ALFALFA: SW 8421S CHARACTERISTICS
ALFALFA: SW 8421S FACT SHEET

SW 8421S

SW 8421S produces high forage yields with or without high salt conditions. Using irrigation water with an Electrical Conductivity rating of 15 (very salty water), SW 8421S out-produced both the standard salinity check entry (AZ-90NDC-ST) and Salado by 39% and 32% respectively in University of Arizona salinity trials at Tucson.

Adaptation and Yields
SW 8421S is a non-dormant variety, with a fall dormancy rating of 8. Growth is erect with rapid recovery after cutting. It is adapted to areas of warm and hot temperatures from the central Sacramento valley to the low desert areas and coastal growing areas of California. SW 8421S has produced 15% more hay than Cuf 101 in the University of California trials in Fresno County, California and 14% more than Cuf 101 in Tucson, Arizona.

Resistance to Pests and Stand Resistance
This variety is highly resistant to Bacterial Wilt, Fusarium Wilt and to Spotted Alfalfa Aphid; resistant to Phytophthora Root Rot, Pea Aphid, Blue Alfalfa Aphid and to Southern Root Knot Nematode. Stand persistence in a three year trial at Tucson, Arizona was 96% at the end of three years, compared to Cuf 101 variety, which had a 61% survival of plants at that time.

Flexible
SW 8421S gives growers an 8 dormancy choice in both salty soils and good soils in temperatures typical of Central and Southern California alfalfa hay producing areas.

Variety Dormancy Bacteria Wilt Verticillium Wilt Fusarium Wilt Antherac Phytophthora Root Rot Spotted Aphid Pea Aphid Blue Aphid Stem Nematode Southern Root Knot Nematode Northern Root Knot Nematode

DISEASE/PEST RESISTANCE KEY:
HR: Highly Resistant
R: Resistant
MR: Moderately Resistant
LR: Low Resistance
S: Susceptible
– : Insufficient Data

FALL DORMANCY KEY:
1-9, with 1 being most dormant and 9 being least dormant

SW 8421S 8 HR HR R HR R R R

 

Proven to be the highest yielding, Dormancy 8 Alfalfa tested in multiple University trials.

SW8421S Graph
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8421S

Proven to be the highest yielding, salt-tolerant, Dormancy 8 Alfalfa in multiple University trials.

Key Advantages

  • A non-dormant group 8 variety, produces high forage yields with or without salty conditions.
  • Growth is erect with rapid recovery after cutting.
  • Using irrigation water with an Electrical Conduc¬tivity rating of 15 (very salty water), SW 8421S out-produced both the standard salinity check entry (AZ-90NDC-ST) and Salado by 39% and 32% respectively in University of Arizona salinity trials at Tucson.
  • SW 8421S has produced 18% more hay than CUF 101 in the UC trials in Fresno County, California and 17% more than CUF 101 in Tucson, Arizona.
  • Stand persistence in a three year trial at Tucson, Arizona was 96% at the end of three years, compared to CUF 101 variety, which had a 61% survival of plants at that time.

Major Pest Resistance

  • Bacterial Wilt Highly Resistant
  • Fusarium Wilt Highly Resistant
  • Spotted Alfalfa Aphid Highly Resistant
  • Phytophthora Root Rot Resistant
  • Pea Aphid Resistant
  • Blue Alfalfa Aphid Resistant
  • Southern Root Knot Nematode Resistant