TABLE 2.

Stimulatory activity of seed exudate from various plant species to the germination of P. ultimum sporangia

Plant species	2-h exudate		6-h exudate
	EC50 (mg/ml)a	Goodness of fit (P value)	EC50 (mg/ml)	Goodness of fit (P value)
Corn	0.01	0.126	0.06	0.429
Radish	0.41	0.140	0.44	0.001
Pea	1.81	0.384	1.47	0.048
Carrot	2.19	0.099	1.59	0.029
Wheat	2.21	0.090	1.10	0.410
Lettuce	3.55	0.003	2.46	0.001
Cucumber	3.90	0.248	3.93	0.358
Sunflower	5.39	0.178	3.43	0.094
Cotton	9.21	0.001	4.41	0.234
Tomato	16.89	0.748	10.43	0.133

^aDose-response regressions from the probit analysis were significant at P < 0.001 for exudates from all of the plant species tested.