Insecticides Insects Minor Use Pest Management Post-Harvest Vegetables

Minor use label expansion for malathion for brown marmorated stink bug

J. Chaput, OMAFRA, Minor Use Coordinator, Guelph

The Pest Management Regulatory Agency (PMRA) recently announced the conditional approval of the 3rd Canadian minor use label expansion for brown marmorated stink bug (BMSB) for MALATHION 85E insecticide (malathion) for suppression of BMSB on a large number of currently labeled crops in Canada. MALATHION 85E was already labeled for management of a variety of insect pests on several crops in Canada.

This minor use submission for BMSB was sponsored in 2011 by the minor use office of OMAFRA in response to the urgent threat posed to agriculture by this new invasive pest and minor use priorities identified by producers and extension personnel in Canada.

BMSB has a very wide host range (over 300 known plant species) including many important agricultural crops such as tree fruit, berries, vegetables, corn, cereal grains, ornamentals and many others. Damage from BMSB has been extensive in many areas of the U.S. in recent years and crop losses have been severe.

Management of BMSB is very difficult and a significant research effort is underway to determine the best combination of integrated management strategies. Although the use of insecticides such as Malathion can help to reduce BMSB populations and damage in some crops, the longer term approach will require a robust combination of pest management strategies. For more information about BMSB visit:

In an unusual step, the PMRA has granted this label expansion with the condition that additional confirmatory efficacy data be provided by December 2016. The following is provided as an abbreviated, general outline only. Users should consult the complete label before using Malathion 85E insecticide for BMSB.

Crop Pest Product rate (mL/ha) Maximum number of applications Days before harvest
Apple, Pears Suppression of Brown Marmorated Stink Bug (Halyomorpha halys (Stål)) 1220 2 3
Apricots 1220 2 7
Blackberry, Boysenberry, Dewberry, Loganberry 975 2 7
Blueberries 1000 3 1
Cherries, Plums 880 2 3
Grapes 880 1 3
Peaches 855 2 7
Raspberries 1345 2 1
Strawberries 975 2 3
Beans 1345 2 3
Celery, Swiss chard, watercress 1100 1 7
Cucumbers, Pumpkins, Squash 880 2 3
Eggplant, Peppers 1345 2 3
Lettuce, head 1345 1 3
Lettuce leaf 1345 1 14
Melons 1345 2 3
Peas 1100 2 3
Spinach 1345 2 7
Tomatoes 975 2 3
Corn, barley, oats, rye, wheat 1345 4-5 5 (corn),
7 (cereals)
Lentils 830 2 14
Outdoor ornamentals 1220 5 N/A

We wish to acknowledge the personnel of Loveland Products Canada Inc. for their support of this registration and the personnel of the Pest Management Regulatory Agency for evaluating and approving this important pest management tool.Malathion insecticide should be used in an integrated pest management program and in rotation with other management strategies. Follow all other precautions and directions for use on the Malathion insecticide label.

For copies of the new supplemental label contact Hannah Fraser, OMAFRA, Vineland (905) 562-1674, Jim Chaput, OMAFRA, Guelph (519) 826-3539 or visit the UAP Canada website at

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