It could be a fungus or blight of some sort though I am leaning towards eggs too. You dont happen to have a frog in you grow area do you? They dont really look like frog eggs but you never know. My wife had something similar one time on her orchids and rose bushes,she used a 1/10 dishsoap/water solution and washed her plants with it and it seemed to work. If you do that though make sure to rinse the plant and the soil out after real good. If that doesnt work what I've used on green house shows befor eis ladybugs and preying mantis's to control pests (only works if its a big problem though). Other than that I wouldnt even know where to begin.