24 
THE COLORADO EXPERIMENT STATION 
fly. The eggs are deposited, one in a place, under the epidermis 
of the leaves. 
Remedies .—The best remedy for this pest is white hellebore (9) dusted 
lightly over the foliage in the evening. If this is carefully done, nearly 
every larva can be found deadunder the bushes next morning. Arsenical 
sprays (3-8) may be used either dry or in water, as for other leaf-eating 
insects. These poisons should not be used before the currants are 
picked. Pyrethrum (22) may be safely used at any time. 
THE CURRANT AND GOOSEBERRY FRUIT MAGGOT 
(Epochra canadensis). 
A two-winged fly about the size of an ordinary house fly, but 
yellowish brown in color and with dusky bands across the wings, 
appears among the bushes when the berries are about half grown 
and “stings” the fruit with its sharp ovipositor. In each puncture 
an egg is deposited just beneath the skin as shown at <?, and the 
punctured spot turns dark as shown at #, Fig. 14. 
Fig 13.—Adult of Curraan tnd Gooseberry Fruit-maggot. 
The eggs soon hatch into little white maggots that eat into 
the seeds and cause the berries or currants to turn red and drop. 
When fully grown, the maggot leaves the fruit and works its way 
beneath the surface of the ground where it stays until the next 
summer when it comes forth again as a fly to lay eggs upon the 
next crop of gooseberries and currants. 
Remedies .—Insecticides are useless here. If the stung fruit could be 
gathered and destroyed everyday or two, there would be fewer flies. 
