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Category Archives: Diseases
Yes the exceptionally cold, wet, cloudy spring has been particularly supportive of fungal and bacterial diseases during leaf emergence this year. And our ornamental crab-apples are paying the price with thinning canopies and dieback. Click HERE for the AUDIO … Continue reading
The black locust (Robinia pseudoacacia) are in full bloom as this is the phenology indicator species for the emergence of emerald ash borer adults.
Seeing dark spots and blighted tissue on our native maple leaves?
Click HERE for the AUDIO version of this blog post. We are seeing wind tattering damage on tender … Continue reading
Monitor for needlecast and blight diseases on older foliage where new foliage is emerging on PINE and SPRUCE.
What a treat! Several of our sugar maples are blooming this year all over southern Ontario, from Barrie to Niagara, these native beauties are gracing our landscapes with blooms. Its been 5 years since sugar maples were blooming like this. The cooler weather continues! Climatologists are predicting that our daytime temperatures will stay moderate until about the […]
Gymnosporangium rusts are sporulating now on Juniperus hosts. Look for orange, gelatinous structures on foliage and stems of various Juniperus spp. They are sporulating both in container production and in the field. They can usually be found sporulating when the … Continue reading