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Posts Tagged ‘little round beetle on tomato leaves’

Tortoise beetle and larvae

Containers of Coleus, geranium, and herbs along the railing.

Containers of Coleus and geranium,
with herbs in pots along the railing.

We share our deck with lots of containers filled with beautiful plants. They add color and make it a more interesting place to sit and relax! Some of the pots are planted with flowers and foliage plants including some very colorful Coleus and others are planted with herbs that we snip fresh for cooking.

Two of the larger containers are planted with Juliet tomatoes. These miniature “Roma-type” tomatoes are our new favorite small tomato to grow instead of the cherry tomatoes we used to plant. In addition to the two on the deck, we also have two Juliet tomato plants growing in our vegetable garden. A tasty treat to munch on while working in the garden!

Juliet tomato

Juliet tomato

These delicious tomatoes are larger than a typical cherry tomato but bear just as prolifically. Their shape is oblong like a Roma tomato but they are smaller; growing up to 2¼” long and about 1¼” wide. They are meaty little guys and delicious straight off the vine (my favorite way to eat them), in salads, or for use in cooking. Yum!

Juliet is very crack resistant and stays fresh and firm on the vine longer than most cherry tomatoes. They also keep very well once picked but they always produce way more than we can eat fresh.

Juliet tomatoes are deliciously prolific!

Juliet tomatoes are deliciously prolific!

Last year in order to preserve the excess, we simply put them straight into freezer bags and froze them. Just straight off the vine – no processing required. Easy!

Whenever Eric made chili or soup or vegetable stew, he just pulled out a bunch of the frozen Juliet tomatoes, chopped them in thirds, and dropped them right in the pot. The skins can be fished out afterwards (or not) or you can thaw them a bit and slip the skins off before you cut them up. Simple and delicious!

Anyway …

Tomato leaf damage from the tortoise beetle

Tomato leaf damage from
the tortoise beetle

The other day when I went to pick some tomatoes off the plants on the deck, I noticed that several of the leaves were riddled with pretty large, very round holes. I’d never seen damage like this before. I’ve seen holes in leaves but never holes that were quite so uniformly round.

On further inspection, I found a few round, hard-shelled insects on the leaves. At first I thought they were some type of scale insect but when I poked one, it flew a short distance away and landed on another leaf – definitely NOT scale! Then there were some funky stationary ones that I assumed were either larvae or pupae.

Clavate tortoise beetle adult

Clavate tortoise beetle adult

This was a critter I was not familiar with. They didn’t seem to be doing much damage to the plant, just chewing lots of holes in a few of the leaves.

As it turns out, these were clavate tortoise beetles, Plagiometriona clavata. They do look a little like a turtle with a hard shell that covers not only their wings but their head as well. This particular species has a distinctive “teddy bear” shape on the shell.

Apparently these beetles are commonly found on plants in the solenaceous family which includes jimsonweed, nightshade, and also vegetable crops like tomato, pepper, and eggplant. We have four eggplants in a large container on the deck and I also noticed that a few of those leaves had these characteristic, round holes chewed in them. Tortoise beetles are also fond of morning glories which we happen to have planted in containers right beside our pots of Juliet tomatoes. Not surprisingly, many of the morning glory leaves are riddled with little round holes!

Tortoise beetle larva with fecal mass "shield"

Tortoise beetle larva with
fecal mass “shield”

The larvae of this beetle are unusual, too. They have an oval shaped, segmented body that is fringed with white spiny projections. The last segment of their body is modified with a forked projection which collects fecal material. This forked segment with the attached dried fecal mass is held over the body of the larva like a shield. It is thought that this may provide the larvae with some form of protection from predators through either camouflage or possibly as a type of repellent.

All-in-all, this is a very interesting and unique visitor to our plants and definitely not one that I had encountered before.

Always something new to learn in the garden!

Until next time – Happy Gardening!

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