Читать книгу A Guide for the Study of Animals - Worrallo Whitney - Страница 48

1 What is the general size and appearance of the various scale bugs in your collection? How do they differ in form and size and color?

2 Remove a scale and study it carefully with a lens. What is under the scale? Of what is the scale composed? What do you discover about these bugs to indicate that they are really insects?

3 What can be said about the number of scale bugs? Why are they difficult to exterminate? How can they be distributed from one place to another, as from orchard to orchard, since only the males have wings?