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Cooperative Extension: Garden and Yard

Managing Insect, Diseases, and Animal Pests

What could be killing the dogwoods on my property?

Question: I have several wild alternate-leaf dogwoods on my property that have died previously. They are all located in a similar section of the property. There are two others nearby that are alive but look terrible, with leaves only at the top of the plant. I have not seen a bug or insect on the […]

What is a late blooming flowering tree that would be good for our yard?

Question: What would be a good late blooming flowering tree for our yard? We currently have two apple trees and have never been able to eat the apples because of a fungus even after we’ve sprayed the tree. It’s time to cut those down and plant a flowering tree that blooms later in the season. […]

What is causing our maple trees to have black spots on the leaves?

Question: Our maple trees have big black spots on the leaves. My guess is it’s a fungus; is that likely? For now, assuming it’s a fungus, what’s the best product to treat it with? The maples are fairly new and small, so spraying would be possible. Answer: Kate Garland, Horticulturist From what I can see, […]

What are the small black bugs on my nasturtiums?

Question: A small black bug has taken over my nasturtiums! I’ve never seen an infestation likes this before on any of my plants. What are they and how do I manage them? Answer: Caragh B. Fitzgerald, Associate Extension Professor Those insects are aphids. Often aphids are not very problematic, but sometimes they can be severe […]

Wireworms are eating my root vegetables. Is there anything that will control them?

Question: Wireworms are eating my root vegetables. Is there anything that will control them? Answer: Jonathan Foster, Special Projects Assistant Unfortunately, there aren’t any effective treatments after planting and establishment of the pest, and the best controls are preparing the soil properly and siting the plants appropriately. Please refer to these resources for in-depth information: […]

What is eating the leaves of our Maple trees and turning the leaves red?

Question: Our Maple trees have some holes in the leaves that look like something is eating them. They also have red and black raised dots on the leaves. At the tips of some of the branches, the leaves look like they are starting to turn reddish as if fall foliage was starting! Should we be […]

My Beech trees have curled leaves. What could be causing this?

Question: My Beech trees have curled leaves. What could be causing this? Answer: Kate Garland, Horticulturist There’s a chance it might be beech leaf disease (BLD). It has been spotted and spreading rather quickly in the Hancock County region. I encourage you to take a look at this Maine Forest Service website for more information. Be […]

How can we save a lilac that has fungus growing on it?

Question: We have a dark purple lilac that had this fungus show up this spring on it, or at least that’s when we noticed it. It is well blossoming, plenty of leaves, etc. I am afraid this may be a death sentence for it but have learned not to necessarily rely on the internet. If […]

What could have eaten my cucumber seedlings?

Question: What could have eaten my cucumber seedlings? I planted eight and i only have two left. Answer: Liz Stanley, Horticulture Community Education Assistant There are a number of possible culprits, some of which work at night. Here are some possibilities and how you can avoid them going forward. Cutworms. These species have four categories: […]

What are the little green caterpillars found on an oak tree?

Question: This year, we had a huge amount of little green caterpillars in the oak tree in our backyard. If you sat under the tree for any length of time, you would have caterpillars all over you, because they were dropping down on little silks. The caterpillars seem to be gone now, but they ate […]

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