UTAH ACADEMY OF SCIENCES 43 
describe it in brief. The description which follows is 
merely a compilation of descriptions taken from texts on 
the subject, following O’Kane. (O’Kane; Injurious 
Insects). 
The corn-root webworms are from 34 to 1 inch long 
when full grown, and their bodies have numerous low 
tubercles. They hatch from eggs laid by small, active 
moths which have the habit of resting on grass stems with 
their wings folded around their bodies. There are two 
generations annually, the moths of the second brood 
appearing in the latter part of summer. The worms feed 
in a silk tube more or less covered with particles of dirt. 
The outward evidence of attack is the stunted growth 
of the corn or the death of young plants. When the corn 
is pulled up the roots are matted in a web. 
Remedy: Fall plowing and cultivation will help to 
hold the pest in check, but to avoid injury corn should 
not be planted on land which has just been broken up from 
sod or weeds. Infected land should be fallowed during 
the latter part of the summer and should not be planted 
to corn the following year. 
TOMATO-BUD APHIS. 
History: As far as is known this insect was first 
determined during the summer. No literature has been 
found describing the insect to date. It made its appear- 
ance in Salt Lake City during the summer of 1917. 
Description: 'Tomato fruit is set from the flowers 
directly. Last summer the blossoms continued to drop 
from the plants and in many instances it was impossible 
for the fruit to set. After intensive study, a microscopic 
insect, which had the appearance of an aphis, was dis- 
covered on the plant. The insect seemed to work in 
groups of five or six sucking the juice from the lower 
stalk about 34, of an inch from the bud. This seemed to 
weaken the stalk sufficiently so that the bud dried up and 
dropped off. The winged aphis was discovered associ- 
ated with the infected portion of the plant. 
Remedy: Strongly fertilize the soil and give the 
plant an abundance of water. Nitrate of soda in the 
