What is this stuff growing on my tree?
Patrick Smith
4 months ago
last modified: 4 months ago
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floral_uk z.8/9 SW UK
4 months agoPatrick Smith
4 months agoRelated Discussions
Help! What is this black stuff killing my customer's trees?
Comments (14)I don't know what is happening to those elms you are seeing. I have to wonder if it is not something secondary, though I have no real evidence of that, other than the droughts of the last couple years. Locally, I am seeing ALLOT mature elm suddenly collapsing and dieing over the last month.I've been attributing it to the last two exceptionally bad summers we have had, weakening them against pathogens. Even if traditional weather rules, there will be tree death for the next 4-5 years due to the last two years. Arktrees...See MoreWhat's this white stuff on my new trees leafs?
Comments (23)Mealy bug usually proliferates in leaf axils. From there, they can go on to colonize all over the plant, but we should be seeing "mother colonies" in the leaf and branchlet axils. What's more-and I started dealing with mealy bug as a greenhouse pest in the 1970s-mealy bug is almost always soft and squishy. The fact this is in Cali does suggest that it is at least possible this could be that insect group-mealy bugs are not found in the outdoors except in year-round warm areas-but the hardness or crustiness suggest this is something else. I still think it's bird poop. +oM...See MoreWhat is white stuff growing on my Gold Dust Aucuba?
Comments (1)It is an infestation of mealybugs, a small insect that sucks sap out of plant leaves and stems. In a smaller plant, I find it easiest to swab down the leaves and stems with rubbing alcohol. If a larger plant, you can use a Neem or horticultural oil spray. Following either process, I would hose down the plant thoroughly with water....See MoreWhat is this black stuff on my tree?
Comments (3)It kind of rubbed off. Not powdery. I actually think I solved the mystery though. I remembered that my husband had applied some clear gel bird repellent in that tree maybe a year ago where birds would sit and leave droppings all over the patio and grill. I showed him these spots and he said that was right where he'd applied the repellent. So I think that's what it is. Mystery solved. (I think)....See MorePatrick Smith
4 months agoPatrick Smith
4 months agoken_adrian Adrian MI cold Z5
4 months agogardengal48 (PNW Z8/9)
4 months agoken_adrian Adrian MI cold Z5
4 months agolast modified: 4 months agofloral_uk z.8/9 SW UK
4 months agoPatrick Smith
4 months agoPatrick Smith
2 months agoPatrick Smith
2 months agoPatrick Smith
2 months agoPatrick Smith
2 months agobengz6westmd
2 months agolast modified: 2 months agofloral_uk z.8/9 SW UK
2 months agoPatrick Smith
2 months ago
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