White Dots on Leyland Cypress: Cones, Not Pests

Photos showed white dots on one Leyland cypress in a crowded row. One tree died last year. Owner asked if dots were insects or cones.

The expert identified the dots as developing cones. The dead tree likely succumbed to Seiridium or Bot canker (detailed again). Advised monitoring for canker symptoms on remaining trees.

Cone vs. Problem

• White dots = young cones.
• Dead neighbor = canker disease.
• Sanitation: prune dead, disinfect tools.
• No fungicide cure once infected.