Crittenden press. [volume] (Marion, Ky.) 1879-1907, 1903-06-25
The TOBACCO WORM.
Its Habits, and the Best Way Of
Removing II.

lege of Kentucky:
A knowledge of the life history
of this insect, and particularly Of
the number of bro DDS of worms
which appear each season, is of q
good deal of Importance in spray
ing, After gathering up all of my
notes for three years, find that
there is some evidence of three
annual broods, instead of two, as
has been thought to be the num-
Der through the South.
On June s, 1900, adult mouths
were captured by me at Lexington.
These probably represented the
adults from worms which went in
the ground and changed to pupa
in the fall of 1901. On July 3rd
nearly grown worm was taken
from a tomato plant in my garden
and on July 9th 1t had changed to
a pupa in the ground.
Young worms recently Matched,
have been observed on tobacco
July 3, 1901; July 8, 1901; July
IL, 1901; August 9, 1901, and Sep
TENDER 9, 1902.
Those observed during the first
half of July, probably represent
second brood, the first one devel.
oped on tomatoes or on some other
plant. The third brood would,
therefore, be the one which APP.
pears during early August and
does much Of the injury to tobac.
co. The young worms which were
noted by me last fall on the refuse
tobacco leaf after cutting, are pro
baby from occasional adults of
the third brood, which during the
long, mild autums, come out in fall
instead of spring. q took Sept.
Is, 1901, a moth just from the
ground and the wing not yet ex-
panded). Such young are liable
at any time to be destroyed by the
frost, and | think ordinarily they
do not become adult; still it is al
together probable that during
some of the exceptionally mild
fall and winter weather experien-
ced here some go into the ground !
to pass the winter.
To the grower the important
facts in this life history of the in. !
oect are the appearance of brood |
in early July, and another in ear
ly August
1t is not necessary to spray to-
bacco more than three times, pro-
vided the times of making the ap.
LEGATION are we'll chosen.
Judging by experience the pro-
per time to apply paris green is
early in July, and again in early
but extended experience
will probably show the broods to
vary somewhat in times of appear
ance with the season. The thing
to do, consequently, is to watch
the plants and apply the poison as
soon as the young worms begin to
appear. A third application may
be safely made about the middle
of August.
Use weak mixtures, even if you |
are forced to spray four times.
One pound of Paris green in 100 |
gallons of water is enough if ap. |
piled at the proper time, namely, |
when the worms are young. | !
should. not use more than one ID.
in 100 gallons, at any rate.
Where tobacco is grown on
large scale, it is economy to get
copper knapsack sprayer from
some maker or dealer of known
reliability, An "agitator" should
always be attached to the handle
of the pump.
To those who dislike to use par
is green on tobacco, the use of CO.
bait in the flowers of jimpson
weed is commended. 1t has stood
the test of experience now for for !
ty years at least, and is still in ia.
vor with growers. The best time
to use it is during August, when
the fly is most abundant. The