Insectary Plants and Beneficial Insects by Curlydock

My recent surge of interest in insectary plants and beneficial insects found me in the garden with my camera. I spent about an hour taking pictures of any insect I saw and noting the plant each insect was seemingly associated with.

I did this on September 8, 2007, in my small experimental urban organic garden located in Jefferson County, Kentucky, USA. These are a few of the pictures.

I am not expert at insect identification. If you think my guesses or any other data I give are not correct, please feel free to leave a comment with your own opinion.

To avoid the use of chemical poisons, I hope to eventually have enough of the right kind of insectary plants. The theory is that the right plants will attract the kinds of good insects that predate on the bad insects. Bad insects do bad things like chewing big holes in my broccoli leaves, for example.

I understand that one should not attempt to wipe out the bad bugs altogether. Enough of the bad bugs should exist to feed the good bugs so the good bugs will stay in the garden and not have to leave in search of a meal. While this is not mechanically efficient, an argument could be made that mechanical efficiency is not a sustainable way to relate to the environment.

One should seek the productive balance innate in stabilized diversity and then not sully that balance with pollution, poisons, and the exhaustion that comes from expectations of competitively efficient exponential growth. The correct balance can be productive enough to sustain the lives of farmers and those who depend on farmers for meals, were the world not obsessed with greed.

Since the good bugs burn a lot of energy in their hunt, they need the nectar and pollen of flowers to help sustain that energy. To that end, some plants are better than others at attracting good bugs. The shape of the blossom might help or hinder the access of a particular insect to the pollen and nectar the plant offers. Also, some plants can attract aphids or insects that are specific to that plant and will not harm garden plants but will provide meals for the good bugs. Not all plants bloom at the same time, so in a diversity at least one plant will always be supplying the good bugs with what they need. It is also possible that the wrong plant would attract bugs bad for the garden or host diseases also bad for the garden.

So, it can get complicated. I need to study hard to find the right combination of insectary plants to grow in or near my garden. On the bright side, the complexity of the study is deep enough to keep one interested for a whole lifetime. One need not study rocket science to keep from getting bored. How nature grows diversity will suffice.

bumblebee

Image 417 is perhaps a bumblebee. Some think it is, instead, a carpenter bee. They look a lot alike but I understand the abdomen of the carpenter bee is slick instead of hairy. This insect is beneficial because it pollinates flowers. The bee rests on the flower head of Garlic Chives (Allium tuberosum). The bee was so still I thought it might be dead or asleep. Or drunk? When I finally nudged it, it moved sluggishly but it never flew or even buzzed all the time I was there.

image 498

Image 498 shows what seems to be a different type and much smaller bee. This one is on a marigold blossom.

image 398

Image 398 shows what I believe is a soldier beetle called Pennsylvania Leatherwing (Chauliognathus pennsylvanicus). Many say it is beneficial but at least one said this insect’s value may be exaggerated. Even if it does not eat bad insects, at least it seems to be a good pollinator of Garlic Chives, for there were a lot of these soldier beetles there.

image 490

Image 490 may be a Green Bottle Fly, I am not sure. Green Blow Flies are supposedly associated with decaying flesh, but there were a lot of these really interested in the Garlic Chives. Nothing smelled dead.

image 437

Image 437 may be what is called a “Question Mark” butterfly, but I am not sure. It rested close to corn and beans.

image 460

Image 460 shows a wasp that repeatedly returned for a drink of water from the little watering hole. Many wasps are beneficial because they predate on bad bugs.

The watering hole is made of an overturned garbage can lid. I keep it replenished with water from the rain barrel. I change the water at most after every couple of days to keep mosquitoes from breeding in it and to keep it from stagnating. I had hoped the watering hole and an adjacent shelter hole would attract a toad, but I have not seen a toad yet. I did see a blue-tailed lizard not too far from the water, but that was much earlier in the year.

image 378

Image 378 shows, I believe, the eggs of a Leaf Footed Bug or Stink Bug. The eggs were attached underneath a leaf of broccoli. I did not see any adults this day, but I have seen them before. They have hind legs that are flattened like a spatula or leaf. Some of them may be beneficial, sucking on caterpillars of bad bugs. But I suspect the ones around here are only interested in sucking juice from the broccoli.

image 379

Image 379 shows a moth caterpillar that might be an “Inch Worm”. It has been feasting on the broccoli and a bad type. I hope someday I see a beneficial insect feasting on it.

image 383

Image 383 is a young, I think, type of Harlequin Bug. They also eat the broccoli.

image 433

Image 433 is a Garden Spider, (perhaps Argiope aurantia). I understand that these spiders need a source of water. This one was about 4 feet from the watering hole and very near the corn and beans. I believe spiders are, on balance, beneficial.

In conclusion, many insects could be seen in one hour in my organic garden. Some were beneficial and some were not. Many pollinators were seen. Many destructive insects were seen. I would like to see a lot more beneficial predators. I recently transplanted some Golden Rod to my garden. I found it on a farm in an adjacent county. I have heard that Golden Rod is a good insectary plant. That it aggravates hay fever and allergies is a bad rap and is not true, from what I have read. I plan to introduce more selected flowers in the future. When I planted the Garlic Chives (Allium tuberosum) I did it for food. I did not know it was an excellent insectary too, until I saw it in action.

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