Sorghum - Sudangrass

(Sorghum bicolor x Sorghum Sudanese)


* Thin stemmed, fine seeded product.

* Very fast regrowth for high yield.

* Juicy midrib improves palatability.


Grazer II is a small seeded palatable three way cross that can be used for grazing or hay. It is a thin stemmed type allowing for faster dry down for high quality hay production. Regrowth of Grazer II is very fast giving it high yield potential. The juicy midrib of Grazer II greatly enhances palatability over dry midrib types. Higher rates of planting will produce a thinner stemmed forage.



Disease/Insect/Nematode Ratings:

Downy Mildew: MR


Agronomic Traits:

Early Seedling Vigor: Good

Growth Habit: Upright

Recovery After Cutting: Good

Maturity: 63 days to Boot

Uniformity: Fair

Plant Color: Purple

Midrib Type: Juicy


Planting Rates:

Bushel weight: 56 lbs.

Seeds per Pound: 19,000 – 21,000

Rate (Lbs.): Dryland Irrigated

10 – 30 35 - 100

Seeds/Sq. Ft. 5 – 14 17 – 48


Adaptation Ratings:

Photosynthetic Type: C4 - Warm Season

Soil Temperature: Warm (60 F)

Water Requirement: Very Low


Crop Use Information:

Life Cycle: Annual

Ease of Establishment: Good

Shade Tolerance: Poor - Fair

Drought Stress: Good

Wet Soil: Fair

Low pH Tolerance: Moderate

Minimum pH: 6.0

Saline Soils (White Alkali): Fair

Saline – Sodic Soils (Black Alkali): Poor - Fair

Hay: Excellent

Silage: Excellent

Continuous Grazing: Do Not Continuous Graze

Rotational Grazing: Excellent

Palatability: Excellent

Anti-Quality: Prussic Acid and Nitrates


Maturity Stage: Milk

% Crude Protein: 8.93 % ADF 32.14

% ADF: 39.88 % NDF 68.23

% NDF: 64.02 % IVTD 60.48

% Fat – Ether Extrc: 4.81 % UnDF 39.52

% TDN: 58.38 % CWD 42.04

% NFC: 17.11

% Calcium: 0.31

% Phosphorus: 0.15

% Magnesium: 0.23



Grazer II Sorghum-Sudan Management & Production Guide:

Strengths Weaknesses:

Thin stemmed product.

Small seeded product Leaf area thins near the top Juicy midrib. Poor plant color under stress.

Limited Downy Mildew resistance.

Low water requirement.

Short maturity requirement – 60 days.



Soil temperature should be at least 60 F.

Grazer II is usually planted between June 10 and July 10 in the northern states.

Can be no-tilled into the stubble of winter and spring crops.

Planting depth should be 1”.

Do not plant on soils with pH greater than 7.5 to 8.0. Chlorosis will be a severe problem.



Grazer II is usually harvested 63 - 65 days after seeding.

Protein will decline as harvest is delayed, but energy will increase upon heading due to continued sugar formation in the sorghum stalks and leaves, and carbohydrate deposition in the developing grains.


Avoiding Nitrate and Prussic Acid Poisoning from sorghum:

Avoid large nitrogen applications prior to expected drought periods.

2,4-D can increase Prussic Acid concentration for several weeks after application.

Do not harvest drought damaged plants within 4 days following a good rain.

Do not greenchop within 7 days of a killing frost.

Cut at a higher stubble height, nitrates tend to accumulate in the lower stalk.

Wait 1 month before feeding silage to give Prussic Acid enough time to escape.


Quality Data - Grazer II Sorghum-Sudan:

Texas Veterinary Medical Diagnostic Laboratory ABT/WL Research, Inc.

1997 Data 1997 Data