CURRANT INSECTS 79 



pupa and in the last part of May the adults appear; 

 the f emale^ makes a hole in the tender branch with 

 her ovipositor and then deposits her egg; she then 

 girdles the branch about one inch above the egg; 

 this she does in an interesting way with her oviposi- 

 tor; the end of the stem wilts and falls over; the 

 larva burrows down the stem going 6 or 8 inches 

 by fall ; it then spins a cocoon at the lower end and 

 passes the winter. 



Control — As soon as the wilted tips of the canes 

 are seen in the spring they should be cut off 4 or 5 

 inches below the girdled 'place and burned. This 

 will destroy all of the eggs. 



Tpie currant motii-borer '^ (Scsia tipiiUfonnis) 

 Order — Lepidoptera 



This is a beautiful clear-winged moth like the 

 peach-tree borer ; it is another imported pest and is 

 said to be, in some localities, a serious one. 



The eggs are laid on the stems in the axils of the 

 leaves; the young larva bores into the stem and 

 gradually tunnels out a burrow down the center as 

 it grows ; the larvae become half grown by fall and 

 pass the winter in their burrows; in spring they 

 complete their growth and pupate; the moths ap- 

 pear in June. Affected stems produce small yel- 

 lowish leaves and are soon broken oft' by the wind. 



Control— Infested stems should be cut off be- 

 low the lowest part of the tunnel and burned. 



The currant aphid ^^ (My::its ribis) 

 Order — Hemiptera 



The small black eggs of the aphid are found on 

 the stalks in winter and hatch just as the foliage 



" Lugger— Minn. Expt. Stat. Bull. 43, p. 184. 

 "Lowe— N. Y. State Expt. Stat, Bull. 139. 



