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UC Pest Management Guidelines


Hairy nightshade berries.

Dry Beans

Herbicide Treatment Table

(Reviewed 8/07, updated 12/08)

In this Guideline: More about weeds in dry beans:

Herbicide common name Amount/Acre R.E.I.+ P.H.I.+
(trade name)   (hours) (days)

  Calculate impact of pesticide on air quality
When choosing an herbicide, consider information relating to environmental quality. Not all registered pesticides are listed. Always read label of product being used.
 
PREPLANT
Before weeds emerge
A. METOLACHLOR 0.9525–1.905 lb a.i. 24 0
  (Dual Magnum) 1–2 pt    
  WSSA MODE OF ACTION GROUP NUMBER1: 15
  COMMENTS: Preplant incorporate uniformly and thoroughly 2–4 inches deep. Avoid deep planting in cold, wet soil. Do not cut for hay within 120 days.
 
B. PENDIMETHALIN 0.7125–1.425 lb a.i. 24 0
  (Prowl) H2O 1.5–3 pt    
  WSSA MODE OF ACTION GROUP NUMBER1: 3
  COMMENTS: Preplant incorporate within 7 days after application. Don't use on peat or muck soils.
 
C. EPTC 3.0625 lb a.i. 12 0
  (Eptam) 7E 3.5 pt    
  WSSA MODE OF ACTION GROUP NUMBER1: 8
  COMMENTS: Preplant incorporate. Use lower rate in coarse, sandy soil. Do not use on Adzuki beans, cowpeas, soybeans, limas, Mung beans, garbanzos, or other flat-podded beans, except Romanos.
 
D. ETHALFLURALIN 0.56–1.125 lb a.i. 24 0
  (Sonalan) 1.5–3 pt    
  WSSA MODE OF ACTION GROUP NUMBER1: 3
  COMMENTS: Preplant incorporate to 2–3 inches. Injury may occur at high rates in deep plantings and in cold, wet, or sandy soil.
 
E. TRIFLURALIN 0.5–1 lb a.i. 12 0
  (Treflan, Trilin) 1–2 pt    
  WSSA MODE OF ACTION GROUP NUMBER1: 3
  COMMENTS: Preplant incorporate within 24 hours after application.
 
After weeds emerge
A. GLYPHOSATE
  (Roundup) Label rates see label see label
  WSSA MODE OF ACTION GROUP NUMBER1: 9
 
B. 2,4-D* Label rates see label see label
  (various products)
  WSSA MODE OF ACTION GROUP NUMBER1: 4
 
Herbicide combinations
A. METOLACHLOR 0.925–1.905 lb a.i. 24 0
  (Dual Magnum) 1–2 pt    
  WSSA MODE OF ACTION GROUP NUMBER1: 15
  . . . PLUS . . .
  TRIFLURALIN 0.5–1 lb a.i. 12 0
  (Treflan, Trilin) 1–2 pt    
  WSSA MODE OF ACTION GROUP NUMBER1: 3
  COMMENTS: Preplant incorporated. Common and lima beans.
  . . . or . . .
  PENDIMETHALIN 0.7125–1.425 lb a.i. 24 0
  (Prowl) H2O 1.53–3 pt    
  WSSA MODE OF ACTION GROUP NUMBER1: 3
  COMMENTS: For tank mixes, observe directions for use on all labels, and employ the most restrictive limits and precautions.
 
B. ETHALFLURALIN 0.465–1.6875 lb a.i. 24 0
  (Sonalan) 1.24–4.5 pt    
  WSSA MODE OF ACTION GROUP NUMBER1: 3
  . . . PLUS . . .
  METOLACHLOR 1.905 lb a.i. 24 0
  (Dual Magnum) 2 pt    
  WSSA MODE OF ACTION GROUP NUMBER1: 15
  COMMENTS: Preplant incorporated. Common beans. Higher rates of ethalfluralin for groundcherry and nightshade control only. For tank mixes, observe directions for use on all labels, and employ the most restrictive limits and precautions.
 
C. EPTC 2.1875–3.0625 lb a.i. 12 0
  (Eptam) 7E 2.5–3.5 pt    
  WSSA MODE OF ACTION GROUP NUMBER1: 8
  . . . PLUS . . .
  TRIFLURALIN 0.5–1 lb a.i. 12 0
  (Treflan, Trilin) 1–2 pt    
  WSSA MODE OF ACTION GROUP NUMBER1: 3
  COMMENTS: Preplant incorporated. Common beans. For tank mixes, observe directions for use on all labels, and employ the most restrictive limits and precautions.
 
D. PENDIMETHALIN 0.7125–1.425 lb a.i. 24 0
  (Prowl) H2O 1.5–3 pt    
  WSSA MODE OF ACTION GROUP NUMBER1: 3
  . . . PLUS . . .
  EPTC   12 0
  (Eptam) 7E Label rates    
  WSSA MODE OF ACTION GROUP NUMBER1: 8
  COMMENTS: Preplant incorporated. Common and lima beans. For tank mixes, observe directions for use on all labels, and employ the most restrictive limits and precautions.
 
E. ETHALFLURALIN 0.465–1.6875 lb a.i. 24 0
  (Sonalan) 1.25–4.5 pt    
  WSSA MODE OF ACTION GROUP NUMBER1: 3
  . . . PLUS . . .
  EPTC 3.0625 lb a.i. 12 0
  (Eptam) 7E 3.5 pt    
  WSSA MODE OF ACTION GROUP NUMBER1: 8
  COMMENTS: Preplant incorporated. Common beans. Higher rates of ethalfluralin for groundcherry and nightshade control only. For tank mixes, observe directions for use on all labels, and employ the most restrictive limits and precautions.
 
POSTPLANT
After weeds emerge
A. BENTAZON
  (Basagran) Label rates 48 30
  WSSA MODE OF ACTION GROUP NUMBER1: 6
  COMMENTS: Can be used only in beans that are sprinkler irrigated. Apply to broadleaf weeds when they are small (see label) and actively growing after the first trifoliate leaf on the bean crop has expanded. Do not cultivate 5 days before or 7 days after application. Not labeled for cowpeas (blackeyes) and not recommended for adzuki beans.
 
B. SETHOXYDIM
  (Poast) Label rates 12 30
  WSSA MODE OF ACTION GROUP NUMBER1: 1
  COMMENTS: Systemic grass herbicide that provides good control of volunteer cereals, especially if beans have followed a grain crop.
 
C. CLETHODIM
  (Select Max) Label rates 24 30
  WSSA MODE OF ACTION GROUP NUMBER1: 1
  COMMENTS: Systemic herbicide that is safe to beans and controls grass weeds. Must be used with an oil concentrate.
 
PREHARVEST
A. CARFENTRAZONE
  (Shark) 1–2 fl oz 12 0
  WSSA MODE OF ACTION GROUP NUMBER1: 14
  COMMENTS: Good coverage is essential for best results. An adjuvant of NIS, COC, or MSO is required.
 
+ 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 to harvest. In some cases the REI exceeds the PHI. The longer of two intervals is the minimum time that must elapse before harvest.
* Permit required from county agricultural commissioner for purchase or use.
1 Group numbers are assigned by the Weed Science Society of America (WSSA) according to different modes of action. Although weeds may exhibit multiple resistance across many groups, mode of action numbers are useful in planning mixtures or rotations of herbicides with different modes of action. For more information, see http://www.hracglobal.com.

[Precautions]

PUBLICATION

[UC Peer Reviewed]

UC IPM Pest Management Guidelines: Dry Beans
UC ANR Publication 3446
Weeds
W. M. Canevari, UC Cooperative Extension, San Joaquin County
Acknowledgment for contributions to Weeds:
C. A. Frate, UC Cooperative Extension, Tulare County

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