10 APPLT-ROOT BLIGHT — REMEDIES. 



tip, basal portion gently curved, the remaining part straight, its apex nearer 

 that of the third than that of the rib vein, about the same distance from the 

 apex of the rib vein that the apex of the third vein is from that of the second. 

 Marginal vein robust and black from the base to the stigma, very slender and 

 black along the outer margin of the stigma, slender and brown from the stig- 

 ma around the tip of the wing aud along its inner margin to the apex of the 

 first vein, thence robust and black, gradually becoming brown towards the 

 base, stigma dark smoky brown, oblong, its opposite sides nearly parallel, 

 abruptly converging to an acute point at each end, the basal end more acute 

 than the apical, and slightly attenuated. Lower wings more clear and hyaline; 

 marginal vein and Suter filament of the rib vein pale brown, inner filament 

 black and very gradually diverging from the outer, both filaments undulated 

 beyond the base of the second vein; the two discoidal veins blackish, the first 

 slightly undulated, its apex the same distance from the apex of the second that 

 this is from that of the inner filament of the rib vein. 



^.n abnormal variety has fallen under my notice in one instance, in which the 

 apex of the fourth vein of the right wing was slightly forked. 



When a tree ceases to grow with its usual vigor, and its leaves 

 are of a paler and more yellow hue than usual, and no borers in 

 the trunk, or other obvious cause of disease can be discovered, 

 the presence of this blight upon its roots may be suspected, and 

 the earth should be removed from them sufficiently to ascertain 

 whether excrescences such as have been above described are 

 formed upon them, and if discovered, it will be well to clear 

 away the earth from around them as much as can conveniently 

 be done, and pour strong soapsuds upon them, that it may satu- 

 rate the crevices in the excrescences, for there isjittle doubt that 

 every insect that is reached and wetted by this solution will im- 

 mediately perish. And ashes should be freely mingled with the 

 soil with which the roots are covered. It is probable that by a 

 resort to these measures an affected tree can in most instances be 

 cured. 



It is chiefly in nurseries, upon the roots of young trees taken 

 up to be transplanted, that the blight will be detected. In con- 

 sequence of it thousands of trees in our country have undoubt 

 edly been thrown away. But there is probably no necessity for 

 rejecting such trees. If the root be dipped in soapsuds, unless 

 the lice upon it are a muchharJier race tham their kindred which 

 dwell upon the leaves and twigs of trees, they will at once be 

 destroyed, and such trees may then be set out w r ifh as much 



