Along with our Tomato harvest past fall came some strange critter, the Horn Worm. After collecting 2 whole plastic cups full for kids show and tell around the neighborhood, I came across this huge specimen. Worth Posting. Meaty Tomato's with meaty Protein.Hosts: Primarily tomato but can also attack eggplant, pepper, and potato.
Description: The larval stage of this insect is a 3 1/2 to 4 inch long pale green caterpillar with 5 pairs of prolegs and a "horn" on the last segment. The two most common hornworms are the tobacco hornworm (7 diagonal white stripes and, most commonly, a red horn) and the tomato hornworm ("V" shaped markings with a horn that is often black). The adult of the tobacco Hornworm is the Sphinx moth. The Five-spotted Hawk Moth is the adult of the tomato hornworm. Both moths are stout-bodied, grayish-colored insects with a wing spread of 4 to 5 inches.
The larva is the damaging stage and feeds on the leaves and stems of the tomato plant leaving behind dark green or black droppings. Though initially quite small with a body about the same size as its horn, these insects pass through 4 or 5 larval stages to reach full size in about a month. The coloration of this larva causes it to blend in with its surroundings and is often difficult to see despite its large size. It eventually will burrow into the soil to pupate. There are two generations a year.
Recommendations: This insect is parasitized by a number of insects. One of the most common is a small braconid wasp. Larva that hatch from wasp eggs laid on the hornworm feed on the inside of the hornworm until the wasp is ready to pupate. The cocoons appear as white projections protruding from the hornworms body. If such projections are seen, leave the infected hornworms in the garden. The wasps will kill the hornworms when they emerge from the cocoons and will seek out other hornworms to parasitize. (Yuck)
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