Method for determining whether or not test sample contains phytopathogenic fungus

A method for determining whether or not a test sample contains a phytopathogenic fungus, the method comprising:

• (a) putting the test sample on a front surface of a substrate comprising a through hole;
• wherein
• the substrate comprises a cellulose film on a back surface thereof;
• the through hole of the substrate has a cross-sectional area of not less than 7.065 square micrometers and not more than 19.625 square micrometers;
• the cellulose film has no through hole;
• and
• the cellulose film has a thickness of not less than 0.5 micrometers and not more than 3.7 micrometers;
• (b) leaving the test sample at rest after the step (a);
• (c) irradiating the cellulose film with ultraviolet light using an ultraviolet light source provided so as to face the front surface of the cellulose film after the step (b);
• (d) bringing a back surface of the cellulose film into contact with a fungus color reaction reagent after the step (c);
• and
• (e) determining that the test sample contains the phytopathogenic fungus, if a color is given to the fungus color reaction reagent.