Malheur Experiment Station Information for Sustainable Agriculture

BETAMIX^®, PROGRESS^®, AND BETANEX^® FORMULATIONS FOR WEED CONTROL IN SUGAR BEETS

Corey V. Ransom, Charles A. Rice, and Joey K. Ishida

Malheur Experiment Station

Oregon State University

Ontario, OR, 2001

Introduction

Pressure from the U.S. Environmental Protection Agency to remove one of the carriers from the current formulations of Betamix, Progress, and Betanex has lead Aventis to produce formulations of these products that use a plant-based oil as a carrier. These oil-based formulations need to be compared to current formulations to determine if sugar beet tolerance and weed control efficacy are similar.

Experimental oil-based formulations of Progress, Betamix, and Betanex were compared to commercial formulations for sugar beet tolerance and weed control efficacy.

Both the experimental and commercial formulations were applied alone at 4.0 oz ai/acre and in a micro-rate treatment at 1.28 oz ai/acre in combination with UpBeet (0.063 oz ai/acre), Stinger (0.5 oz ai/acre), and Scoil (methylated seed oil) (1.5 percent v/v). The experimental and commercial formulations were applied alone three times with the first application to cotyledon beets, the second to two-leaf beets, and the third to eight-leaf beets. The applications were made on April 25, May 3, and May 17. The micro-rate treatments were applied four times with the first application to cotyledon beets on April 25, two-leaf on May 3, four-leaf on May 8, and eight-leaf on May 17.

Sugar beet injury ranged from 14 to 32 percent on May 12 and did not differ between experimental oil-based formulations and commercial formulations of Progress, Betamix, or Betanex (Table 1). The experimental formulations also displayed similar injury compared to their respective commercial formulations when applied in a micro-rate with Upbeet, Stinger, and Scoil. Sugar beet injury was not significant after June 25.

In general, weed control was similar between the experimental oil-based and commercial formulations whether applied alone or in the micro-rate treatment (Table 2). The only differences were observed with common lambsquarters control evaluated on June 25. The commercial formulations of Progress and Betanex provided greater control of common lambsquarters than did their respective experimental oil-based formulations.

Sugar beet yields were similar with the experimental oil-based formulations compared to their respective commercial formulations (Table 1). Sugar beet root yields ranged from a low of 31 ton/acre with the experimental oil-based formulation of Progress applied alone to a high of 46 ton/acre with the micro-rate treatment containing the commercial Betanex formulation.

Table 1. Sugar beet injury and yield with experimental and commercial Progress, Betamix, and Betanex formulations, Malheur Experiment Station, Oregon State University, Ontario, OR, 2001.

			Injury				Sugar beet yield
Treatment	Rate	Timing*	5-12	5-24	6-4	6-25
	oz ai/acre	Leaf	--------------------------------%-------------------------------				ton/acre
New Progress New Progress New Progress	4.0 5.28 5.28	Cot 2-leaf 8-leaf	22	25	23	2	31
Progress Progress Progress	4.0 5.28 5.28	Cot 2-leaf 8-leaf	23	21	14	0	38
New Progress + UpBeet + Stinger + Scoil	1.28 + 0.063 + 0.5 + 1.5% v/v	Cot, 2, 4, 8-leaf	17	17	9	0	41
Progress + UpBeet +  Stinger + Scoil	1.28 + 1.0 + 0.5 + 1.5% v/v	Cot, 2, 4, 8-leaf	22	20	19	0	41
New Betamix New Betamix New Betamix	4.00 5.28 5.28	Cot 2-leaf 8-leaf	25	21	18	3	37
Betamix Betamix Betamix	4.0 5.28 5.28	Cot 2-leaf 8-leaf	30	23	20	0	35
New Betamix + UpBeet +  Stinger + Scoil	1.28 + 0.063 + 0.5 + 1.5% v/v	Cot, 2, 4, 8-leaf	17	18	17	0	40
Betamix + UpBeet +  Stinger + Scoil	1.28 + 0.063 + 0.5 + 1.5% v/v	Cot, 2, 4, 8-leaf	19	20	15	3	43
New Betanex New Betanex New Betanex	4.0 5.28 5.28	Cot 2-leaf 8-leaf	21	19	12	0	41
Betanex Betanex Betanex	4.0 5.28 5.28	Cot 2-leaf 8-leaf	14	17	15	5	43
New Betanex + UpBeet +  Stinger + Scoil	1.28 + 0.063 + 0.5 + 1.5% v/v	Cot, 2, 4, 8-leaf	24	22	19	3	45
Betanex + UpBeet +  Stinger + Scoil	1.28 + 0.063 + 0.5 + 1.5 % v/v	Cot, 2, 4, 8-leaf	32	24	20	0	46
Untreated	--	--	0	0	0	0	16
LSD (0.05)			11	10	10	NS	10

*Applications were made to cotyledon (Cot) sugar beets on April 25, two-leaf (2-leaf) May 3, four-leaf (4-leaf) May 8, and eight-leaf (8-leaf) on May 17.

Table 2. Weed control with experimental and commercial Progress, Betamix, and Betanex formulations, Malheur Experiment Station, Oregon State University, Ontario, OR, 2001.

			Weed control
			Redroot pigweed			Common lambsquarters			Hairy nightshade
Treatment	Rate	Timing*	6-4	6-25		6-4	6-25		6-4	6-25
	oz ai/acre	Leaf	------------------------------------------ % -----------------------------------------
New Progress New Progress New Progress	4.0 5.28 5.28	Cot 2-leaf 8-leaf	86	43		98	87		89	61
Progress Progress Progress	4.0 5.28 5.28	Cot 2-leaf 8-leaf	90	64		98	98		91	72
New Progress + UpBeet + Stinger + Scoil	1.28 + 0.063 + 0.5 + 1.5% v/v	Cot, 2, 4, 8-leaf	98	84		100	100		100	97
Progress + UpBeet +  Stinger + Scoil	1.28 + 1.0 + 0.5 + 1.5% v/v	Cot, 2, 4, 8-leaf	97	78		100	97		96	91
New Betamix New Betamix New Betamix	4.00 5.28 5.28	Cot 2-leaf 8-leaf	91	74		99	98		89	70
Betamix Betamix Betamix	4.0 5.28 5.28	Cot 2-leaf 8-leaf	94	74		100	95		87	65
New Betamix + UpBeet +  Stinger + Scoil	1.28 + 0.063 + 0.5 + 1.5% v/v	Cot, 2, 4, 8-leaf	96	83		100	100		97	92
Betamix + UpBeet +  Stinger + Scoil	1.28 + 0.063 + 0.5 + 1.5% v/v	Cot, 2, 4, 8-leaf	99	92		100	100		99	97
New Betanex New Betanex New Betanex	4.0 5.28 5.28	Cot 2-leaf 8-leaf	99	91		100	92		88	68
Betanex Betanex Betanex	4.0 5.28 5.28	Cot 2-leaf 8-leaf	99	95		99	100		91	77
New Betanex + UpBeet +  Stinger + Scoil	1.28 + 0.063 + 0.5 + 1.5% v/v	Cot, 2, 4, 8-leaf	99	97		98	100		99	98
Betanex + UpBeet +  Stinger + Scoil	1.28 + 0.063 + 0.5 + 1.5 % v/v	Cot, 2, 4, 8-leaf	99	97		99	100		99	100
Untreated	--	--	0	0		0	0		0	0
LSD (0.05)			7	25		2	7		12	29

*Applications were made to cotyledon (Cot) sugar beets on April 25, two-leaf (2-leaf) May 3, four-leaf (4-leaf) May 8, and eight-leaf (8-leaf) on May 17.

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Last updated  Tuesday July 30, 2002 .