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Bug of the Week: Agave Weevil

My son noticed a beetle on the sidewalk. For once, I wasn’t all that glad to spot an insect.

agave-weevil-good-furtherSee the long snout that is rather like an elephant’s trunk?  This insect is an agave weevil.

agave-plantBecause the adults don’t fly, it likely came from one of the agave plants in our yard.

agave-weevil-larva-paper-towelSure enough, when we dug around at the base of one of our agaves that was looking yellowed and wrinkly, we found some agave weevil larvae.

agave-weevil-larva-upside-down-mouthpartThe first thing you notice is that although they are legless, the larvae are able to move quite quickly. This one is upside down, so you can view where the legs should be. You can also see its mouthparts on the dark brown head.

agave-weevil-larva-111What are those paired structures at the end of the abdomen? This one has spiracles for breathing, which you can see as circles down the middle of the side. Once embedded in the plant, however, it is possible the larva uses those tubes at the rear for breathing. Other insects that live in wet soil have similar structures.

After studying the larvae, I have to admit I began to find them interesting. Sometimes my yard feels like an “outdoor laboratory.”

What did you find in your “outdoor laboratory” this week?

Mystery Seed of the Week 215

The bird probably dropped this plant into our yard.

mystery-seed-head-215The dried seed head looks rather like an old mop.

mystery-seeds-215-2When I opened them, I found these.

mystery-seeds-215-1What do you think? Are they the seeds?

vb-215Just to be sure, this is a photograph of the seeds of this plant by Jose Hernandez (hosted by the USDA-NRCS PLANTS Database).

Do you recognize what plant these seeds are from? If you choose to, please leave a comment with your ideas.

New mystery seeds and Seed of the Week answers are posted on Tuesdays.

Seed of the Week: White Leadtree

As Craig recognized, our mystery seeds last week were from the white leadtree, Leucaena leucocephala.

Leucaena leucocephala-earlier

Originally from Central and South America, the white tree has been planted throughout the world. It has been used for forage and wood.

Leucaena leucocephala-gggHere in Arizona it has been planted as a street tree.

Unfortunately the characteristics that make it attractive – being hardy and fast growing – also make it a potential weed. It is already on the invasive list in many countries.

Leucaena leucocephala -flowers

The leadtree produces many white, round flowers throughout the spring. They turn brown once they have been pollinated.

also called white leadtree

White leadtrees produce many seed pods, which can look messy hanging on the tree.

mystery-seed-pods-214Each of those bumps is a seed, stacked up in rows in the pod. One pod may contain up to 20 seeds.

white leadtree seedsThat’s a lot of new potential trees!

Do leadtrees grow where you live?

What do you think of them?

 

 

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