In early spring these insects lay their eggs very close to where the aphids are. The larvae that hatch eat aphids and then turn into adults. They then lay their eggs and those eggs hatch when “thrip season” starts. … Spraying for them does not attract those beneficial insects because they have nothing to eat.

What does thrips feed on?

Thrips are primarily phytophages; that is, they eat plants and parts of plants, such as pollen, flowers, leaves, fruits, twigs, or buds. They consume flower heads of daisies and dandelions. In addition, they feed on onions, carrots, melons, cucumbers, peas, beans, roses, gladiolus, irises, and mullein.

What pests eat aphids?

Predators (which may consume all or parts of aphids) include green and brown lacewings, lady beetles, hover flies, midges, bigeyed bugs, damsel bugs, soldier beetles, and blister beetles. In many cases, both adults and larvae (or nymphs) feed on aphids.