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I have been growing quite a few apple varieties in recent years.
Generally, their disease resistance matches with what "the experts" and publications say.
But I have a few anomalies and was wondering if others have seen the same.
The main anomalies centre around scab and are:
Bramley
Supposed to be scab susceptible.
Mine seems to be resistant.
Fiesta/Red Pippin
Supposed to have no particular disease resistance.
Mine seems resistant to scab (and mildew).
Golden Delicious
Supposed to be scab resistant.
Mine is scab susceptible.
James Grieve
Supposed to be scab susceptible.
Mine is scab resistant.
Pinova
Supposed to be scab resistant.
Mine is scab susceptible.
Spartan
Supposed to be scab resistant.
Mine is scab susceptible.
Worcester Pearmain.
Supposed to be scab susceptible.
Mine is scab resistant.
Defining "susceptible" and "resistant" is not as easy as it might sound.
For example.....
Both my Golden Delicious and Spartan had a large number of scab lesions all summer, but the lesions all appear to be small - as if the scab was fought off.
My Pinova has some scab, but it's limited to extensive scabbing of a small number of leaves - as if most leaves resisted attack, but those leaves that were infected were overwhelmed.
So, perhaps Golden Delicious and Spartan do have resistance
- but in the form of fighting off an attack on the leaves AFTER the lesions start to form.
Whereas Pinova resisted attack on most leaves, but the small number of leaves and shoots that got infected were extensively damaged.
Perhaps the resistance or susceptibility may be dependent on the particular strains of scab present in the local area?
There are plenty of crab apples in nearby streets or gardens, most of which are severely scabbed, so there's no shortage of scab spores around.
Has anyone else had such anomalies with their apples - or anomalies that don't match my findings?
In fact, listing any scab observations would be useful.....
Thanks
FB.
Generally, their disease resistance matches with what "the experts" and publications say.
But I have a few anomalies and was wondering if others have seen the same.
The main anomalies centre around scab and are:
Bramley
Supposed to be scab susceptible.
Mine seems to be resistant.
Fiesta/Red Pippin
Supposed to have no particular disease resistance.
Mine seems resistant to scab (and mildew).
Golden Delicious
Supposed to be scab resistant.
Mine is scab susceptible.
James Grieve
Supposed to be scab susceptible.
Mine is scab resistant.
Pinova
Supposed to be scab resistant.
Mine is scab susceptible.
Spartan
Supposed to be scab resistant.
Mine is scab susceptible.
Worcester Pearmain.
Supposed to be scab susceptible.
Mine is scab resistant.
Defining "susceptible" and "resistant" is not as easy as it might sound.
For example.....
Both my Golden Delicious and Spartan had a large number of scab lesions all summer, but the lesions all appear to be small - as if the scab was fought off.
My Pinova has some scab, but it's limited to extensive scabbing of a small number of leaves - as if most leaves resisted attack, but those leaves that were infected were overwhelmed.
So, perhaps Golden Delicious and Spartan do have resistance
- but in the form of fighting off an attack on the leaves AFTER the lesions start to form.Whereas Pinova resisted attack on most leaves, but the small number of leaves and shoots that got infected were extensively damaged.
Perhaps the resistance or susceptibility may be dependent on the particular strains of scab present in the local area?
There are plenty of crab apples in nearby streets or gardens, most of which are severely scabbed, so there's no shortage of scab spores around.
Has anyone else had such anomalies with their apples - or anomalies that don't match my findings?
In fact, listing any scab observations would be useful.....
Thanks
FB.
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