Name of fungicide

Times of dilution

Reagent concentration (μg/ml)

Log of concentration (x)

Probability value (Y)

Virulence regression equation Y = a + bx

EC 50 (μg/ml)

R²

99%恶霉灵 可湿性粉剂

3000

0.33

−0.4815

5.6219

Y = 6.9325 + 2.6572x

0.1874

0.9099

3500

0.29

−0.5376

5.5622

4000

0.25

−0.6021

5.3055

50%扑海因 可湿性粉剂

1000

1.00

0

4.1110

Y = 4.1438 + 3.5295x

1.7482

0.9709

1200

0.83

−0.0809

3.9197

1500

0.76

−0.1739

3.5015

70%甲基托布津 粉剂

2500

0.40

−0.3979

5.0728

Y = 8.3307 + 8.0776x

0.3870

0.994

3000

0.33

−0.4815

4.5155

4000

0.25

−0.6021

3.4368

40%福星乳油

12,000

0.0833

−1.0794

5.4565

Y = 8.1243 + 2.4859x

0.0554

0.9927

15,000

0.0667

−1.1759

5.1738

20,000

0.0500

−1.3010

4.9021