Old and New Ways of Gardening for Nature

This year I’m getting a great display from this fancy daylily, the variety name of which I’ve never noted down. Now that I’m writing about the garden, I’ll have to be more meticulous in labeling, so I can share that information. 

I made this watering place with the first intention of keeping deer away from the bog tubs. I don’t mind if they drink out of them, but they do some clumsy damage wending through my container plantings, knocking pots over. What I have is a ceramic tub, with an upside-down 12-pk of planting cells, such as are used to start seeds, and then a concrete paver on top. One thing I hadn’t expected is that the concrete would saturate. Tiny insects have been landing on top of the paver and drinking from the surface. With an arrangement like this, mosquito larvae can be dumped and the tub refilled.

With the bog tubs, and their mini-ecosystems, I don’t do anything about mosquitoes. The tubs only support about two inches of water above the accumulated soil mass, and the sparrows pick the larvae out of the shallows to feed on. Birds we like, swifts, martins, our endangered migrants, orioles and warblers, etc., eat mosquitoes, either adults, larvae, or both, and depend on them to a degree.

Did you know that honeybees and wasps drink water? So do several other beneficials.

Now, going back to the 90s, when I started gardening, the organic world still touted pest control as an unquestionable thing. If you saw caterpillars, you wanted them gone—as you were taught. The magazines featured pests of the month and how to eradicate them; the catalogs that sold organic supplies offered poisons to kill insects, chemicals to destroy fungi…in those days, even glyphosate was sometimes recommended as a herbicide. Little rings containing Bt, bacillus thuringiensis, were and are sold to place in tubs and ponds. Bt is fatal to moth and butterfly larvae; there is not much evidence that it kills bees, though adults drinking water from Bt-containing ponds must be thought to carry it back to the hive. [From Bee Culture magazine, a good survey article on mosquito control and threats to bees.]

Aside from changes of water, duckweed is another poison-free method for controlling mosquitoes. If you wonder what’s wrong with duckweed, other than aesthetics (I think it looks fine, myself), it consumes oxygen at night, and can deplete a pond where fish are kept (but in rare circumstances). On the other hand, goldfish and koi will eat duckweed. If you have a large pond, an aerator will keep the surface too choppy for the mosquitoes to lay eggs, and aerators that run on solar are easy to find. 

And since we don’t know what’s drinking out of our water features, and we want to supply water to as many creatures as need it, no kill methods, leaving out even treatments said to be organic, are best.

A book I’m reading, and recommend, if you want to make your backyard a habitat. The author explains both why and how to design a native planting scheme, which you can adapt to your preferences and inherited plants. (I’ve written about my callery pear, its good, bad, and weird points. But it belongs to the yard, and the wildlife gets a lot of use out of it; the huge oaks, however, are the real anchors to my patch of the natural world.)

Tallamy’s contention is chiefly this: that each of us who has a piece of this land is already empowered to link it to a national habitat, each little patch doing its work to sustain what America no longer has the human-free areas to guarantee without our help.





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