Mulch can help or hinder mosquito control depending on how it is used. While mulch retains soil moisture and suppresses weeds, organic mulches like wood chips may retain moisture and create habitats favorable to mosquito breeding. To minimize this risk, keep mulch layers thin, avoid placing it close to building foundations, and consider using inorganic mulches like gravel in areas prone to pest issues. Regular maintenance of mulched areas can also help reduce pest activity.