$5,000,000 to $10,000,000.

The boll-worm is chiefly destructive in the Southwest and does damage to
the extent of $12,000,000.

All in all no article of commerce is more seriously affected by insect
ravages than cotton, on account of its necessity, and the fact that it
can be raised only in certain regions.

Tobacco is one of the principal crops in several states and it suffers
heavily from insect damage. The large, showy tobacco-worm and the tiny
tobacco-thrips cause serious injury to the leaves.

Sugar-cane has its insect enemies which take on an average one stalk out
of every ten raised in this country, and reduce the crop in the same
proportion.

The cranberry is another valuable commercial plant that has been greatly
affected by an insect known as the cranberry fruit worm, but by
spraying, growers have been able to reduce the damage from sixty per
cent. down to fourteen per cent.

Garden vegetables suffer more than anything else from insects. Potatoes
are attacked by two species of insects, both destructive unless held in
check. One is the reddish brown blister-beetle. The eggs are laid on the
ground, and do not become adult insects until the second year. The other
is the striped Colorado beetle, the eggs of which are laid on the under
side of the leaves, and develop into adults in a short time. Two broods
of this beetle develop in a single season. Thus it may be seen that the
two are entirely different, though they are often supposed to be the
same. The Colorado beetle, by the immense damage it was doing to a
necessary food crop, first led to a regular method of fighting insects
in this country. This potato-bug is not feared as it was in the past,
since farmers have learned to control it in a great measure, but they
have only been able to lessen the evil, never to drive it out
completely.

Other insects that destroy garden vegetables are the well-known green
cabbage-worm, the harlequin cabbage-bug, the cabbage hairworm, the
asparagus-beetle, the squash-bug, the squash-vine borer, the striped
cucumber or melon beetle, the melon aphis, the corn boll-worm, the
cornstalk borer and many others.

In addition to these insects that attack special plants, all vegetables
are preyed on by the grub-worm, the cutworm, the aphis and various tiny
hoppers.

The grub-worms which work about the roots of plants are, in the adult
state, the June-bugs or cock-chafers which fly about our lights in the
spring and early sum