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27/08/2020 5:09 pm
Topic starter
Powdery mildews of crops are caused by
(a) bacteria
(b) ascomycetes
(c) basidiomycetes
(d) phycomycetes
1 Answer
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27/08/2020 5:12 pm
(b) ascomycetes
Explanation:
Powdery mildews are caused by fungi belonging to the family Erysiphaceae (class-Ascomycetes). Ascomycetes spores are harmful and it makes the crop vulnerable to its toxin. The stem becomes a powdery mass.