The RURAL NEW-YORKER 
797 
The Striped Cucumber Beetle 
What is flu* best method of controlling 
the striped cucumber beetle that is sup¬ 
posed to he the cause of mosaic or white 
blight of the pickle plant? K. s. s. 
East Northport, N. Y. 
The striped cucumber beetle has been 
proved to be a carrier of the organism 
that causes the bacterial wilt of cucum¬ 
bers, melons ami squashes, and it has also 
been shown that the beetle acts as a dis¬ 
seminating agent of the mosaic disease of 
these plants. This pernicious insect is 
therefore trebly injurious, because in ad¬ 
dition to carrying the two diseases men¬ 
tioned, and distributing them from plant 
to plant, it attacks and destroys the 
plants themselves, and is most persistent 
in its work. 
AVithin the last year or two experi¬ 
mental work has demonstrated that this 
beetle can be controlled most effectively 
with nicotine (tobacco) dusts. The 
writer was unexpectedly successful iu 
controlling the beetle on cucuinbegs last 
year with a two per cent nicotine dust. 
I could not determine that the dust ac¬ 
tually killed the beetles, for I did not find 
any dead ones about the vines. They 
were, however, very effectually repelled 
and driven away by the dust, and the 
plants were very satisfactorily protected 
by two applications. 
Eater experiments in Missouri show 
that the beetles are actually killed by a 
four per cent (pure) nicotine dust, and 
this strength is recommended for the con¬ 
trol of this insect on melons. One man 
with a good hand duster should be able 
to treat S(K> or 1,000 hills an hour, and 
1 lb. of dust will cover - 300 ' ills of 
melons, when the plants are showing 
about three leaves. As the plants in¬ 
crease in size more dust will be needed. 
From two to three applications of the 
dust will be necessary to insure the best 
protection. Incidentally the melon aphid 
which may infest the plauts will also be 
Controlled by the dust. In fact, this 
aphid can be very satisfactorily con¬ 
trolled with a two per cent nicotine dust. 
In order to obtain this dust, which con¬ 
sists of lime and nicotine or sulphur and 
nicotine, properly mixed, it should be 
purchased of the manufacturer, who lias 
the correct machinery for mixing it. 
One of the best dusters that we know 
of is of the bellows type. It is easy to 
operate, has a flexible delivery tube, and 
can he adjusted to deliver a large or 
small quantity of dust. 
OLBNN W. llhlUUOK. 
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