DISEASED LEAVES OF EGYPTIAN COTTON 
Plant-louse leaf-curl or hybosis, on Egyptian cotton, causing different degrees of 
distortion through shortening of the principal veins and crumpling or buckling of the 
web of the leaves but without mutilation or perforation, none of the leaf-tissue 
being killed. The effect of leaf-curl is to retard temporarily the growth of the 
plants, which recover completely when conditions become favorable for rapid 
growth in warm weather. Natural size. (Fig. 6.) 
