Nature's Way

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Ladybugs bringing good luck to everyone!
One of my favorite things about being a human being is the chance to experience how the web of life goes on around us every day, whether or not we participate, and whether we even notice.   A few weeks ago, that played out in a small but significant way in my perennial sunflower patch, and happily, I was there to notice and learn.

Because I’ve spent all my other summers in the Pacific Northwest, I haven’t yet gotten to see my Arivaca garden's sunflower patch in bloom.  Nevertheless, I always enjoy how the sturdy green shoots pop up out of the soil each spring and head up towards the sun.   So on the day I started getting my drip irrigation up and running for the first time this year, I saw that the bright green sunflower leaves had popped up, and I headed over to check them out.   Our sunflower patch is planted in the bottom of the "Sombrero Pond", which we built to catch and temporarily hold the monsoon storm water that runs off our patio and lawn each summer.  As soon as I got there though, I could see clusters of black on almost every rosette of leaves, each a mass of hungry aphids munching away. 

Ladybug adult finding "Thanksgiving Dinner"
After a few moments of feeling sheer disgust, I went to get the garden hose, knowing that a strong shower of H2O will easily knock these insects off plants, and damage many of them enough that they won’t survive to crawl back on.  Before turning the hose sprayer on though, I bent down low over each plant to see if any ladybugs were already on the scene.   Adult ladybugs are voracious aphid-eaters, and they will also only lay their tiny, beautiful golden eggs on the underside of leaves where they know there is plenty of soft-bodied insect prey for their larvae to eat.  But alas, I could see only one ladybug in the whole patch, and no eggs. 



Knowing that aphids are born pregnant (yes it’s true), which makes their reproduction rate astoundingly fast, I sprayed a shower of water at every aphid cluster except the one that the ladybug was feeding on.  When I rechecked the next day, I found still just the one ladybug, and once again avoided it as I sprayed water to knock hundreds of black squirming aphids off the other plants.   Ah… but on the third day, I was ecstatic to see that many more ladybugs had come to the rescue and were busy eating aphids!!!  Tachnid flies and other beneficial insects were also doing their part to help, and there was absolutely no need for me to intervene in the delightful scene.  

Tachnid Fly

Unknown (to me) beneficial insect

Ladybug larvae appear
On the fourth day, I saw several tiny, alligator-like ladybug larvae, and I knew that my “aphid problem” was officially over.  Even one ladybug larvae can eat approx. 400 aphids between when it hatches and when it creates its pupal case approx. 2 weeks later, and morphs into an aphid-eating adult.  A handful of larvae mean that a whole lot of aphids will soon be history.

And so each day afterward, I saw more and more adult ladybugs and larvae, and less and less aphids.  Pupal cases appeared quickly too, making me realize that ladybugs had been laying eggs in the vicinity at least a week or more before I first saw them, and that I had undoubtedly also overlooked larvae already present by then.

Now we got a party going on! 






Soon there were no aphids on any sunflowers in the patch. Knowing that plants already under some kind of stress can trigger aphids to attack them, one of the other things I had done after first seeing the aphids was to give gentle root zone irrigation to all the sunflowers, in case the big increase in daytime temperatures was stressing them. 

Ladybug pupal case on New Mexico Aster plant




When I thought to also check out a nearby New Mexico Aster that had been transplanted weeks before but was still suffering from root shock, I found ladybugs, larvae, and pupal cases on it too!  The “ladybug squadron” just doesn’t leave town until it has cleaned up every neighborhood…

 Sunflower plants now continuing skyward








To see some fabulous closeup photos of the 4 stages of a Ladybug's life, including their beautiful golden eggs, click on this link.  And to find out more about the wonderful world of beneficial insects, check out this free downloadable ID guide with life cycle photos and information about 18 common beneficials!

The sunflowers in my patch are now well over 2 ft tall, and their leaves and stems have outgrown any damage done to them by the aphids.  Though there is no longer any sign of the “mass carnage” that went on there, I hope that each time I gaze upon the beautiful, golden sunflowers this summer, I remember to appreciate the web of life that can play out so well without my help.   Those squirming aphids were not a “problem” at all… what really happened was that I just didn’t look long enough the first time I saw them on my sunflowers. 

If I would have spent a few more minutes before deciding to intervene with my water spray, perhaps I would have seen that my help wasn’t needed at all, because a delicious feast was already well underway.  Humbling and enlightening at the same time, a perfect example of nature’s way.

Photo credits:
All photos by Emily Bishton


 

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