68 
One of the best forms of bait to be used consists of slices of potatoes 
or other ^'egetables poisoned in the same manner as advised in the 
consideration of cutworms. 
MISCELLANEOTJS ROOT-INFESTING INSECTS. 
In addition to white grubs, wireworms, and root-lice, which have 
been treated as invading the underground portion of beets, a few 
other species are found at the roots. Prominent among such are the 
seed-corn maggot and the clover-root mealy-bug. A number of com- 
plaints have been made of injury by insects which lead to the belief 
that the seed-corn maggot is frequently found on beets, although 
instances which could be positively traced to fhis species are com- 
paratively few. 
THE CLOVEIl^ROOT MEALY-BUG. 
[Dactylopius irifolii Forbes.)" 
This species, as its common name indicates, is better known as an 
enemy of clover, on the roots of which it feeds. In 1901, however, it 
appeared in considerable numbers on sugar 
beet in Michigan, the smaller stunted roots 
being invariably infested. Injur 3^ was most 
apparent in June. The female mealy-bug- 
measures a little more than one-twelfth of an 
inch in length, is reddish brown, and covered 
with a waxy or mealy secretion. The legs are 
dirty yellow, and from the sides project in the 
J ^"^^ manner usual to this group 15 to IT waxy fila- 
FiG. 63.~Dactijiopius citri: fe- mcnts, the shortcst being near the head and 
male— enlarged (Division of, i.i x -i ^- ^u- j 
Entomology). the longcst near the tail, sometimes one-tnira 
as long as the body. It is related to the scale 
insects and is of similar appearance to the species shown in figure 63. 
Remedies. — The same methods of control that have been prescribed 
for root-lice would operate against the present species, with about the 
same results. 
THE SEED-CORN MAGGOT. 
( Pegomya fiisciceps Zett. ^ ^ 
Beet roots are subject to attack by the above-named species of 
root maggot. During November of 1902 we received complaint of 
what was with little doubt this insect from Colorado, where it was 
breeding in rot-infected roots, apprehension being expressed that 
f'Syn: Coccus irifolii Forbes; Mth Report State Eiit. 111. for 1884 (1885), pp. 72-73; 
Pettit: Bui. 200, Mich. Agr. Exp. Sta. for 1901 (1902). pp. 193-194: Davis: Insect 
Life, Vol. YII, p. 172. 
^See Bui. 33, n. s., Div. Eiit., pp. 84-92, for syuonyiuy, bibliography, etc. 
