Glasshouse whitefly, also known as Trialeurodes vaporariorum, is a common pest that can be found in greenhouses, conservatories, and on indoor plants. These small, winged insects are about 2mm in size and have a white, waxy coating on their wings. They are known to cause damage to a wide variety of plants, including tomatoes, cucumbers, peppers, and ornamentals such as ficus, poinsettia, and hibiscus.