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Forages: Grasshoppers (Various species)

Author: OMAFRA Staff
Creation Date: 04 July 2005
Last Reviewed: 28 July 2007
Pub 812: Field Crop Protection Guide > Chapter 4 : Forages > Grasshoppers

Excerpt from Chapter 4, Field Crop Protection Guide, Order this publication

Table of Contents

  1. Description
  2. Integrated Pest Management Options
  3. 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.

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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.

cyhalothrin-lambda – Matador 120 E
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

Comments
Alfalfa only. Ground or aerial application. Apply when larvae are small and populations are high. Maximum of 3 applications per year, 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.

malathion – Malathion 500 EC
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

Comments
For alfalfa and clover. Do not apply during bloom. Apply when 75% of foliage shows feeding damage. Less effective below 20°C (68°F). 7 days to cutting or grazing.

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Related links...

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