How to Manage Pests

UC Pest Management Guidelines


Relative Toxicities Of Insecticides And Miticides Used In Peppermint To Natural Enemies And Honey Bees

(Reviewed 8/12, updated 8/12, corrected 10/16)

In this Guideline:

Common name
(trade name and formulation)
Mode of action1 Selectivity2
(affected groups)
Predatory mites3 General predators4 Parasites4 Honey bees5 Duration of impact to natural enemies6
Abamectin (Agri-Mek EC) 6 moderate (mites, leafminers) H L M/H I long to predatory mites and affected insects
Bifenazate (Acramite) un narrow (mites) L L L II short
Chlorantraniliprole (Coragen) 28 narrow L L L/M III short
Chlorpyrifos (Lorsban Advanced) 1B broad (insects, mites) M H H I moderate
Ethoprop (Mocap 15G) 1B narrow (soil insects) L L L II
Etoxazole (Zeal) 10B narrow (mites) 7 II short
Fenpyroximate (Fujimate) 21A narrow (mites and some insects) L L III short
Hexythiazox (Onager EC) 10A narrow (mites) M L L II short to moderate
Neem oil (Trilogy) un broad (soft-bodied) insects) L L L II short
Propargite (Omite) 12C narrow (pest mites) M8 L L III short
H = high    M = moderate     L = low     — = no information     un = unknown or uncertain mode of action
1 Rotate chemicals with a different mode-of-action Group number, and do not use products with the same mode-of-action Group number more than twice per season to help prevent the development of resistance. For example, the organophosphates have a Group number of 1B; chemicals with a 1B Group number should be alternated with chemicals that have a Group number other than 1B. Mode-of-action Group numbers are assigned by IRAC (Insecticide Resistance Action Committee). For additional information, see their Web site at
2 Selectivity: Broad means it affects most groups of insects and mites; narrow means it affects only a few specific groups.
3 Generally, toxicities are to western predatory mite, Galendromus occidentalis. Where differences have been measured in toxicity of the pesticide-resistant strain versus the native strain, these are listed as pesticide-resistant strain/native strain.
4 Toxicities are averages of reported effects and should be used only as a general guide. Actual toxicity of a specific chemical depends on the species of predator or parasite, environmental conditions, and application rate.
5 Ratings are as follows: I—Do not apply or allow to drift to plants that are flowering; II—Do not apply or allow to drift to plants that are flowering, except when the application is made between sunset and midnight if allowed by the pesticide label and regulations; III—No bee precaution, except when required by the pesticide label or regulations. For more information about pesticide synergistic effects, see Bee Precaution Pesticide Ratings.
6 Duration: Short means hours to days; moderate means days to 2 weeks; and long means many weeks or months.
7 Acute toxicity low, but reproductive capacity impacted.
8 Use lowest rates for best management of western predatory mite/spider mite ratio (propargite).



[UC Peer Reviewed]

UC IPM Pest Management Guidelines: Peppermint
UC ANR Publication 3457

General Information

Acknowledgements: This table was compiled based on research data and experience of University of California scientists who work on a variety of crops and contribute to the Pest Management Guideline database, and from Flint, M. L. and S. H. Dreistadt. 1998. Natural Enemies Handbook: An Illustrated Guide to Biological Pest Control, ANR Publication 3386.

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