Mamta just spotted the photo of the apple you posted from the link with Wilsonz curry...
googled apple disease and pests....
is it apple scab ?
http://www.endure-network.eu/about_endure/all_the_news/market_access_is_key_to_apple_strategies
or maybe aphid eggs ?
scroll down to the 3rd picture on here -
http://jenny.tfrec.wsu.edu/opm/displaySpecies.php?pn=380
Steve
actually its a bit difficult to tell from your photo as its too small, but this looks the most like it "oystershell scale"
http://jenny.tfrec.wsu.edu/opm/displaySpecies.php?pn=500
Steve
Thanks for looking it up Steve. Yes, it is Oytershell scale. I checked it with an apple nursery. I treated it last autumn, when I first noticed it on my apples. I will spray the tree again in summer a couple of times. If it doesn't work, I will get rid of the tree itself.
Getting rid of the tree Mamta? Is the infection too bad? How old was the tree? Only this year for the first time I planted Elstar, Jonagold, Golden delicious and Braeburn...I guess i have to be careful with timely spraying of fungicides, insecticides etc.