In This Section

Topics

Table 9-7. Relative Toxicity of Insecticides to Honeybees

Author: OMAFRA Staff
Creation Date: 28 June 2005
Last Reviewed: 15 June 2009
Pub 812: Field Crop Protection Guide > Chapter 9: Pesticides Used on Field Crops in Ontario

Excerpt from Chapter 9, Field Crop Protection Guide, Order this publication

Table 9-7. Relative Toxicity of Insecticides to Honeybees
Active Ingredient
Trade Name
Group 1 - Very toxic. Do not apply to flowering crops or weeds
Cygon 480
Lagon 480
dimethoate
Furadan 480 F
carbofuran
Imidan 50 WP
phosmet
Lannate Toss-N-Go
methomyl
Lorsban 4E
Pyrifos 15G
Pyrinex 480 EC
chlorpyrifos
Malathion 500 EC
malathion
Ripcord 400EC
cypermethrin
Sevin XLR
carbaryl
Group 2 - Apply only during late evenings or early morning1
Decis 5.0 EC
deltamethrin
Thiodan 4 EC
Thionex EC
endosulfan

[1]Unusually low temperatures at time of application may cause insecticides to remain toxic up to 20 times longer than during warm weather. High temperatures in the early morning or late evening may extend active foraging by bees.

Related Links


For more information:
Toll Free: 1-877-424-1300
Local: (519) 826-4047
E-mail: ag.info.omafra@ontario.ca