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How to Manage Pests

UC Pest Management Guidelines

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Citrus

Mandatory Intervals Between Application, Reentry, and Harvest, and Hazards to Bees

(Reviewed 9/08, updated 1/11)

In this Guideline:
Common name Trade name and formulation Restricted entry interval1 (hours) Preharvest interval1 (days) Mode of Action Group Number2 Hazards to bees3
abamectin* Agri-Mek, etc. 12 7 6 II
Clinch bait 12 0 6 IV
acequinocyl Kanemite 12 7 20B IV
acetamiprid Assail 70WP 12 7 4A III
azadirachtin Neemix 12 0 un III
Bacillus thuringiensis ssp. aizawai# various 4 0 11 IV
Bacillus thuringiensis ssp. kurstaki# various 4 0 11 IV
bifenazate Acramite 12 1 year un III
buprofezin Applaud 70W 12 60 16 IV
carbaryl* Sevin 80S 12 5 1A I
Sevin XLR Plus 12 5 1A III
chlorantraniliprole Altacor 4 1 28 IV
chlorpyrifos* Lorsban 4EC 5 days 21, 28, or 35 4 1B I
cryolite Kryocide 96WP, Prokil Cryolite 96 12 15 un IV
cyfluthrin* Baythroid 2E 12 0 3A I
dicofol Dicofol 4E, etc 12 7 un IV
diflubenzuron Micromite 12 21 15 IV
dimethoate Dimethoate 400 and 2.67 48 15 or 45 1B I
fenpropathrin* Danitol 2.4EC 24 1 3A I
fenbutatin oxide* Vendex 50WP 48 7 12B IV
formetanate hydrochloride Carzol SP 10–16 days 5 30 1A III
fenpyroximate Fujimite 12 14 21A IV
hexythiazox Onager 12 28 10A IV
imidacloprid (soil application) Admire Pro, Nuprid 12 0 4A I 6
imidacloprid (foliar application) Provado 1.6F 12 0 4A I
iron phosphate Sluggo 0 0 — IV
malathion Malathion 8E 12 7 1B II
metaldehyde various 12 0 — IV
methidathion* Supracide 25WP 30 days 7 14 or 60 8 1B I
methomyl* Lannate LV 3 days 1 1A III
methoxyfenozide Intrepid 4 NA 18 IV
micronized sulfur Thiolux 24 0 — IV
naled Dibrom 8E 2–3 days 9 7 1B I
oil 415, 440 4 when dry 10 — III
phosmet Imidan 70W 3 days 7 1B I
propargite Omite CR 42 days 28 12C IV
pyrethrin/piperonyl butoxide Pyrenone Crop Spray 12 when dry 3A/— III
pyrethrin/rotenone Pyrellin E.C. 12 0 3A/21B III
pyriproxyfen Esteem 0.86EC, Esteem Ant Bait 12 1 7C IV
pyridaben Nexter 12 7 21A III
sabadilla Veratran D 0.2% 24 when dry — IV
spinetoram Delegate WG 4 1 5 III 11
spinosad Success 2SC, Entrust 80WP# 4 1 5 III 11
spirodiclofen Envidor 2SC 12 7 23 I
spirotetramat Movento 24 1 23 —
thiamethoxam Platinum 12 0 4A I
wettable sulfur# various 24 0 — IV
zeta-cypermethrin Mustang 12 3 3A I
— Information not available
* Permit required from county agricultural commissioner for purchase or use.
# Acceptable for use on organically grown produce.
NA Not applicable; for use on nonbearing trees only.
1 Restricted entry interval (R.E.I.) is the number of hours (unless otherwise noted) from treatment until the treated area can be safely entered without protective clothing. Preharvest interval (P.H.I.) is the number of days from treatment until the orchard can be harvested. In some cases the R.E.I. exceeds the P.H.I.; the longer of these two intervals is the minimum time that must elapse before harvest may take place.
2 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 are assigned by IRAC (Insecticide Resistance Action Committee). For additional information, see their Web site at http://www.irac-online.org/.
3 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 (164 KB, PDF), Pacific Northwest Extension Publication PNW591.
4 Preharvest interval is 21 days for up to 7 pt/acre or 35 days for over 7 pt/acre and 28 days for ant control.
5 10 days for weeding and propping; 16 days for harvesting, thinning, topping, and pruning.
6 Do not apply during bloom because bees may be drawn to irrigation water.
7 Restricted entry interval is 40 days for low-volume sprays as authorized under a Special Local Needs permit.
8 Preharvest interval is 14 days when applied without oil and 60 days when applied with oil.
9 2 days for 1 pt or less; 3 days for more than 1 pt.
10 Special hazards are associated with oil treatments on green lemons; check label for preharvest interval.
11 Safe to bees 2 hrs after application has dried.

[Precautions]

PUBLICATION

[UC Peer Reviewed]

UC IPM Pest Management Guidelines: Citrus
UC ANR Publication 3441
General Pesticide 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.

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