fungal disease

I acquired a couple of mature japanese maples at an auction a couple of months ago. One was, and still is, very healthy. The other not so much. Looking back, I realize I probably should not have purchased it as I noticed it had several issues at the auction, but alas, it does not seem severe...

I’m having some trouble keeping my Stewartia healthy. I have young psedocamelias that are dying and a few monadelphas that are better but the foliage looks unhealthy. I’m in the Auburn Ca area which is 9b. It’s hot and dry here. The trees get about 6 hr of direct light and a few hours of...

I'm coming up on 2 years of bonsai at then end of August here. Today I've made a gut wrenching discovery that I think is the answer to all of my "sun burn" or fungus theories over the past two years. Trees and plants in my neighbors' yards seem to be fungus infested. Like every leaf, covered...

I have a baby Japanese Ryusen maple and I started to notice the new leaves at the end of this one branch are turning black and dying. The rest of the leaves on the tree are green and healthy, just the ones at the end of this branch look not as healthy... It's been pretty hot here and the tree...

Hey all. Recently got a new black pine and it definitely was not in the best soil and was overwatered by the PO. It was slip potted by a friend to get it out of the bulk of the trash soil. Things are looking up and it seems to be improving and pushing candles, even tho candles are small this...

Every Japanese maple I own dies. I have had a 0-11 record with these trees. I actually decided I was done buying them till we move because I seemingly can't keep them alive no matter how hard I try. I purchased this tree last year and did a repot this year. Now I'm seeing signs of a bacterial or...

Hello, I have a Giant Sequoia that is about 3 years old that I have grown from a seedling. I've noticed that over the last few months I have seen some browning in small areas and a bit on the tips and new buds. Also it is now putting out quite a few suckers. Some context- Soil: A few months...

Hi all, I recently picked up a piece of Colorado Blue Spruce nursery stock. I really like the tree. However, CBS seem to be quite susceptible to a number of pests and diseases: Rhizosphaera needle cast, Cytospora canker, rust, bagworms, mites, etc. CBS in my area are all struggling. Do...

Picked up this scots pine from a local nursery in Massachusetts recently and I am worried it may have needle blight/cast. Though many needles look healthy others are turning brown and falling off. Some of the lower branches seem to be dying back completely. The tree is in dire need of repot...

I usually fertilize trees with high levels of nitrogen (18-18-18 or 19-6-20), but this years some trees have a fungal infection due to the wet and cold spring. I've heard that high nitrogen during this period make trees more susceptible to fungal infections, is that true? But what then to do...