216 SOUTHERN FIELD CROPS 



LABORATORY EXERCISES 



(1) Examine the tips of a number of ears of corn and make an 

 estimate of the percentage of ears injured in that field by the corn 

 ear-worm. 



(2) Make germination tests, preferably in the open ground, 

 of 100 weevil-eaten and of 100 sound kernels ; determine 



(a) the percentage of each that germinates, and 

 (6) the diiJerence, if anj-, in the size of the young plants 

 when a few weeks old. 



Literature 



BuHRELL, T. J., and Barrett, T. J. (Ear rots.) 111. E.xpr. Sta., 



Bui. No. 1.33. 

 Stevens, F. L. (Ear rots.) N. C. Expr. Sta., Rpt. 1907-'S, 



pp. 37-39. 

 Bishop, F. C, and others. (Corn ear-worm.) U. S. Dept. Agr., 



Farmer's Buls. Xos. 212 and 290. 

 Bowman, M. L., and Crossley, B. W. Corn (Diseases and 



insects), pp. 229-260. Ames, la., 1908. 

 Chittenden, F. H., and others. V. S. Dept. Agr., Bur. Ent., 



Circ. No. 59 ; and Kan. Board Agr., Dec, 1905, pp. 25S-264. 



