What are peronosporales? Add a note on sporangiophore morphology.
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This is the most advanced family of order Peronosporales. It comprises 6 genera with numerous species. All of them are important plant pathogens which are obligate parasites of flowering plants such as onion, grape, bajra, jowar, maize, pea, turnip, beet, tobacco and many crucifers.
The diseases caused by the Peronosporaceae are called downy mildews. The mycelium is branched, tubular and coenocytic. The hyphae are strictly intercellular and occur in the stem but more commonly in the leaf.
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