Purple Moonflower Control with

1
Purple Moonflower Control with Postemergence
Herbicides Eric P. Prostko and Daniel S.
Price Associate Professor/Extension Weed
Specialist and Crisp County Extension Agent The
University of Georgia
INTRODUCTION Purple moonflower (Ipomoea
turbinata) is becoming common in many
agricultural fields in Georgia. Because this
weed has typically not been a major problem,
growers are unfamiliar with its identification
and control. Unfortunately, limited information
on the control of this weed is available.
Therefore, the objective of this research was to
evaluate numerous postemergence herbicides for
the control of purple moonflower in the
greenhouse.
RESULTS AND DISCUSSION Results are presented in
Figures 1 and 2. The following treatments
provided 90 visual control and biomass
reduction Reflex (3) Cobra (4) Ultra Blazer
(5) Callisto (6) Atrazine (8) Aim (12) 2,4-D
amine (13) Evik (19) Roundup P-Max Aim (21)
Roundup P-Max Valor (22) Direx MSMA (23)
Direx MSMA Aim (24) Direx MSMA Valor
(25). The following treatments provided 80-89
visual weed control and biomass reduction
Ignite (10) 2,4-DB (14) Roundup P-Max Staple
(20) and Gramoxone Inteon (26). Treatments that
provided 70-79 visual control and biomass
reduction included Laudis (7) and Cadre (9). All
other treatments provided less than 70 visual
control and biomass reduction.
MATERIALS AND METHODS Purple moonflower seed
were collected in the fall of 2008 from a
commercial corn field in Crisp County. The seed
were air dried at room temperature for 40 days.
Prior to planting in the greenhouse, the seed
were mechanically scarified with sandpaper to
improve germination. Five seeds were planted
into Styrofoam cups or plastic pots filled with
Miracle-Gro potting mix. After emergence, the
pots were thinned to contain 1 moonflower plant.
Once the plants reached the 2 leaf stage (3-6
tall), 26 herbicide treatments were applied using
a spray chamber calibrated to deliver 15 GPA
using 8002XR nozzle tips. Each treatment was
replicated 3 times and the experiment was
repeated. Visual weed control ratings (0-100)
and above-ground fresh weight biomass data were
collected 10 days after treatment. The data for
each experiment were combined and means were
separated using Fischers Protected LSD Test (P
0.10).

1. NTC
2. Strongarm _at_ 0.45 oz/A NIS
3. Reflex _at_ 16 oz/A NIS
4. Cobra _at_ 12.5 oz/A COC
5. Ultra Blazer _at_ 16 oz/A NIS
6. Callisto _at_ 3 oz/A COC 28 UAN
7. Laudis _at_ 3 oz/A COC 28 UAN
8. Atrazine _at_ 48 oz/A COC
9. Cadre _at_ 4 oz/A COC
10. Ignite _at_ 22 oz/A
11. Linex _at_ 24 oz/A NIS
12. Aim _at_ 1.5 oz/A COC
13. 2,4-D amine _at_ 16 oz/A
14. 2,4-DB _at_ 18 oz/A COC
15. Status _at_ 5 oz/A NIS

• Roundup PowerMax _at_ 22 oz/A
• Staple LX _at_ 2.7 oz/A NIS
• Envoke _at_ 0.1 oz/A NIS
• Evik _at_ 2 lb/A NIS
• Roundup P-Max _at_ 22 oz/A Staple LX _at_ 2.7 oz/A
• Roundup P-Max _at_ 22 oz/A Aim _at_ 1.5 oz/A
• Roundup P-Max _at_ 22 oz/A Valor _at_ 2 oz/A
• Direx _at_ 32 oz/A MSMA _at_ 40 oz/A NIS
• Direx _at_ 32 oz/A MSMA _at_ 40 oz/A Aim _at_ 1 oz/A
  NIS
• Direx _at_ 32 oz/A MSMA _at_ 40 oz/A Valor _at_ 1
  oz/A NIS
• Gramoxone Inteon _at_ 32 oz/A NIS

NIS _at_ 0.25 v/v (Induce) COC _at_ 1 v/v (Agridex)