The Hairy Rose Beetle: The Pest That Eats Your Flowers Before They Become Fruit

The damage here doesn’t start at the fruit – it starts long before. The hairy rose beetle (Tropinota squalida) attacks flowers directly, feeding on the stigmas and petals, preventing fruit set entirely. The result? Losses that can reach 90% of your harvest if you don’t act at the right time.

What Is This Insect?

A black, hairy beetle that attacks the flowers of stone fruits – almond, apricot and cherry – as well as many other fruit trees and both wild and cultivated roses. It feeds directly on flower parts, preventing fruit formation.

How Do You Know Your Orchard Is Affected?

• Petals and stigmas that are eaten or torn
• Flowers dropping without setting fruit
• Black hairy insects found inside the flowers

Life Cycle:

A complete cycle producing one generation per year:

• Eggs: The female lays 100–300 eggs in moist soil rich in organic matter
• Larvae: Hatch after 2–3 weeks and feed on organic matter and fine plant roots in the soil
• Pupa: The larva transforms into a pupa inside a mud cocoon in the soil
• Adult: Emerges in early spring and immediately begins attacking flowers

How Do You Fight It?

First – Chemical Control (Most Effective):

• Spray with flower-safe insecticides: Dynamo or Alpha Super
• Concentration: 25–30 ml / 100 litres of water
• Use a fine, light mist to avoid damaging the flowers
• Spray in the early morning when the insect is most active

Second – Mechanical Control (For Small Areas): Collect insects by hand in the early morning or just before sunset when they move slowly.

Third – Water Traps (For Large Areas):

• Use blue or white plastic dishes or containers
• Fill with soapy water and place under the trees
• Add vanilla or other attractants to increase trap effectiveness

⚠️ Remember: This pest attacks the flower – once it drops, there is nothing left to save. Early action is everything.