pic of hornworm with wasp eggs

iamvillanueva(5 KS)September 4, 2008

After much searching for the name of the worm on my tomato plants, I was convinced that I didn't have the hornworm. What I read said that the wasp lays it's eggs inside the worm and the insects eat their way out of the worm. Well, what I found on my plants appeared to be eggs laid on the back of the worm, not inside.

Anyway, I kept searching and finally came across this pics which looks very close to the worms on my plant. I just thought I'd share. I've only seen these hornworms with eggs. I guess I have hornworms, just like the rest of you!

http://hortipm.tamu.edu/pestprofiles/beneficial/parawasp/tomhorn.html

AV

Here is a link that might be useful: hornworm with eggs pic

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rhizo_1 (North AL) zone 7

The eggs ARE inserted into the caterpillar. What you are seeing are the pupal cocoons, where the hungry little larva pupate into another adult wasp. This process starts after they have eaten the caterpillar from the inside. Once the development is complete, they'll emerge from the cocoon and fly away.

    Bookmark   September 4, 2008 at 2:14PM
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iamvillanueva(5 KS)

So strange! I wonder how the hornworm can still be alive after having been eaten from the inside out. Doesn't sound very pleasant to have to live thru. I wonder if the hornworm is in pain?

    Bookmark   September 4, 2008 at 2:24PM
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coolbythecoast(10b)

Concerning the ability of insects to feel pain, I read that they cannot feel pain as humans do.

Pain as we experience it is based on our nervous system. We have special nerve cells called "nociceptors" whose sole purpose is to create the sensation of pain. Without those special cells, we wouldn't feel pain. Stroke victims often lose the ability to feel pain if these cells are damaged.

Insects and other arthropods don't have any nociceptors. They can feel sensations, but pain is definitely not one of them.

In addition an insect's nervous system is directly connected to the muscular system, and not to the central cortex, their rudimentary substitute for our much more complex brain.

If the 'proof is in the pudding' one can observe that an insect that loses a leg will calmly limp away which certainly would not be the response for humans or other vertebrates.

I do believe that humans have a tendency to be Anthropodenial, including the egocentric belief that humans are 'special' and no other animal could possibly suffer the way that we do. But is this case it appears to be true.

    Bookmark   September 20, 2008 at 7:29AM
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jannie(z7 LI NY)

I remember studying Biology in tenth grade, there is another big difference betwen insects and humans. They have their skeletons on the outdside,called exoskeletons ,while our are on the inside of our bodies, under our skin. . Oh, and our central nervous system is inside our spinal bones. Not sure if it's important, but I'm sure insects don't feel pain as we do. I don't feel guilty when I squash insects and spiders I come across in my garden. Yes, I know I should leave spiders alone, they are good guys.

    Bookmark   September 21, 2008 at 8:55PM
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eaglesgarden(6b - se PA)

Spiders CAN be good, but some of them can also be bad. I have Wolf spiders, and they bite humans. I kill them, even though they also kill pests.

The bites aren't dangerous, but they are itchy/painful.

    Bookmark   February 9, 2009 at 4:57PM
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