Even distribution can be made by gently shaking the material on leaves in the lower to middle leaf canopy of the crop. It is very important to scatter the pupae on a dry leaf or other surface in direct sunlight. Leave the vermiculite in place for a few days to allow emergence and distribution of the wasps. Green Lacewing . Generalist predators may provide some control in Alaska greenhouses.
Green lacewings are predators found in most environments.
Several species of Chrysoperla and Chrysopa are important predators. The common green lacewing occurs throughout North America, while other species are more restricted in distribution. The female lacewing lays eggs usually in groups on leaves, each egg held away from the leaf surface on the end of a slender stalk. A female lays up to 300 eggs over a period of 3-4 weeks, but often it does not survive that long in the field. IPM of Alaska supplies green lacewing as larvae in individual cells, in bottles, or as eggs.