3, Field Crop Protection Guide, Order
this publication Table of Contents - Description
- Integrated
Pest Management Options
- Related links...
DescriptionAdults
are pale-green, wedge-shaped, winged insects about 3 mm long with piercing and
sucking mouth parts. Adults are broadest towards the head, the body tapering evenly
to the wing tips. They have a row of six rounded, white spots behind their head.
Nymphs are smaller than adults and are wingless. 
Image 1. Potato leafhoppers are pale green, wedge-shaped, winged insects. Immature
nymphs are smaller and wingless. Integrated
Pest Management OptionsLeafhoppers are most severe in new seedings and
in regrowth under hot dry weather. Some resistant varieties having glandular hairs
on the leaves and stems have been found to be effective. Use chemical control
only if leafhoppers exceed the threshold, as insecticides will also kill effective
natural enemies of alfalfa weevil.
See OMAFRA Publication 811, Agronomy
Guide for Field Crops, for threshold charts.
dimethoate – Cygon 480 EC, Lagon 480 EC
| | Cygon 480 E | Lagon 480 EC |
| Active Ingredient | dimethoate | dimethoate |
| Trade Name | Cygon 480 EC | Lagon
480 EC | | Rate per hectare
(product) | 425 mL per ha | 425 mL per ha | |
Rate per acre (product) | 170 mL per ac | 170 mL per ac |
Comments (Days to harvest, label precautions, etc.)
Alfalfa,
forage and pasture. Ground and aerial application. Do not apply during
bloom. 2 days to harvest and grazing. No more than 2 applications per season.
cyhalothrin-lambda – Matador 120 E
| Active ingredient | cyhalothrin-lambda |
| Trade name | Matador 120
E | | Rate per hectare (product) | 83
mL per ha | | Rate per acre
(product) | 34 mL per ac | Comments
(Days to harvest, label precautions, etc.)
Alfalfa
only. Ground or aerial application. Apply when larvae are small and populations
are high. Maximum 3 applications/yr, 1 may be by air. Allow 7 days between treatments.
Do not apply within 3 days of livestock grazing. Alfalfa seed from treated crop
is not to be used for production of alfalfa sprouts for human consumption. 24-hr
re-entry period.
cyhalothrin-lambda
– Silencer 120 EC |
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 |
Comments (Days to harvest, label precautions, etc.)
Alfalfa only.
Ground application only. Apply when larvae are small and populations
are high. Maximum 3 applications/yr,
1 may be by air. Allow 7 days between
treatments. Do not apply within 3 days of livestock grazing. Alfalfa seed from
treated crop is not to be used for production of alfalfa sprouts for human consumption.
24-hr re-entry period.
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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