Method for controlling discharge-type multidrug resistant plant diseases

1. A method for controlling a plant disease caused by efflux type multidrug resistant fungus, said method comprising a step of applying an effective amount of a dithiine tetracarboximide compound represented by formula (1):

to a plant or soil where the plant grows.

2. The method for controlling a plant disease according to claim 1 , wherein the efflux type multidrug resistant fungus is a fungus in which a resistance to a plant disease control agent is acquired by an overexpression of one or more membrane transporters selected from the group consisting of an ABC transporter and a MFS transporter.

3. The method for controlling a plant disease according to claim 1 , wherein the plant disease is one or more plant diseases selected from the group consisting of wheat disease and grapes disease.

4. The method for controlling a plant disease according to claim 1 , wherein the efflux type multidrug resistant fungus is one or more efflux type multidrug resistant fungi selected from the group consisting of wheat Septoria leaf blotch fungus and grapes gray mold fungus.

5. The method for controlling a plant disease according to claim 1 , wherein the efflux type multidrug resistant fungus is an efflux type multidrug resistant fungus having a resistance derived from a mutation of a gene encoding target protein of the plant disease control agent and/or a resistance derived from an overexpression of the target protein, said resistance being against one or more plant disease control agents selected from the group consisting of a respiratory inhibitor and a sterol biosynthesis inhibitor.

6. The method for controlling a plant disease according to claim 1 , wherein the step of applying to a plant or soil where the plant grows is a step of applying to a seed.