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Download AOSA-SCST SEED PATHOLOGY SYMPOSIUM (pp. 53-102, free download)
(pp. 1-11)
An Assessment of the Standardization and Ability of the ASA-610 to Rapidly Predict Potential Soybean Germination1
Miller B. McDonald, Jr. and Dale 0. Wilson2
ABSTRACT:
The ASA-610 is a new commercial instrument developed to rapidly predict seed germination. This study was designed to determine whether the ASA-610 could predict soybean germination and which test variables influence ASA-610 results.
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(pp. 12-17)
Variability in Tests of Peanut Seed Germination1
G.A. Sullivan and J.C. Wynne2
ABSTRACT:
The variability among peanut (Arachis hypogaea L.) seed germination tests performed at three locations was determined. Relationships between laboratory germination tests and field emergence were also assessed using samples from 10 seed lots.
Seedling emergence in the field averaged about 20 % less than the mean of the germination tests. Field emergence ranged from a low average of 43% to a high average of 71%. Average field emergence and the mean of laboratory tests were significantly correlated (r = 0.88), indicating that the mean of several germination tests is an excellent indicator of relative seed quality of a peanut seed lot.
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(pp. 18-23)
Penicillium Contamination of Grass Seed Germination Tests1
D. C. McGee2
ABSTRACT:
Unusually high amounts of Penicillium spp. contamination of grass seed germination tests occurred in the Iowa State University seed germination laboratory in the winter of 1978-79. The contamination was particularly severe on blotters moistened with potassium nitrate, resulting in reduced germination of Poa pratensis L. seeds.
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(pp. 24-34)
A New Basis for Characterizing Germination1
Robert K. Campbell and Frank C. Sorensen2
ABSTRACT:
Procedures for characterizing seed lots (i.e., by mean and variation of days to germination, peak germination date, and other useful properties) are commonly complicated because frequency of days to germination does not have a normal distribution. A procedure is presented for minimizing this problem.
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(pp. 35-41)
A Combined Semi-Selective Medium and Serology Test for teh Detection of Xanthomonas Blight Bacteria in Bean Seed1
E. Trujillo and A. W. Saettler2
ABSTRACT:
A technique using a semi-selective medium and serological test (SSMS) was developed for the detection of internally-home Xanthomonas blight bacteria in bean seed. The semi-selective medium permitted the growth of Xanthomonas to high population levels in the presence of contaminating organisms while the serological test was highly specific for Xanthomonas bacteria. The new technique consistently detected greater levels of internal Xanthomonas contamination in bean seed lots than the seedling injection technique presently used by the Michigan Department of Agriculture.
Additional index words: pathological testing.
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(pp. 42-48)
Ratio Analysis: A Tolerance Evaluation Procedure for Two Component Turfgrass Seed Mixtures1
T. P. Riordan2
ABSTRACT:
A ratio analysis is used to determine whether a two component mixture of turfgrass is within tolerance. The procedure is not affected by changes in other crop seed, weed seed, or inert matter percentages; but it does take into consideration whether these values are within tolerance. The "Tolerance Section" of the Rules for Testing Seeds is followed; and the procedure is efficient, simple, highly accurate and adaptable to programmable calculator usage.
Additional index words: Ratio analysis, programmable calculator, turfgrass mixtures.
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(pp. 49-52)
Ratio Analysis Program for Tolerance Evaluation of Two Component Turfgrass Seed Mixtures1
T.P. Riordan, A.H. Bruneau, R.C. Shearman and E.J. Kinbacher2
ABSTRACT:
A program using a programmable calculator and printer has been developed in conjunction with a ratio analysis procedure to speed tolerance evaluation of two component turfgrass mixtures.
Additional index words: Ratio analysis, turfgrass seed mixtures, program mable calculator and printer.
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