Lemon Tree Problems

[damethod]

My Lemon tree is producing great this year. However, the lemons are full of what look like scratches or scabs. Last year it only produced a few lemons and they looked even worse. I've researched online and come to the conclusion that the tree is suffering from Citrus Scab. I've been spraying it once a week with Liquid Copper Fungicide. Can anyone tell me if I'm on the right track? Could it be canker? I've even heard that it could just be birds!

Also, these lemons have been growing since late January...when do you think they will be yellow and ripe?

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