334 Gardening 
the tomato and the potato. The stem soon wilts and 
dies above the place where the insect entered ; so one can 
tell when a borer isina plant. By slitting open the stem 
the insect may be found and destroyed early in its life. 
The seed-corn maggot burrows into the roots and stems 
of young plants, especially corn, beans, and cabbage, 
causing them to wilt and die. Pull up all infested plants 
and destroy the larvee. The methods advised for combat- 
ing the radish maggot may also be used for this maggot. 
The carrot-rust fly attacks carrots, celery, parsnips, 
and parsley, feeding in the tender roots and burrowing 
into large roots of older plants. There is no very gocd 
method of control, except perhaps that of growing the 
crop under a frame completely covered with cheesecloth. 
The European corn borer has recently been introduced 
into several eastern states, and there is danger of its 
spreading throughout the country. If it is not checked, 
it may become a serious enemy of the corn grower. The 
larve burrow into the stalks, ears, and even the seeds. 
As many as 311 borers have been found in a single hill of 
corn. Such a destructive insect should be vigorously 
fought, and its presence should be reported immediately 
to the state agricultural college, to a county agricultural 
agent, or to the Bureau of Entomology, United States 
Department of Agriculture, for instruction as to the 
best measure of control. 
BENEFICIAL INSECTS 
Not all of the insects seen in the garden are injurious 
to garden crops. Some are very helpful, for they feed 
