Agriculture Reference
In-Depth Information
6b
6c
Plate 6.
Fungal leaf disease symptoms. (a) Lesion on onion leaf caused by purple spot infection,
Alternaria porri(image kindly provided by De Groot en Slot B.V., Broek op Langedijk,
The Netherlands
©
). (b) White flecking and leaf lesions on onion caused by leaf blight, Botrytis
squamosa(image kindly provided by De Groot en Slot B.V., Broek op Langedijk, The Netherlands
©
).
(c) A 'fur' of sporing bodies forming on an onion leaf infected with downy mildew, Peronospora
