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Ill. THE RASPBERRY SAW-FLY.* 

Monophadnus (M onophadnoides Ashm.) rubi Harr. 
Order Hymenoptera; family TENTHREDINID2. 
———— 
V. H. Lowe. 
———_____—_ 
SUMMARY. 
During the past two years the raspberry saw-fly has done serious - 
injury in certain localities in the State. The adult insects appear 
at about the time the leaves begin to expand. The eggs are placed 
just beneath the under cuticle of the leaf by means of the saw-like 
ovipositor with which the female is provided. The leaf tissue 
above the eggs becomes lighter in color, so that a leaf in which 
several eggs have been deposited has a spotted appearance. The 
larvee are green in color and are covered with spine-bearing tuber- 
cles. They feed voraciously upon the leaves and may occasion- 
ally attack the tender bark of the new growth, the flower buds 
and the young fruit. Pupation takes place under ground, the 
larvee forming oblong cocoons of a few coarse strands of silk 
together with a glue-like secretion mixed with particles of earth. 
The larve remain all summer and until the following spring in 
the cocoons, slowly changing to the pupa state. There is but one 
brood annually. | 
Experiments showed that the larve can be successfully checked 
either by brushing them off from the bushes to the loose soil be- 
tween the rows or by spraying with hellebore, 1 ounce to the 
gallon of water. The latter method was found to be most prac- 
tical especially in large fields. | 

* Reprint from Bulletin No. 150. 
