PLANTING DELAY AFTER USE OF BURNDOWN HERBICIDES

 

A common practice in conservation-till systems is use of ‘burndown’ herbicides for preplant weed control. Remember that time restrictions with crop planting after herbicide application may exist. The following are examples of label restrictions for several preplant burndown herbicides:

 

*Landmaster BW - “Do not plant any crop other than wheat, barley, corn, oat, rye, or sorghum (grain or forage) for 3 months after treatment or until this product has disappeared from the soil”.

*Fallow Master BroadSpectrum - “Delay planting of wheat, barley, oat, or sorghum (grain or forage) for 15 days after applications of this product. Do not plant any crop other than corn, wheat, barley, oat, rye, or sorghum (grain or forage) for 3 months after application or until this product has disappeared from the soil”.

*Aim - Corn, grain sorghum, wheat, barley, oat, buckwheat, pearl millet, and proso millet may be planted any time following an application of Aim. All other crops may be planted after 30 days following an application of Aim. Follow rotation restrictions on tank mix products if they are more restrictive.

*2,4-D (4 lb/gal concentrate) burndown for soybean - Days before seeding: 0.75-1 pint/A ester = 7 or more, 0.75-1 pint/A amine = 15 or more, 1-2 pint/A ester or amine = 30 or more. Seed soybean at least 1.5 to 2 inches deep to ensure separation from the herbicide.

 

Always read and follow herbicide label directions.

 

ANNUAL COOL-SEASON HAY CROP PERFORMANCE

As a reference for selecting cool-season, annual forage crops for hay production, the following are average yield and quality factors from 1999-2000 NDSU Carrington Research Extension Center trials:

 

Forage cultivar(s)

Forage species

Yield (15% moisture)

Crude

protein

TDN

Relative Feed Value

tons/acre

%

Mammoth

oat

3.7

10.7

49.0

80

Whitestone

oat

3.5

11.4

47.6

79

Paul

naked oat

3.0

12.3

50.3

86

Trapper

pea

2.0

25.9

59.2

150

Arvika

forage pea

2.5

19.9

56.9

125

Whitestone+Trapper

oat+pea

3.7

15.5

53.2

104

Whitestone+Arvika

oat+pea

3.4

15.5

52.9

99

Paul+Trapper

oat+pea

2.8

17.1

54.7

101

Paul+Arvika

oat+pea

3.3

16.0

53.1

100

Haybet

awnless barley

3.3

12.5

52.7

94

Robust

barley

2.3

14.6

55.3

95

Robust+Trapper

barley+pea

2.2

17.2

57.6

111

Robust+Arvika

barley+pea

2.3

16.0

55.2

93

2700

triticale

3.4

12.2

48.1

82

2700+Arvika

triticale+pea

3.5

14.0

48.5

86

 

Additional forage crop performance data and production recommendations may be obtained from NDSU Extension Service or Research Extension Center offices.