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Beggarticks, Nodding (Bidens cernua L.)

Author: Mike Cowbrough - Weed Management (Field Crops) Program Lead/OMAF
Creation Date: 24 January 2005
Last Reviewed: 24 January 2005

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Table of Contents

  1. History
  2. Life Cycle
  3. Distinguishing Characteristics
  4. Control in Corn
  5. Control in Soybeans
  6. Control in Winter Wheat

History

Nodding beggarticks occurs throughout Ontario in moist places, usually in meadows, river valleys, roadside ditches and depressions in cultivated land.

Life Cycle

Annual reproducing only by seed.

Distinguishing Characteristics

It is distinguished by its opposite undivided leaves, its large flower heads with 8 yellow florets and long, green whorls of small leaves (bracts) located immediately undeneath the flowers The seeds also distinguish this species as they contain two downward-barbed awns. For more information, refer to Page 212 in OMAF Publication 505 - Ontario Weeds.

Nodding Beggarticks Pictures
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Herbicide Control in Field Corn

No information exists at this time.

What has been your experience?

We want your feedback. Let us know what you have experienced with these or other products, as well as any other effective management strategies.

Herbicide Control in Soybeans

Pre-Emergent Control:

A pre-plant application of glyphosate should be effective at providing control of emerged seedlings. However glyphosate has no residual activity and therefore season long control may only be achieved if the soybean crop canopies quickly. Alternatively, season long control can be attained by applying an effective residual soil applied herbicides (Table 1).

Table 1. Visual control of Nodding beggarticks following pre-plant (PP) applications of various herbicides.
Active Ingredient Trade Name (application timing)
% Control
cloransulam-methyl FIRSTRATE (PRE)
99
flumetsulam/s-metolachlor/benoxacor BROADSTRIKE DUAL MAGNUM
98
linuron LOROX
94
imazethapyr PURSUIT
88
metribuzin SENCOR
80
s-metolachlor/benoxacor DUAL II MAGNUM
32

Post Emergent Control:

A number of post-emergenet herbicides will provide effective control of Nodding beggarticks in soybean (Table 2).

Table 2. Visual control of Nodding beggarticks using post-emergent products in conventional soybeans.
Active Ingredient Trade Name
% Control
chlorimuron-ethyl CLASSIC
99
cloransulam-methyl FIRSTRATE
99
imazethapyr + bentazon CLEANSWEEP
94
imazethapyr PURSUIT
94
bentazon BASAGRAN FORTE
94
thifensulfuron-methyl PINNACLE
84
glyphosate Numerous Products Exist (1 L/ac)
80
fomesafen RELFEX
46
aciflurofen CLEANSWEEP
41

Source:
Dr. Peter Sikkema, Ridgetown College, University of Guelph.

Number of Trials:

Tables 1 and 2 are based on a summary of 2 field trials.

Herbicide Rates:
Rates used in this trial are listed in OMAF Publication 75 - Guide to Weed Control.

Weed Stage:
Nodding beggarticks had not yet emerged with the pre-emergent treatments in Table 1. Nodding beggarticks was at the 4-8 leaf stage at the time of post-emergent applications (Table 2).

What has been your experience?
We want your feedback. Let us know what you have experienced with these or other products, as well as any other effective management strategies.

Herbicide Control in Winter Wheat

No information exists at this time.

What has been your experience?
We want your feedback. Let us know what you have experienced with these or other products, as well as any other effective management strategies.

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