Device for collecting pathogenic fungi of rice blast

The device comprises a box body and a box cover, a partition plate is transversely arranged in the box body and divides the box body into an upper cavity and a lower cavity, a miniature refrigerator, a rotating motor and an oxygen bin are arranged on the left side, the middle and the right side of the lower cavity respectively, the miniature refrigerator is connected with a cold air pipe, and the rotating motor is connected with the oxygen bin. A first oxygen conveying pipe is connected outside the oxygen bin, a second oxygen conveying pipe is connected to the oxygen bin, an electromagnetic valve is arranged on the second oxygen conveying pipe, a screw rod is connected to a crankshaft of the rotating motor, a screw cylinder sleeves the screw rod, a limiting disc and a plurality of collecting discs located above the limiting disc are arranged on the screw cylinder, and collecting cups are arranged on the collecting discs; the top end of the screw cylinder is fixedly connected to the box cover, a PLC is arrange