Canola Verticillium stripe disease

Question 1

Major diseases of Canola

Answer 1

blackleg, sclerotinia club root

Question 2

Verticillium stripes discovered

Answer 2

in MB 2014

Question 3

Infected stems after harvest

Answer 3

Blackening, microsclerotia can be seen on the inside of stem. After ripening microsclerotia germinated and produces conidia spores. Striping outside of the stem

Question 4

Verticillium Stripe Symptoms

Answer 4

streaking or striping on the stem

inside of stem is blackening and eventually microsclerotia

Question 5

Verticillium Wilt

Answer 5

caused by Verticillium longisporum. in 2014 MB. overwinters in the soils Capable of serving 10-15 years

Question 6

verticillium wilt

Answer 6

fungus infects the plant via roots, most often seedling stage. the fungus grows through the tissues

Question 7

Symptoms of verticillium wilt

Answer 7

a vertical yellow band extending up one side of the stem may be visible

Question 8

Scouting for the disease verticillium wilt in canola

Answer 8

best times at swathing, but it is possible to identify after harvest as microsclerotinia will continue to develop in the stubble.
the plants will turn black grey after harvest

Question 9

Management for the disease verticillium wilt in canola

Answer 9

no seed treatment or fungicides registered to end for this disease. 
there Is no host resistance in canola varities
# yr crop rotation

Question 10

Verticillium stripe infection

Answer 10

fungus enters through roots through a wound
hyphae and conidia are produced and move through the vascular system
multicellular microsclerotinia are formed in the dying tissue
causes tissue to turn grey then black
it is a monocyclic disease

Question 11

conditions for verticillium stripe

Answer 11

most effective in hot dry conditions

plants with damaged roots more susceptible

Question 12

Disease management for verticillium stripe

Answer 12

no foliar seed treatments currently register in CND

weed management
green manures
biosecurity
increase rotation 3 yrs