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How to Manage Pests

UC Pest Management Guidelines

| More pests | More crops | About guidelines |

Peach

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

(Reviewed 3/06, updated 9/06)

In this Guideline:

Common name (trade name) Chemical class1 Mode of action2 Selectivity (affected groups)3 Predatory mites4 General predators5 Parasites5 Honey bees6 Duration of impact to natural enemies7
azadirachtin (Neemix) B, IGR 26 broad (insects, mites) M L-M L-M III short
Bacillus thuringiensis ssp. kurstaki M 11.B2 narrow (caterpillars) L L L IV none
bifenazate (Acramite) CE 25 narrow (spider mites) L L L IV short
buprofezin (Centaur) IGR 16 narrow (scales) L H8 L IV long
carbaryl (Sevin) 80S C 1A broad (insects, mites) L/H H H I long
carbaryl (Sevin) XLR Plus C 1A broad (insects, mites) M H M III long
clofentezine (Apollo) T 10A narrow (mites) L L L IV short
diazinon–foliar OP OP broad (insects, mites) L H H I moderate to long
diflubenzuron (Dimilin) IGR 15 — L H L IV —
endosulfan (Thionex) OC 2A broad (insects, mites) L M M III short
esfenvalerate (Asana) P 3 broad (insect, mites) H M H I moderate
fenbutatin oxide (Vendex) OT — narrow (pest mites) L L L IV short
formetanate hydrochloride (Carzol) C 1A broad (insects, mites) M/H H H III long, unless washed off
hexythiazox (Onager, Savey) — 10A narrow (mites) L L L IV short
imidacloprid (Provado) N 4A narrow (sucking insects) — — H II short to moderate
methomyl (Lannate) C 1A broad (insects, mites) H H H III moderate
methoxyfenozide (Intrepid) IGR 18 narrow (caterpillars) L L L IV none
neem oil (Trilogy) B — broad (soft-bodied insects) L L L III short
permethrin (Ambush, Pounce) P 3 broad (insects, mites) H H H I long
petroleum oil CON — broad (exposed insects, mites) L L L III short to none
phosmet (Imidan) OP 1B broad (insects, mites) H H H I moderate to long
pyridaben (Nexter, Pyramite) PY 21 broad (insects, mites) M/H M — III short
pyriproxyfen (Esteem, Seize) IGR 7C narrow (scale, beetles) L H8 L IV long
spinosad (Entrust, Success) M 5 caterpillars, thrips, whiteflies, aphids, scales, leafminers L M9 M/H III short
sulfur I — narrow (mites) L/H L H IV short
H = high M = moderate L = low — = no information
1  Chemical class: B = botanical; C = carbamate; CE = carboxylic acid ester; CON = contact including smothering and barrier effect; I = inorganic; IGR = insect growth regulator; M = microbial; N = neonicotinoid; OC = organochlorine; OP = organophosphate; OT = organotin; P = pyrethroid; PY = pyridazinone; T = tetrazine
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 the native strain of the 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 low 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 Kills lady beetles.
9 Toxic against some natural enemies (predatory thrips, syrphid fly larva, beetles) when sprayed and shortly after (8-24 hrs).

[Precautions]

PUBLICATION

[UC Peer Reviewed]

UC IPM Pest Management Guidelines: Peach
UC ANR Publication 3454
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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