93 
Illinois, and has been found in a majority of the greenhouses of 
the state, tho not always in sufficient numbers to damage the crops 
seriously. Its worst injury is the eating of the flower-buds (Fig. 
7). It feeds at first, however, on the parenchyma of the leaf, 
concealing itself by folding the leaf or by tying several leaves to¬ 
gether with fine silken threads (Fig. 8). 
Besides the rose it often injures apple and many other plants 
of the rose family, as well as aster, carnation, clover, gooseberry, 
currant, cotton, etc. 
LIFE HISTORY 
The yellowish green eggs are laid in compact masses of 35 or 
more on the upper surface of the leaves (Fig. 9, 10). The young 
larvae feed on the leaf tissues at first, but later may eat the flower 
petals, and often eat into the center of the bud. When fully 
grown (Fig. 11) they pupate within a folded leaf or in the bud, 
and two or three weeks later emerge as adult moths, which usually 
remain concealed during the day, and become active at night. They 
deposit eggs on the leaves for a second generation, and soon after- 
Fig. 9. Rose Leaf-roller, Archips rosaceana; two egg-masses on rose 
leaves. 
