Q&A With the Pros:

QUESTION: Mosquitoes are becoming more of a concern, as the incidence of diseases such as West Nile and Zika viruses become more prevalent. People are searching for natural remedies, and one of the most popular is the citronella plant. Does this plant really keep mosquitoes away? And do citronella oil or candles work better than the plant? —Russel Mullin

Citronella grass () is sold in many nurseries, and is usually displayed along with a big sign promoting its ability to ward off mosquitoes. It’s no wonder people buy them and plant them in their gardens or in a planter on the patio. All of this promotion is