124 
WISCONSIN HORTICULTURE 
May, 1919 
Cabbage Injured by Striped Flea 
Beetles. 
L. G. Gentner. 
In some parts of the state these 
tiny striped flea beetles cause very 
serious injury to cabbage seedlings 
in the seed bed. Sometimes from 
25% to 65% of the seedlings ai’e 
either killed or made unfit for trans- 
planting, and it becomes necessary 
to ship in plants. 
Control Measures. — Flea beetles 
are not readily controlled by poi- 
sons but may be kept off the plants 
by thoroughly spraying these with 
Bordeaux mixture which is made 
up as follows: 
4 ounces Milestone, 4 ounces 
quicklime, 12 quarts water. Dis- 
solve the bluestone in a wooden or 
earthenware vessel, using hot water, 
and then add water to make 6 
quarts. Slake the lime by adding 
water a little at a time. When 
slaked make up to 6 quarts. Pour 
the two solutions together through 
a strainer while stirring and the 
spray is then ready to apply. 
Sometimes a combination of Bor- 
deaux mixture and lead arsenate is 
used. 
At times the flea beetles attack 
the seedlings as soon as they begin 
to push through the soil. In such 
eases sprays seem to be of little 
value and the only thing that can 
be recommended where this occurs 
year after year is to grow the seed- 
lings under a cheesecloth screen to 
keej) out the insects and remove 
this as soon as the beetles begin to 
disappear so as to harden up the 
plants. 
Destroy Plant Lice. 
Plant lice are small soft-bodied 
insects that occur in masses on the 
tender shoots of plants and on the 
under sides of leaves often curling 
these badly. They have tiny 
beaks which they insert into the 
plant tissues and with which they 
suck the vital juices, often dwarf- 
ing and stunting the plants or kill- 
ing them entirely. 
Plant lice may appear on the 
plants early in the season and con- 
tinue to multiply rapidly through 
the summer. 
Poisons will not kill plant lice. 
One must use a contact spray which 
actually touches them. The stand- 
ard treatment is a 40% nicotine 
sulfate at the rate of % pint to 50 
gallons of water to which two 
pounds, of soap, dissolved first in a 
gallon of water, have been added. 
For small amounts use one tea- 
spoonful nicotine sulfate and an 
inch cube of soap to each gallon of 
water. 
Important. — It is best to spray 
before the leaves curl badly. The 
spray must actually touch the in- 
sects in order to be effective, and 
should therefore be forced well 
into the curls and up under the 
leaves. A nozzle placed at an 
angle to the rod is the best. Any 
plant lice skipped by the spray 
continue to multiply. It may be 
necessary to make a second appli- 
cation. One may also steep one 
pound of tobacco leaves or stems 
in four gallons of water for an hour 
and apply this, or one may use fish 
oil or laundry soap at the rate of 
one pound to 8 gallons of water. 
L. G. Gentner. 
Control the Currant Worms. 
What the Insect Looks Like. — 
Wherever currants and gooseber- 
ries are grown they are troubled 
with one of our most common gar- 
den pests, the imported currant 
worm. The adult of this insect is 
a saw-fly, not a true fly but a form 
having four wings. The female is 
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Dept. D, Cumberland, Wis. 
/f 
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= OSHKOSH SEED COMPANY = 
EE Dept. D. Oshkosh, Wis. E 
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