In Control – Naturally August 2026

Thrips parvispinus: A New Thrips Threat

A new thrips species is making its way into greenhouses and indoor growing operations—and it’s one worth watching. Thrips parvispinus, also known as tobacco or pepper thrips, is an invasive pest that feeds on more than 100 plant species, including ornamentals, vegetables, cannabis, and many tropical houseplants.

Unlike many thrips that feed on older foliage, T. parvispinus prefers tender new growth and flowers. Its feeding causes silvering, bronzing, scarring, distorted leaves, and brown, damaged blooms. In warm greenhouse conditions, it can complete its life cycle in as little as two weeks, allowing populations to build quickly before significant damage is noticed.

Cannabis growers should be especially alert, as feeding on young shoots and flowers can reduce crop quality and marketability. Because this species closely resembles western flower thrips, accurate identification is critical before developing a control strategy.

The best defense is early detection and an integrated pest management (IPM) program. Regular scouting, sticky card monitoring, good sanitation, exclusion practices, and timely releases of compatible biological control agents can help keep populations below damaging levels.

As this invasive pest continues to spread, staying vigilant and responding early will be key to protecting high-value greenhouse crops.