Oxathiapiprolin-based fungicides provide enhanced control of tomato late blight induced by mefenoxam-insensitive <i>Phytophthora infestans</i> - Fig 2

Efficacy (A-E) and microscopy (F-H) of curative application (1 dpi) of oxathiapiprolin on late blight development in detached tomato leaves. Detached tomato leaflets were drop-inoculated on their lower leaf surface with sporangia of P. infestans and sprayed with oxathiapiprolin at 1 dpi. Leaf discs were removed at 2 dpi for microscopic observations. Lesion size and sporangial yield were determined at 4 dpi. A- Lesion size. B- Sporangial yield per leaflet. C, F- Sporulation of P. infestans in control leaflets. D, G- Response of leaflets treated with 1-ppm ai oxathiapiprolin. E, H- Response of leaflets treated with 10-ppm ai oxathiapiprolin. Note the necrosis induced by oxathiapiprolin.