Miticides for fruiting vegetables

Two-spotted spider mite on a tomato leaf
Two-spotted spider mite on a tomato leaf

There have been several miticide registrations for field vegetable crops recently in Canada. To help you keep track, here are some quick reference tables for fruiting vegetables.

Spider mites are usually kept under control by natural enemies, but populations may explode when conditions are very favourable to mites or after natural enemies populations have been set back by insecticide applications. Some organophosphate and pyrethroid insecticides actually cause the spider mites to reproduce at a faster rate.

Field tomatoes

Trade name (active ingredient) Chemical group Labelled pests Notes
Acramite 50WS (bifenazate) Unknown Two-spotted spider mite Contact activity. Good coverage of foliage is important. Quick knockdown.
Oberon Flowable (spiromesifen) Group 23 Broad mite, two-spotted spider mite Contact activity. Translaminar movement, but thorough coverage of foliage is important. An adjuvant may be used to improve coverage and control. Also effective against eggs.
Malathion 25W (malathion) Group 1B Two-spotted spider mite Registered, but not considered effective. Use of organophosphate insecticides can worsen two-spotted spider mite infestations.
Malathion 85E (malathion) Group 1B Two-spotted spider mite Registered, but not considered effective. Use of organophosphate insecticides can worsen two-spotted spider mite infestations.

Field peppers

Trade name (active ingredient) Chemical group Labelled pests Notes
Acramite 50WS (bifenazate) Unknown Two-spotted spider mite Contact activity. Good coverage of foliage is important. Quick knockdown.
Oberon Flowable (spiromesifen) Group 23 Broad mite, two-spotted spider mite Contact activity. Translaminar movement, but thorough coverage of foliage is important. An adjuvant may be used to improve coverage and control. Also effective against eggs.

Field eggplant

Trade name (active ingredient) Chemical group Labelled pests Notes
Acramite 50WS (bifenazate) Unknown Two-spotted spider mite Contact activity. Thorough coverage of foliage is important. Quick knockdown.
Kanemite 15 SC (acequinocyl) Group 20B Two-spotted spider mite Quick knockdown. Thorough coverage of foliage is important.
Oberon Flowable (spiromesifen) Group 23 Broad mite, two-spotted spider mite Contact activity. Translaminar movement, but thorough coverage of foliage is important. An adjuvant may be used to improve coverage and control. Also effective against eggs.
Malathion 85E (malathion) Group 1B Two-spotted spider mite Registered, but not considered effective. Use of organophosphate insecticides can worsen two-spotted spider mite infestations.

Remember to always rotate between chemical groups in order to manage resistance.

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