Saturday, June 4, 2016

My, you look weird

The other evening we noticed these weird characters on the candelilla (Euphorbia antisyphilitica) in the front yard:

160530_Leptoglossus-phyllopus_heather

My wife snapped this photo on her cell phone.
Since it was dusk, the photo turned out grainy and fuzzy,
but you get the idea.

From a distance, they looked like very large and very orange ants.

What weird creatures were these?

The next morning, I got out my tripod and camera with a macro lens and took a series of close-ups. At several times life size, these insects looked even stranger. I was fascinated and put off in equal measure. (While spiders don’t bother me, I will admit that I have a moderate case of insect phobia.)

160530_Leptoglossus-phyllopus_001

160530_Leptoglossus-phyllopus_003

160530_Leptoglossus-phyllopus_011

160530_Leptoglossus-phyllopus_010

160530_Leptoglossus-phyllopus_007

Daughter #1, who had zoology in her sophomore year of high school, did a Google search using very basic words (something like “large red insect”) and found the answer almost immediately: These were nymphs (adolescents) of the Florida leaf-footed bug (Leptoglossus phyllopus). As its common name suggests, it’s native to Florida, but it’s found “throughout the southern United States from Florida to California, through Mexico and as far south as Costa Rica” (1). I have often seen the adults, but I can’t remember ever having seen these nymphs.

Further research revealed that the Florida leaf-footed bug is a common plant-sucking pest that can damage a variety of crops from tomatoes to beans to citrus. The damage they do ranges from hard spots on the fruit to immature fruit drop, especially on citrus. During the cold season, the bug is known to enter houses and take up residence in beds. I can feel some of you squirm!

I’m a big believer in “live and let live,” and I have too many things to worry about in my life that I don’t typically get hung up on insects (unless they crawl on me, then it gets serious). However, we have a young Meyer lemon tree nearby which, for the first time ever, has a real crop of fruit developing. After reading some alarmist articles about the damage this bug can cause to citrus, I tried to remove as many of the nymphs as I could. Ultimately, I managed to squish maybe two or three; the others simply scampered off. Now, a few days later, I’m back to “live and let live” or it’s Spanish equivalent, “Qué será, será.”

In case you were wondering about the Euphorbia antisyphilitica these nymphs were on, here is a wider shot:

160422_FY_011

It bloomed for a good month from mid-April until to mid-May:

160422_FY_016

The flowers are very small but up close they’re quite cheery.

Euphorbia antisyphilitica is a succulent native to northwestern Texas, southern New Mexico and wide swaths of northern and central Mexico. Its common name, candelilla, comes from candela, the Spanish word for candle. From Wikipedia:

Uses

The white sap of E. antisyphilitica was historically used in Mexico to treat sexually-transmitted diseases. Commercial harvesting of candelilla wax began at the start of the twentieth century, with demand greatly increasing during World War I and II. This industry largely disappeared following the end of World War II due to diminished candelilla populations and the availability of cheaper petroleum-based waxes.[3] Later on however, new uses were found for the wax mainly in the cosmetic and food Industries, and it is still being produced in northern Mexico and exported to other countries. See the candelilla wax article.

 

Cultivation

Candelilla is gaining in popularity as a landscape plant in parts of the arid southwest. It is popular for the following reasons:[4]

  • once established it needs little water other than rainfall in cities such as Phoenix or Tucson, Arizona making it good as a median planting.
  • Can survive in areas that have reflected light.
  • It grows best in well-drained soils but can tolerate some clay or limestone.
  • Is visited by butterflies although not commonly considered a "butterfly plant."
  • It is cold tolerant to 15 degrees F.
  • It appears not to be bothered by pests.
  • Can be grown in containers.

12 comments:

  1. I'm not fond of bugs in general but these are rather attractive in their red jackets (less so as adults). I've never seen them here, which is fortunate as we have several citrus trees. And, yes, the thought of having them in the house made me cringe.

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    1. I'm often amazed by the coloration on insects. Frivolous at first glance, but clearly necessary for evolutionary purposes.

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  2. Here's the adult Florida leaf-footed bug (Leptoglossus phyllopus)
    http://butterflies.heuristron.net/pictures/leaffooted/phyllopus/DSC07437.jpg

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    1. I see the adults regularly although I never knew what they were. I'm not too worried about them. Mealy bugs keep me busy enough...

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  3. Replies
    1. For sure. But then, a lot of critters do. Better not to look too close!

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  4. I don't mind the bugs we have here in the PNW as they're mostly smallish things. However, the thought of sharing the bed with these isn't a pleasant one.

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    1. You're right. I prefer not to share my bed with any insects :-).

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  5. Live and let live is a good practice most of the time with garden insects I think. I make exceptions for yellowjacket nests -- too scary -- and would probably do something if my prized edibles (like your lemons) were in danger. Love seeing the insect macro shots from you -- keep it up! :)

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    1. Yes, yellowjackets are a no go. Fortunately, they're rare here. Dunno why. We do have tons of bees, including very large carpenter bees, but they don't bother people.

      As for macro shots, they require a lot more patience than I usually have. But I promise to be better.

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  6. Excellent macro photos, even though the subjects are creepy (literally)!

    The candelilla is starting to show up in garden centers here. Nice plant, but it seems to spread pretty far? I saw some clumps in Phoenix that were 5 or 6' wide.

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    1. Candelilla does form clumps but I think it's easy to control by removing the new growth where you don't want it. I'll let you know next year :-).

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