1. An agent for controlling wet rot of a plant containing 3-chloro-N- (3-chloro-5-trifluoromethyl-2-pyridyl) alpha, alpha, alpha-trifluoro-2,6-dinitro-p-toluidine as active ingredient. 2. The wet rot control agent of claim 1, wherein it is a disease control agent for application to the soil for cultivating a plant. A method for controlling wet rot of a plant, comprising applying an effective amount of 3-chloro-N- (3-chloro-5-trifluoromethyl-2-pyridyl) alpha, alpha, alpha trifluoro-2,6-dinitro-p-toluidine to the soil for plant cultivation. 4. The method of controlling wet rot according to claim 3, including applying an effective amount of 3-chloro-N- (3-chloro-5-trifluoromethyl-2-pyridyl) alpha, alpha, alpha trifluoro-2,6-dinitro-p- toluidine on the soil for cultivating the plant and then sowing the seeds of the plant or planting the seedlings of the plant in it. 5. The method of controlling wet rot according to claim 3, including applying an effective amount of 3-chloro-N- (3-chloro-5-trifluoromethyl-2-pyridyl) alpha, alpha, alpha trifluoro-2,6-dinitro-p- toluidine on the surface of the soil for cultivation without mixing with soil for cultivation. 6. The method for controlling wet rot of a plant according to claim 4, comprising applying an effective amount of 3-chloro-N- (3-chloro-5-trifluoromethyl-2-pyridyl) -alpha, alpha, alpha-trifluoro-2,6-dinitro-p -toluidine on the surface of the soil for cultivation without mixing with soil for cultivation. 7. The method of controlling wet rot according to claim 5, wherein the amount of 3-chloro-N- (3-chloro-5-trifluoromethyl-2-pyridyl) -alpha, alpha, alpha-trifluoro-2,6-dinitro-p-toluidine, applied to the soil for cultivation, is from 0.025 to 2.5 g / m (0.25 to 25 kg / ha) .8. The method of combating wet rot according to claim 6, where1. Средство для борьбы с мокрой гнилью растения, содержащее 3-хлор-N-(3-хлор-5-трифторметил-2-пиридил)-альфа,альфа,альфа-трифтор-2,6-динитро-п-толуидин в качестве активного ингредиента.2. Сре
