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Contact Us
Seed Potato Cert. Program
223 Plant Growth Center
P.O. Box 172060
Bozeman, MT 59717-2060

Tel: (406) 994-3150
Fax: (406) 994-6042

potatocert@montana.edu
> MSU Potato Lab
Index of Disease Rate Infection (%)
for Visual Field Inspection

 

Rate (%) Diseased Plants /
Plants Counted		 Diseased Plants per Acre
1.0 100.0/10,000 180
0.5 50.0/10,000 90
0.25 25.0/10,000 45
0.125 12.5/10,000 22.5
0.05 5.0/10,000 9
0.01 1.0/10,000 1.8
0.005 0.5/10,000 0.9
0.001 0.1/10,000 0.18

The number of plants per acre is 18,000. The number of diseased plants/acre is calculated by "Rate times 180".

 

View Text-only Version Text-only Updated: 7/16/09
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