UC IPM Online UC ANR home page UC IPM home page

UC IPM Home

Search

SKIP navigation
How to Manage Pests

Home & garden
Agriculture
Natural environments
Exotic & invasive

Weather data & products
Degree-days
Interactive tools & models

Educational Resources

Publications & more
Workshops and events
PCA exam helper
Pesticide information

Research and IPM

Grants programs
Funded-project results

 
  Printer-friendly version

How to Manage Pests

UC Pest Management Guidelines

| More pests | More crops | About guidelines |

Carrot

Relative Toxicities of Pesticides Used in Carrots to Natural Enemies and Honey Bees

(Reviewed 10/05, updated 10/05)

In this Guideline:

Common name (trade name) Chemical
class1		 Mode of action2 Selectivity3 (affected groups) Predatory mites4 General predators5 Parasites5 Honey bees6 Duration of impact to natural enemies7
carbaryl (Sevin) 4F, 80S
C
1A
 broad (insects, mites)
L/H
H
H
I
 long
carbaryl (Sevin) XLR Plus
C
1A
 broad (insects, mites)
L
H
L
III
 long
cyfluthrin (Baythroid)
P
3
 broad (insects, mites)
H
H
H
I
 moderate
diazinon–foliar
OP
1B
 broad (insects, mites)
L
H
H
I
 moderate to long
endosulfan (Thionex, Thiodan)
OC
2A
 broad (insects, mites)
L
M
M
II*
 short
esfenvalerate (Asana)
P
3
 broad (insects, mites)
H
M
H
I*
 moderate
imidacloprid (Admire)
N
4A
 narrow (sucking insects, beet armyworm, cutworms)
—
L
L
II
 —
imidacloprid (Provado)
N
4A
 narrow (sucking insects)
—
—
H
II
 short to moderate
insecticidal soap (M-Pede)
CON
—
 broad (exposed insects, mites)
M
M
M
IV
 short to none
malathion
OP
1B
 broad (insects, mites)
M
H
H
II
 moderate
methomyl (Lannate)
C
1A
 broad (insects, mites)
H
H
H
III
 moderate
spinosad (Entrust, Success)
M
5
 narrow (caterpillars, thrips, whiteflies, aphids, scales, leafminers)
L
M8
L/M
III
 short to moderate

H = high M = moderate L = low — = no information

1 Chemical class: C = carbamate; CON = contact including smothering and barrier effect; M = microbial; N = neonicotinoid; OC = organochlorine; OP = organophosphate; P = pyrethroid
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, 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.
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. If marked with an asterisk (*), the rating is the next higher rating for lower label rates. For more information, see How to Reduce Bee Poisoning From Pesticides, 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.
8 Toxic against some natural enemies (predatory thrips, syrphid fly larva) when sprayed and shortly after (8-24 hrs.).

[Precautions]

PUBLICATION

[UC Peer Reviewed]

UC IPM Pest Management Guidelines: Carrot
UC ANR Publication 3438
Relative Toxicities of Pesticides Used in Carrots to Natural Enemies and Honey Bees
Acknowledgments: This table was compiled based on research data and experience of University of California scientists working on a variety of crops.

Top of page

Statewide IPM Program, Agriculture and Natural Resources, University of California
All contents copyright © 2005 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 How to manage pests, or in the U.S., contact your local Cooperative Extension office for assistance. /PMG/r102900111.html revised: October 28, 2005. Contact webmaster.