SAWFLIES INJURIOUS TO ROSE FOLIAGE. 
Witit1amM MIppLeTon, Scientific Assistant, Forest Insect Investigations. 
CONTENTS. 
: Page. Page. 
Three common rose slugs and their He scOUued, TOSEWOrRM. = =_- — 2. 2a 1123 
PeTTEtRE OTT <> ) e  e  e 3 How to control the rose slugs and 
inueebrmstiy, rose slug_—-—— = 4 protect the’ follages=2= ==. -- =» 138 
9 
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The Huropean rose slug -____------ 
THREE COMMON ROSE SLUGS AND THEIR OTHER 
FORMS. 
M OST varieties of roses, especially climbers, hybrid perpetuals, 
and hybrid teas, are subject to the attack of insects which feed 
upon the leaves, giving the bush an unsightly appearance and lessen- 
ing its vitality. 
The commonest of these pests belong to the group of insects which 
in the adult form are termed “sawflies,” or in the immature stages 
- are often spoken of as “ false caterpillars.” The adults have received 
the name “ sawflies” because the egg-laying apparatus of the female 
more or less resembles a saw and is used to cut slits or pockets in 
the plant tissue in which the eggs are placed. The larve are spoken 
of as “false caterpillars” because, although they resemble cater- 
pillars, they produce adults radically different from moths. 
The rose sawflies, in common with all insects of the group, have 
four phases which differ in appearance and it is during only one of 
these that the species is injurious. The first phase is the egg; the 
second is the feeding, growing stage, the larva, which is wormlike 
or caterpillarlike; the third phase is the resting, nonfeeding stage 
during which the wormlike creature in a case or chamber changes 
gradually to a form resembling the adult but lacking free-moving 
wings and legs; from this helpless pupa the adult emerges and 
freeing itself from the confining cell is ready to perform its part in 
the life cycle by laying eggs and perpetuating the species. 
The adult stage of the rose sawflies offers no opportunity for con- 
trol and because it is seldom associated with the damage done by 
the larva is not discussed in this bulletin. The other stages, however, 
offer satisfactory means of identifying these insects, and since it is 
during these immature stages that the damage is done or that control 
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