A: Thank you for bringing in some samples of your tree damage. It would have been difficult to locate the small, white cocoons and then identify the insect without seeing those samples. The caterpillar is probably from the… Read More
Category: Pests & Disease
A: The red bay psyllid, Trioza magnoliae, was originally called the bay magnolia psyllid (Ashmead 1881) because the host plant from which it was originally described was believed to be the plant that is now known as sweet… Read More
Q: My neighbor’s oak died suddenly. Now mine is doing poorly and I wanted to be sure it wasn’t a disease that might spread to mine. What could have caused it? A: Thanks for bringing me cuttings of… Read More
A: Thank you for bringing samples of your oak tree into the plant clinic. These small structures on the stem are called bullet galls. These growths are caused by a very tiny female wasp, Disholcaspis quercusvirens, placing an… Read More
Q: I found these unusual growths on my oak trees. What are they and will it cause my oak tree to die?
A: Thank you for bringing this to the Extension office; I have seen this gall only one other time in my thirteen years of being a Horticulture agent in Nassau County. I believe the gall is called an… Read More
Q: What is wrong with my magnolia tree? It is very large but some limbs are dying and the leaves are yellowing between the veins? A: After exchanging some phone calls and looking at a few photos I… Read More
Q: What is wrong with my loquat? Some of the branches are dying from the tips and the fruit is dried up and dead. A: Your loquat has a disease called fire blight, which is caused by bacterium (Erwinia amylovora),… Read More
Q: What are these growths on my pignut hickory leaves? I think they are insects and they are chewing my leaves. A: I appreciate you bringing in samples of the growths as this helped me identify the problem… Read More
A: You most likely have one of the cultivars of Eucalyptus globulus which is not native to this country. It prefers well drained, acid soils. I suspect with all the rain we have been receiving and the once… Read More
Q: My elm tree has dropped hundreds its tips and they are all under the canopy. What could be causing this?
A: This is a common question during the fall from both homeowners and commercial sites – no one is immune. More than likely it is the result of a long-horned beetle called a twig girdler. Twig girdlers are… Read More