P.E.I.’s chilly and moist spring weather has led to the emergence of tar spots on some trees, causing concern among residents. Kurt Laird, an expert arborist from Laird Tree Care, noted an increase in reports of trees shedding leaves prematurely, giving the appearance of autumn in backyards.
The tar spot fungus is affecting Norway maple trees, which are classified as invasive in the province. These black spots block the tree’s water supply, leading to leaf drop. Laird explained that the rain spreads the spores, facilitating their movement around trees and properties.
According to the province, tar spots are a common fungal disease predominantly seen on Norway maples, commonly planted in municipal areas on Prince Edward Island. The statement reassured that the disease does not pose a safety risk, and treatment is often unnecessary.
Laird highlighted that the recent damp springs on P.E.I. have accelerated the appearance of tar spots earlier in the year than usual. He anticipated a challenging year for tree health due to the fungus, while many are just now observing its effects.
Addressing treatment challenges, Laird discussed the complexities of applying fungicides during damp conditions. Despite fungicide spraying potentially aiding in control, restrictions on pesticide use have limited effective options. He emphasized the importance of maintaining tree health and properly disposing of fallen leaves to mitigate the spread of the fungus.