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Bug of the Week: Summer Insect Eggs

The summer rains have finally started in the Sonoran Desert. With the rain comes new plant growth and with new plant growth comes insects.

gws-cicada-oviposition-147Studying the desert willow this morning, I noticed these small tears in the wood of some twigs. Any idea what caused it?

gws-insect-eggs-on-desert-willow-139Then I found these on a nearby desert willow leaf. Can you tell what they are?

close-insect-eggs-on-desert-willow-138Perhaps with a closer view?

Answers:

The splinters in the twig were caused by a cicada laying its eggs under the bark. The cicada nymphs will hatch out, fall to the ground, and feed underground on the roots until next summer.

The white eggs on the leaf are likely to be moth eggs. I will be watching the tree closely for the next few days to see if any caterpillars develop. We already have giant swallowtail caterpillars on the citrus, queen caterpillars on the rush milkweeds and tobacco hornworms on the datura.

Do you see more insects in rainy years than dry years where you live?

Mystery Seed of the Week: Seed Identification Resources

 I’m afraid I don’t have any mystery seeds in the queue this week.

If you’d like to polish your seed identification skills while you wait, try some of these online seed identification resources:

The University of Kentucky has seed identification information and quizzes that use common names. They are both educational and entertaining.

If you know your plants by their scientific names, you might find these quizzes at Ohio State University interesting:

Check out this free .pdf 4-H seed identification fact sheet – it is very well done.

Finally, if you are a serious student of seed identification, try the USDA-ARS guide to seeds and fruit by plant family.

Enjoy!

Do you have any seed identification resources to suggest?

Seed of the Week: Lemon Grass

Our mystery seeds from last week were from West Indian lemon grass, 
Cymbopogon citratus.

Too bad today’s post can’t come with a scratch-and-sniff component.

lemongrass-another-view-003

Lemon grass, although not related to lemons, has a lovely lemony scent. It is used in Asian cooking, particularly Thai, and also in teas.

lemongrass-plant-009

Both West Indian and East Indian lemon grass grow well in the Southwest because they are drought and heat tolerant. They are, however, frost sensitive and the brown ends may need to trimmed back after a cold winter. The plants do well growing in pots and can be temporarily moved indoors if necessary.

Lemon grass plants are easy to propagate. Many Asian markets sell lemon grass stalks, so look for some with the bulb and a few roots still intact. Simply stick the root/bulb part of stalk into moist soil for rooting. It is also possible to separate and move the stalks from an established clump of lemon grass.

lemongrass-going-to-flower-65

Depending on the species, the plants may periodically produce flowers.

my-lemongrass-flower-12The flowers are fairly inconspicuous, as with other grasses. Over time they turn reddish brown as the seeds form.

mystery-seed-257(The public domain photograph is by Jose Hernandez, hosted by the USDA-NRCS PLANTS Database)

Simply sow the mature lemon grass seeds into moist soil for new plants.

Before you know it, you will be catching the delicious citrus scent as you brush by the plant.

Have you ever grown lemon grass? What is your favorite recipe for using it?

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