Adults glasshouse thrips can lay up to 100 eggs at a rate of one or two per day. These are often deposited on the younger leaves or in flower buds of host plants.
The immature stages (nymphs), are yellow-brown and have three stages of development. The first two stages, like the adults, feed by sucking sap and are entirely wingless. ‘Wing buds’ develop on the third stage which does not feed and is known as a pre-pupal stage. The pre-pupal and pupal stages take place in the soil and in sheltered places on the host plant. Wings are not fully formed until the adult thrips emerge.
The length of the life cycle varies and is affected by temperature. Under warm conditions the life cycle is completed in 24-35 days and glasshouse thrips can breed throughout the year.