64 INSECTS INJURIOUS IN 1902. 
is a root form and a branch form of this Louse. No artificial 
remedies are practicable. 
The Entomologist would suggest rotation of crops; also feed- 
ing affected stalks to stock before the Aphis has laid its eggs. 

Fig. 55.—Corn Plant Louse, much enlarged. 
For garden corn, kerosene emulsion, one part to twelve, will 
readily relieve the trouble. 
The Corn Louse is said to winter in the ground, and to pro- 
duce wingless generations on the roots. The farmer is urged not 
to plant corn on the same ground two years in succession if he 
is much troubled by this insect. This, of course, means rotation 
of crops, as suggested above. 
