How to control the late blight disease in potatoes

In this disease, irregular shaped spots are formed on the leaves.
Which causes the early fall of leaves, due to these spots, a brown layer is formed on the leaves which affect the photosynthesis process of the plant.
As the process of photosynthesis is affected, the plants are unable to produce food, stunting the growth of the plant and the plant dries prematurely.
Chemical treatment:-Azoxystrobin 11% + Tebuconazole 18.3% SC @ 300 ml/acre or Chlorothalonil 75% WP @ 400 gram/acre or Ketazin 48% EC @ 300 ml/acre or Metalaxyl 4% + Mancozeb 64% WP @ 600 gram / acre
Biological treatment: – Use Pseudomonas fluorescens @ 250 gm/acre.