91 



of a corn plant as soon as the first signs of attack are 

 observed. Paris green and lime have been tried for this 

 purpose, but they very often injure the leaves of the corn. 

 A mixture of 1 teaspooonful of Paris green and 1 quart of 

 corn meal has been found useful. A small quantity of 

 this mixture is applied in the middle of the rolled-up 

 leaves ; it is eaten by the caterpillars and does not seem to 

 injure the plant. 



Fig". 101. Cotton boll worm. 

 Showing mode of attaching <>ar of corn. (From U.S. Dept. Agric.) 



Early planting is said to be of advantage in this con- 

 nexion, as in this case the corn is very rarely attacked to the 

 same extent as when it is planted late. 



Guinea corn is also attacked by small grey moths which 

 infest the ripening heads of grain, sometimes completely 

 spoiling them. This form of injury has been reported from 

 Nevis in an experiment plot containing a very close-headed 

 variety of Guinea corn. The only method of prevention in 

 such a case as this would be the cultivation of a kind with a 

 very open head. 



