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How to Manage Pests

UC Pest Management Guidelines

| More pests | More crops | About guidelines |

Bermudagrass Seed Production

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

(Reviewed 1/07, updated 1/07)

In this Guideline:

Common name (trade name) Chemical Class 1 Mode of Action 2 Selectivity 3 (affected groups) Predatory mites 4 General predators 5 Parasites 5 Honey bees 6 Duration of impact to natural enemies 7
acephate (Orthene)
OP
1B
 broad (insects, mites)
H
H
M/H
I
 intermediate
Bacillus thuringiensis ssp. kurstaki
M
11.B2
 narrow (caterpillars)
L
L
L
IV
 none
sulfur
I
—
 narrow (mites and citrus thrips)
L/H
M/L
H
IV
 short
H = high M = moderate L = low — = no information
1 Chemical class: I = inorganic; M = microbial; OP = organophosphate.
2 Modes of action are important in preventing the development of resistance to pesticides. 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. 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 is assigned by IRAC (Insecticide Resistance Action Committee). For additional information, see their Web site at http://www.irac-online.org/.
3 Selectivity: Broad means it affects most groups of insects and mites; narrow means it affects only a few specific groups.
4 Generally, toxicites are to western predatory mite, Galendromus occidentalis. Where differences have been measured, these are listed as pesticide-resistant strain/native strain.
5 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.
6 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 (164KB, PDF), Pacific Northwest Extension Publication PNW518.
7 Duration: Short means hours to days; moderate means days to 2 weeks; and long means many weeks or months.

 

[Precautions]

PUBLICATION

[UC Peer Reviewed]

UC IPM Pest Management Guidelines: Bermudagrass Seed Production
UC ANR Publication 3472
General Information
Acknowledgments: This table was compiled based on research data and experience of University of California scientists working on a variety of crops.

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Statewide IPM Program, Agriculture and Natural Resources, University of California
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