How to Manage Pests

UC Pest Management Guidelines


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

(Reviewed 11/09 , updated 9/15)

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
acetamiprid (Assail) 4A moderate (sucking insects, larvae) 7 III moderate
Bacillus thuringiensis ssp. kurstaki 11A narrow (caterpillars) L L L IV none
bifenazate (Acramite) un narrow (spider mites) L L L III short
carbaryl (Sevin 4F) 1A broad (insects, mites) M/H H H I15 long
carbaryl (Sevin XLR Plus) 1A broad (insects, mites) L H L III long
chlorantraniliprole (Altacor) 28 narrow (primarily caterpillars) L L L/M IV short
chlorpyrifos (Lorsban) 1B broad (insects, mites) M H H I moderate
clofentezine (Apollo) 10A narrow (mites) L L L IV short
diazinon 1B broad (insects, mites) L H H I moderate to long
esfenvalerate (Asana) 3A broad (insect, mites) H M H I moderate
etoxazole (Zeal) 10B narrow (mites) H8 L IV short
flubendiamide (Belt) 28 L L L/M I short
hexythiazox (Onager) 10A narrow (mites) M L L IV short to moderate
imidacloprid (Admire Pro) 4A narrow (sucking insects) M M H II short to moderate
lambda-cyhalothrin (Warrior) 3A broad (beetles, caterpillars) H H H I9 moderate
methoxyfenozide (Intrepid) 18 narrow (caterpillars) L L L IV none
petroleum oil broad (exposed insects, mites) L L L III short to none
propargite (Omite) 14 narrow (pest mites) M10 L L IV short
pyriproxyfen (Seize) 7C narrow (scale, beetles) L H11 L IV long
spinetoram (Delegate) 5 narrow (caterpillars, aphids, scales) M M12 L/M III moderate13
spinosad (Entrust, Success) 5 narrow(caterpillars, aphids, scales) M M12 L/M III short
spirodiclofen (Envidor) 23 narrow (mites) L I
thiamethoxam (Actara) 4A narrow (sucking insects) 14 M I moderate
H = high    M = moderate    L = low     — = no information
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 ("un" = unknown or uncertain mode of action) 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, 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 to blooming plants; II-Apply only during late evening; III-Apply only during late evening, night, or early morning; and IV-Apply at any time with reasonable safety to bees. For more information, see How to Reduce Bee Poisoning From Pesticides (PDF), Pacific Northwest Extension Publication PNW591.
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 Does not kill adults but sterilizes females.
9 If rate is 0.02 lb a.i./acre, rating is II.
10 Use lowest rates for best management of western predatory mite/spider mite ratio.
11 Kills lady beetles.
12 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.
13 Residual is moderate if solution is between pH of 7 to 8.
14 May cause an increase in spider mite populations.
15 If rate is 1 lb a.i./acre or less, rating is II.



[UC Peer Reviewed]

UC IPM Pest Management Guidelines: Cherry
UC ANR Publication 3440

General Information

Acknowledgements: 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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