How to Manage Pests

UC Pest Management Guidelines

Cole Crops

Relative Toxicities of Insecticides and Miticides Used in Cole Crops to Natural Enemies and Honey Bees

(Reviewed 6/07, updated 10/10, corrected 10/16)

In this Guideline:


Common name (Example trade name) Mode of action1 Selectivity2 (Affected groups) Predatory mites3 General predators4 Parasites4 Honey bees5 Duration of impact to natural enemies6
acephate (Orthene S) 1B broad (insects) H H M/H I moderate
acetamiprid (Assail WP) 4A moderate (sucking insects, larvae) 7 8 II moderate
Bacillus thuringiensis ssp. aizawai 11A narrow (caterpillars) L L L II short
Bacillus thuringiensis ssp. kurstaki 11A narrow (caterpillars) L L L III short
bifenthrin (Brigade EC) 3A broad (insects) H H H I long
carbaryl (Sevin bait) 1A narrow (cutworms, armyworms) L L L III short
carbaryl (Sevin F, S) 1A broad (insects) M/H H H I long
carbaryl (Sevin XLR Plus) 1A broad (insects) L H L I long
chlorantraniliprole (Coragen) 28 narrow (primarily caterpillars) III
chlorpyrifos (Lorsban Advanced) 1B broad (insects) M H H I moderate
cryolite (Kryocide W) un narrow (foliage chewing insects) L L L III short
cyromazine (Trigard WP) 17 narrow (leafminers) L L L II short
diazinon (EC, WP) 1B broad (insects) L H H I moderate to long
diazinon (granular) 1B narrow (soil insects) L L L III short
emamectin benzoate (Proclaim) 6 narrow (caterpillars) I
esfenvalerate (Asana) 3A broad (insects) H M H I moderate
ethoprop (Mocap G) 1B narrow (soil insects) L L L II
ethoprop (Mocap EC) 1B II
flonicamid (Beleaf) 9C narrow (plant bugs, aphids) L L L III short
imidacloprid (Admire Pro) 4A narrow (sucking insects, beet armyworm, cutworms) L I
imidacloprid (Provado F) 4A narrow (sucking insects) H I short to moderate
indoxacarb (Avaunt) 22A narrow (caterpillars) I
insecticidal soap (M-Pede) un broad (insects) M M M III short to none
methomyl (Lannate SP, LV) 1A broad (insects) H H H I moderate
methoxyfenozide (Intrepid F) 18 narrow (caterpillars) L L L II short
petroleum oil un broad (exposed insects) L L L II short to none
pymetrozine (Fulfill) 9B narrow (aphids, whiteflies) II
spinetoram (Radiant) 5 narrow (caterpillars, whiteflies,

aphids, leafminers)

L/H M9 L/M II moderate10
spinosad (Entrust, Success) 5 narrow (caterpillars, whiteflies, aphids, leafminers) L M9 L/M II short to moderate9
spiromesifen (Oberon SC) 23 narrow (whiteflies) II
spirotetramat (Movento) 23 narrow (aphids, whiteflies) II
thiamethoxam (Actara) 4A narrow (sucking insects) 11 M I moderate
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 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 http://www.irac-online.org/.
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 May cause flare-ups of spider mite populations.
8 Acute toxicity low but reproductive capacity is impacted.
9 Toxic against some natural enemies (predatory thrips, syrphid fly and lacewing larvae, beetles) when sprayed and up to 5-7 days after, especially for syrphid fly larvae.
10 Residual is moderate if solution is between pH of 7 to 8.
11 May cause increase in spider mite populations.

[Precautions]

PUBLICATION

[UC Peer Reviewed]

UC IPM Pest Management Guidelines: Cole Crops
UC ANR Publication 3442

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.

Top of page


Statewide IPM Program, Agriculture and Natural Resources, University of California
All contents copyright © 2017 The Regents of the University of California. All rights reserved.

For noncommercial purposes only, any Web site may link directly to this page. FOR ALL OTHER USES or more information, read Legal Notices. Unfortunately, we cannot provide individual solutions to specific pest problems. See our Home page, or in the U.S., contact your local Cooperative Extension office for assistance.

Agriculture and Natural Resources, University of California

Accessibility   /PMG/r108900111.html revised: January 19, 2017. Contact webmaster.