73 



2.^Heads shrivelled and blighted, and imperfectly filled, with the presence 

 of orange-colored maggots. — Wheat fVBcdge (Diplosis tritici). 



3. Heads covered with green plant lice. — Grain louse (Nectarophora 

 avenae). 



INSECTS INJURING CLOVER AND ALFALFA 



(Consult Bui. 134 Illinois Agric. Exper. Station, 1909.) 



The Clover Root-borer— (Riley) . 



The Roots :- 



(a) Second year plants wilt and die, and break off easily at the crown. Alain 

 root tunnelled and occupied l;y white footless grubs or little dark brown 

 cylindrical beetles. — Clover Root Borer (Hvlastinus obscurus). 



(b) Plants wilted and leaves die, mealy bugs near crown of root. — Clover 

 Root Mealy Bugs (Pseudococcus trifolii.) 



The^Stems:- 



(a) A long burrow with brown discolored walls in the pith of the stem 

 which falls to the ground prematurely. — Clover-Stem Borer (Languria 

 mozardi) 



