Deming graphic. (Deming, N.M.) 1903-1948, 1913-07-25
CONTROL OF THE HARLE-
0UIN CABBAGE-BUG

orca'lon this press bulletin by the
| New Mexico College of Agriculture
and Mechanic Arts and Agricultural
experiment Station at State College,
New Mexico:
This bug in the adult form is from
one quarter To unrhali an inch long
broad ~houdcred aud shield shaped
ana most vlvldly colorrd. but have no
wings. The eggs are barrel shaped
and have dark colorcd hoops. They
are -et on end IN rows on the under
rldr "i leaves. Each female LAYS
about 100 eggs and ouly from Two Ia
-Four weeks are necessary to produce
IdnIl bug from eggs.
TIA" adults of The last summer zen
riall"u winter over under crop rub.
b!rh left ~ field "r garden. ur IN at.
most amy shelter they find handy. be
r"mug active ~ early spring and
feeding un amy rrucilrrou~ (mu-tard
radl~h. etc" family plants they find.
Summer generations from these bugs
swell the numbers enormously and
they attack garden crops very Seri.
"u~lN, the cabbage, turnips. etc,
worst of all. They do their damage
by inserting the sharp bcak into the
plant TISSUES and sucking out the
Weather sufficiently cold in fall
Juices. causing the plants to die
drives them into shelter
From the above, control measures
should be- based upon preventing the
adult from living over winter aud
from laying eggs in the spring. To
do the former, clean up and burn the
crop remains IN the early fall as soon
rs crops are harvested. Thorough
blowing will then destroy the hiding
places. A small area Of some plant
they like well, late planted so as to
be green after the rest of the crop
is cleared off, or some late cabbages
left in the field will draw most of the
bugs and they may be sprayed with
twenty-five per cent kerosene emul-
sion or even pure kerosene, and so
killed in great quantities.
To get the bugs in the spring that
have Wlntrrcd over, Use similar
Trap coop that will make an early
growth in II given region. kalr
planted in fall, mustard in spring.
radishrS. etc.. are good These will
draw the bugs as soon as they begin
to feed in the spring and they may
he sprayed as above and killed be.
fore having had time to lay eggs for
the first summer brood. One bug
killed in fall or spring means thou
sands less in summer. 1t is well to
plant such trap crops in rows thru
the intended garden or field. If plant.
ed at different times, later planted
rows will serve to draw bugs after
the first rows have been sprayed, for
the spray kills plants as well as bugs
The adult bugs on crop plants are
very hard to kill and con not be
killed by spray with any great sue
cess without usually damaging the
plants. Whale-oil soap at the rate
of one and one-half to two pounds
to the gallon of water will kill the
adults on cabbage without any dam
age to the plants usually. The young
bugs may be killed with this solution
above. using half n pound to the gal
lon, or by spraying with Kerosene
emulsion, ten 10 fifteen per cent
strength.
To make the kerosene emulsion.
dissolve by boiling. one half pound
of hard soap in gallon of water :;
while this is still hot add two gal
Ions of kerosene. Pump back and
forth with hand spray--pump, or
churn otherwise, until the whole mass
is creamy throughoA;. This is abso-
lutely necessary. Free oil burns the
foliage. Any free oil that may be
left after the best emulsion you can
give may be poured off after the So
luton stands.
For ten per cent strength dilute Il
gallon of the emulsion above with five
and two-thirds gallons of water; for
fifteen per cent solution use three
and n half gallons of water instead.
Stir well before and while using.
Spraying alone where the insect
is on a crop is not to be depended
upon to control this insect. II is
only II last resort. The cleaning W
; measures and use of trap crops are
} TO be practiced for the best results
IN T. Morrill, Station Fntomolo-