The fungus of Drechslera oryzae produces toxins which are highly toxic to rice seedling name of such toxin is

The fungus of Drechslera oryzae produces toxins that are highly toxic to rice seedling name of such toxin is ophiobolins. Neither ABA, trimethyl amine nor isobutylene.
Drechslera oryzae causes brown leaf spot disease in rice (Oryza sativa L.). This fungal pathogen produces a series of ophiobolins that cause some of the characteristic symptoms of the disease when applied to rice leaves at 10^-4 and 10^-5 M.