Abstract: An oviposition tray for ovipositioning of insect eggs, such as eggs of adult female black soldier flies, comprises a plastics oviposition tray body in the form of a planar block having a front and rear sides. The front side has a flat face defining a plurality of spaced, parallel, elongate egg laying recesses. Each recess has a length of between 8 mm and 25 mm, optimally approximately 17 mm, a width of between 1 mm and 6 mm, optimally approximately 2 mm, and a depth of not less than 2 mm. The oviposition tray body defines a number of ventilation apertures allowing for an airborne attractant to flow through the oviposition tray body for attracting insects to the oviposition try body to lay eggs. The oviposition tray body includes four spacers for spacing the oviposition tray body from other similar oviposition tray bodies in a stacked configuration of the oviposition tray bodies.