> ## Documentation Index
> Fetch the complete documentation index at: https://badixth-dc85e378.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Diagnose and Respond to Thrips in Pineapple

> Identify pineapple thrips damage from silver flecking on leaves and fruit, and control with pre-forcing sprays, mulch color, and spinetoram or abamectin.

Thrips (mainly **Frankliniella and Thrips species**) rasp leaf and fruit surface tissue and feed on the released cell contents. On pineapple the main damage is **silver flecking on leaves and fruit**, plus **fruit scarring** and **transmission of Pineapple Yellow Spot Virus (PYSV)** in some regions. Thrips populations spike in hot, dry weather.

**Regional priority:** High in Hawaii, Philippines, Taiwan, and Australia (yellow spot virus vector). Moderate elsewhere as a direct feeding pest.

## When pineapple is most vulnerable

At **forcing to fruit set (months 12 to 15)** - thrips feeding at floral induction causes fruit scars and knobs that persist to harvest. Also at **early vegetative** where PYSV is a concern.

## How thrips show in satellite data

* Not detectable at Sentinel scale.
* Population dynamics track dry-hot weather; use weather forecast as the leading indicator.

## Field symptoms

* **Silver flecking** on leaf surfaces and fruit shells
* **Small, black frass dots** on the flecked surfaces
* **Fruit scarring and knobbing** if feeding was heavy at fruit set
* **Distorted young leaves** in advanced infestation
* **Yellow spot symptoms** where PYSV is present - yellow leaf spots that expand to necrotic patches, plant collapse
* **Best confirmed** by tapping a leaf whorl over a white tray and counting the small yellow-brown insects

## Reduce the damage by

* **Pre-forcing spray** - a single spinetoram or abamectin application before floral induction protects the developing fruit.
* **Scout with white tray beat sampling** every 2 weeks during dry weather.
* **Threshold** - action at more than 5 thrips per whorl during forcing to fruit-set window.
* **Silver mulch** deters thrips landing compared with black mulch.
* **Rogue PYSV-symptomatic plants** promptly in yellow-spot regions to reduce virus source.
* **Rotate modes of action** to slow resistance; thrips resistance develops fast. Spinetoram and abamectin are two groups - a third rotation partner must be chosen from the current register. **Methomyl has been banned in Malaysia since 1974** and is not a rotation partner - see [Pesticide registration](/snippets/pesticide-registration).
* **Avoid broad-spectrum sprays** that kill thrips predators (Orius, predatory mites).

## Set an alert for early warning

<Tip>
  Turn the diagnosis into a trigger. Thrips peak in hot-dry weather, so combine a weather alert with a scheduled pre-forcing spray reminder.
</Tip>

Recommended settings for thrips on pineapple:

* **Weather alert** - 10 or more consecutive days above 30 C with rainfall below 20 mm triggers a thrips scout.
* **Pre-forcing reminder** - schedule a thrips spray 1 week before every forcing application.
* **PYSV follow-up alert** - trigger a rogue-and-record walk if yellow-spot symptoms are found on any plant.

## Related

* [Pineapple Diagnosis](/guides/Crop/Pineapple/pineapple-diagnosis)
* [Mites](/guides/Crop/Pineapple/biotic/insects/mites) - overlap silver flecking; separate by webbing.
* [Black rot](/guides/Crop/Pineapple/biotic/diseases/black-rot) - thrips scars are entry points.
* [Set up automated crop alerts](/guides/alerts-notifications)