1. feature

In conditions of high temperature and high humidity, Pythium infestation causes roots, rhizomes, stems, and leaves to turn brown and rot. At the time of onset, a round spot or elongated streak with a diameter of 15 cm first appeared. The mycelium was white and flocculous. When the grass and stem were dry, the mycelia disappeared, and the grass leaves withered and turned greenish red.

2. Hazardous object

Cold-season grass species and Bermudagrass, false grass and so on.

3. Control methods

(1) Strengthen turf management and rational irrigation. (2) Half-mixing with metalaxyl + Baiweiling or metalaxyl + diethylaluminophosphate.

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