Pests and Diseases Flashcards
How long can club root remain in the soil for?
20years
how is clubroot spread?
tyres on machines
tools
boots
what soil is club root worse on?
acidic - a low pH
what are the symptoms of club root?
yellowing, red or purple leaves.
plants wilting in hot weather
roots develop galls
whole root becomes distorted
decays into slimy mess
what are control method for club root?
burn affected plants
crop rotation
liming of soil to raise pH
dip new plants in propriety club root control
what plants does club root attack?
Brussels sprouts
cabbages
broccoli
(brassicas)
what are the symptoms of carrot fly?
leaves will be red tinged or yellow
young plants wilt/die
small cream coloured grubs can be seen on roots
how does carrot root fly attack?
seedlings and young plants are attacked by flies in in June, after hatching in May.
They chew the roots.
The grubs will tunnel into tap roots and make then unsuitable for selling/human consumption
apart from carrots, what does root fly attack?
parsley
celery
parsnips
what are the symptoms of apple canker? for top fruit
bark shrinking and cracking in rings around the stems girdling branches.
shrunken canker patches
shoots die back
what conditions are most common for apple canker?
moist
poor drainage
pruning scars
what are the control/prevention methods for apple canker?
prune out all infected branches
burn debris
spray fungicide that also controls scab
apart from apples, what else does apple canker attack?
Name some susceptible apple varieties.
pears.
Susceptible apple varieties include Gala and Spartan
what fruit is the spider mite and red spider mite found on? (soft fruit)
strawberries.
what is a spider mite/red spider mite and what damage does it do?
a miniscule brow and red mite that makes a fine webbing on the underside of leaves.
Noticeable in June
leaves wither, plants become weak.
If severe, destroy plants and plant new stock on different location.
