Oh, dear.
This could be aphids, or it could be something more serious like sooty mold infection that inhibits photosynthesis (thus, the lime color). Here is more detail: http://cals.arizona.edu/crop/public/docs/Azbroccoli.pdf
You might find some advice here: http://www.clemson.edu/extension/hgic/pests/pdf/hgic2202.pdf
Our advice would be to harvest what might be edible.
And, we would ask, do you rotate your crops? Moving plants around, not growing in the same spot year after year, is one of the easiest/best ways to avoid plant pests and disease.
Best wishes—
Oh, dear.
This could be aphids, or it could be something more serious like sooty mold infection that inhibits photosynthesis (thus, the lime color). Here is more detail: http://cals.arizona.edu/crop/public/docs/Azbroccoli.pdf
You might find some advice here: http://www.clemson.edu/extension/hgic/pests/pdf/hgic2202.pdf
Our advice would be to harvest what might be edible.
And, we would ask, do you rotate your crops? Moving plants around, not growing in the same spot year after year, is one of the easiest/best ways to avoid plant pests and disease.
Best wishes—