The CDC recently posted this advice for preventing mosquito bites: CDC Zika Prevention
Keep mosquitoes out of your family’s outdoor spaces by planting these mosquito repellent plants
Natural mosquito repellent candles & plants from Clovers Garden — DEET-free, family-made in the USA since 1957.
Thanks for the question. No they do not need full sun but do best if getting sun for most of the day. The Lantana especially thrives in heat but both Citronella Geranium and Lemon Grass will do fine in in partial shade.