Cryptolaemus montrouzieri | Predatory beetle against mealybug

Written by Kevin van Kester | Last update: 30. April 2023
 

The Cryptolaemus montrouzieri beetle is a powerful ally in biological pest control, targeting pests like mealybugs. This beetle's adults, measuring 5-6 mm, feature a distinct black shield and a brown-orange body. Their larvae, growing up to 14 mm, are covered in a waxy coating that resembles their prey, making them highly effective. Discover more about this natural enemy in this article.

The life cycle of Cryptolaemus montrouzieri

The complete transformation from egg to adult beetle takes around 35 days when temperatures remain at 25°C. The female Cryptolaemus montrouzieri beetles can live for over 60 days, producing up to 120 eggs during their lifespan under consistent conditions of 25°C. Approximately five days after mating, females begin laying eggs within mealybug colonies.

Applying Cryptolaemus 

For optimal results, release the Cryptolaemus montrouzieri predatory beetles during the cooler parts of the day. Be aware that ants can hinder their effectiveness, as they feed on honeydew and thus protect mealybugs from their natural enemies. To ensure maximum impact, scatter the beetles directly around mealybug colonies by carefully opening the container and distributing them over the infested plants.

Storage of Cryptolaemus 

Upon receiving the product, inspect it for any issues and aim to use it right away, or within 18 hours at the latest. If storage is necessary, keep the product in a dark, horizontal position at a temperature between 10°C and 15°C to maintain its quality.