I'm no expert, but look up early blight. I'd remove the leafs

If you have scale you have ants. Ants farm the scale. They bring it to the plant and eat the secretions. Systemic poison like orthene helps. Work on getting rid of the ants.

unfortunately yes...a horrible flashback. as it turns out, those are eggs. insecticide soap was helpful in washing them off. the soap dehydrates them (see previous blogger). what's most important is to find out which insect is laying those eggs. i went from white pellets (eggs) to tiny black bead-like structures. careful, this gets out of hand quickly. after multiple, daily sprays (which can get expensive) i took some leaves in to various nurseries. interesting, the black beads transferred to my white paper towel and they/ i was able to suddenly see tiny red spiders/ mites moving around. they all advised chemicals (sevin or malathlion) and although i purchased them as a backup, decided to make one more try and ordered a garden pack of beneficial insects (for full coverage. it was that bad. nearly lost several plants). most of the ladybugs flew off, however some stayed and worked on the mites allowing the greenwing larvae to hatch. the nemotodes were watered in and the beneficials for whiteflies worked it's magic (it was like a domino effect). i have to say, that i spent much less in comparison for the multitude of sprays i invested in and "all" of my plants look great (i was sure i would lose my rarest). of all the insects, the green lace larvae was the most effective. they're still flying around the plants. they're tiny and non-bothersome. take that from a no bug tolerance type person. it's best to try the beneficials first as chemicals kill good and bad insects and will inhibit the effectiveness of the beneficials. you'll be amazed. i was. as it stands, the chemicals are still stored in my garage, unopened. here's the link i ordered from. they were realiable and guaranteed delivery of live beneficials. i found them to also have the best prices. good luck and let us know how it works out. http://www.buglogical.com/index.asp great site by the way.

I have a similar problem and am using this recipe with some success: 1 bulb garlic crushed, 1 onion crushed, 1 Tbl cayenne powder, 1 Tbl liquid dish soap, 1 quart of water. You can spray or just splash/rub it on the leaves by hand. Many find that a mild dish soap solution alone will work. Good luck!