Phytophthora fragariae var. rubi
(click on the images to enlarge them)
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| Symptoms on
raspberry roots (Rubus idaeus var. Glen Moy). Note the brownish area
sharply demarcated from healthy tissue. |
Symptoms on
raspberry roots (Rubus idaeus var. Glen Moy). Note the brownish
area sharply demarcated from healthy tissue and the reddish discoloration
on some roots. |
Symptoms on
raspberry roots (Rubus idaeus var. Glen Moy). Note the reddish coloured
area on the root. |
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| Healthy raspberry
roots (right) and roots infected by P. fragariae var. rubi (left). On
infected plants, the secondary root system is completely destroyed,
and wilting is then irreversible. |
Wilting of
a raspberry cane of two-years old, when fruits are riped. Plants are
dying by dessication, as roots completely loose their assimilation capability. |
Sudden wilt
of suckers of the year. Foci extend from one year to another according
to the soil cultural operations and rainwash. |
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| Oospores of
P. fragariae var. rubi (x 400) |