THE CELERY TREE-HOPPER. 37 
A number of other methods have been used with more or 
less good results. By attracting the winged insects with a 
light many can be destroyed; hence a brightly burning torch 
is slowly carried at night along the rows of vines, which are 
at the same time disturbed to start the leafhoppers. An- 
other plan is to carry a shield covered with a sticky sub- 
stance between the vines during the hottest part of the day, 
and thus catch the insects that have been driven off the plants 
by beating these lightly with a stick. 
THE CELERY TREE-HOPPER. 
(Cicadula 4-lineata Forbes). 
During the early part of July a small tree-hopper resemb- 
ling that found on the grape-vine, but very much larger, was 
doing considerable damage to the celery 
plants in the vicinity of the Twin cities. 
As the injury did not seem to be very 
widespread and as the insect is probably 
to be controlled by the same remedies as 
is the grape-vine hopper, it was not 
thought best to carry on very extensive 
experiments with it until the success of 
the experiments on the latterinsect could 
be determined. Raupenleim was tried as 
a repellant, but the results were not sat- 
isfactory. Probably the bestremedy is a 
spray with thetobacco-extract described 
in the article on the grape-vine tree- 
hopper; this, while it would injure the 
sale of the celery if applied late in the 
. season, would probably prove very ef 
Fig. 20.—Celerytree-hop- ffectual earlier and before the plants are 
per. Enlarged. Original. +44 far advanced. The culprit, which is 
a rather handsome insect, is illustrated in fig. 20. It is of 
a bright green color, marked with a few black spots upon 
the head, the under-side of which is illustrated to show the 
sharp and pointed beak which is inserted into the tissue of 
the plant to abstract the sap. Plants infested by many 
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