An Elementary Study of Insects by Leonard Haseman

Author:Leonard Haseman [Haseman, Leonard]
Language: eng
Format: epub
Tags: Insects
Published: 2007-11-09T16:00:00+00:00

Study and Observation

Observe the worms where they are at work on tomatoes. Disturb them and hear them grind their jaws together. Do they eat the foliage rapidly? Dust a little Paris green on the foliage where a worm is eating and see what happens in half an hour. Collect a number of the worms in a glass fruit can and give them tomato leaves to eat and watch them grow. How many segments are there to the body? How many of the segments have small black spots on either side? These are holes through which the worm breathes. Is the horn at the end of the body stiff enough to stick into your hand? This is thought to be a sting but it is only an ornament and is entirely harmless. When full grown they will burrow into the sand in the jar and change to the pupa.

Full-fed tomato worm slightly reduced.

Chrysalis or pupa of tomato worm. Note the jug-handle-like sheaths enclosing the proboscis.

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