Purdue University Ag. Exp. Station
HAROSOY SOYBEAN
Mimeo AY-6E April, 1953
A. H. Probst, U. S. Regional Soybean Laboratory, U.S.D.A, and Agronomy Department, Purdue University
Harosoy is a new early maturing Canadian variety of soybean. It has shown considerable promise in Indiana in the 1951 and 1952 tests. Harosoy is slightly higher in yield, two days earlier in maturity, slightly taller, and less susceptible to stem canker than Hawkeye.
_ORIGIN AND DEVELOPMENT C. W. Owen of the Dominion Agricultural Experiment Station, Harrow, Ontario, Canada, selected Harosoy from the backcross of Mandarin X (Mandarin X A.K.). This variety was released to Canadian registered seed growers for 1952 production. Harosoy has been tested cooperatively in the U.S. by the Delaware, Illinois, Iowa, Michigan, Nebraska, Ohio, Pennsylvania, Purdue, South Dakota, and Wisconsin agricultural Experiment Stations and the U.S, Regional Soybean Laboratory, Urbana, Illinois in 1951 and 1952.
DESCRIPTION Harosoy has medium to large-sized yellow seeds with a colorless hilum. The pods are medium to large in size, mainly two and three seeded, dark gray in color, and are borne primarily on the central stem. The plants are medium to tall In height, indeterminate in growth and usually erect with purple flowers and gray pubescence.
PERFORMANCE This new variety has been grown in nine tests at five locations in Indiana in 1951 and 1952. The results of these tests are reported in Table 1.
This variety has performed sufficiently well that it ha3 been placed on the list of varieties acceptable for certification in Indiana.
ADAPTATION Harosoy is adapted generally in Indiana where Hawkeye is recommended. It is somewhat better adapted and has yielded higher than Hawkeye in the more northern counties of Indiana (See Table 1, part B). It's earlier maturity than Hawkeye makes it more desirable in rotations where wheat follows soybeans and where soybean planting is delayed.
DISEASES Canadian studies and Indiana observations indicate that Harosoy is less susceptible to the highly destructive stem canker disease than Hawkeye. Harosoy also has been observed to be somewhat less susceptible to downy mildew than Hawkeye and Blackhawk. Harosoy has not been observed to be any more or less susceptible to the other soybean diseases occurring in' its area of adaptation than other adapted varieties.
SEED SOURCE A limited quantity of registered seed of Harosoy was produced in Canada in 1952. No seed has been multiplied in Indiana, Several Indiana seedsmen have imported seed for 1953 production. Names of the 1952 Canadian seed growers may be obtained by writing to: Agricultural Extension Service,
Agronomy Department, Purdue University, Lafayette, Indiana, or Seed Certification Service, West Lafayette, Indiana. Names of Indiana seedsmen certifying Harosoy in 1953 will be available by September 1953 from Seed Certification Service.
Purdue University Agricultural Experiment Station, Lafayette, Indiana
in cooperation with
U. S. Regional Soybean Laboratory, Bureau of Plant Industry, Soils, and Agricultural Engineering, Agricultural Research Administration, U. S. Department of Agriculture, Washington, D.C.
(over)