THE BREEDING OF CORN 



209 



The following diagram and quotation (Conn, Exp. Sta., 

 ;3ul. 168) illustrate the method to be used: 

 Plat 1. Plat 2. 





C D 

 Fig. 39. - 



D 



D D D D 



D 



■ Diagram showing method of producing cross-bred 

 seed of corn. , 



"Plant the varieties in alternate fows in Plat 1, all of 

 one variety as C being planted in the odd rows and the 

 other variety, D, in the even rows. Detassel all of one 

 variety as D. This detasseled variety should be also grown 

 in another isolated plat, Plat 2. Suppose it is determined 

 to use D as the female variety, detassel all of D. The 

 following results 'will then be obtained at harvest: 



Plat 1. D will be cross-ppUinated. 



Plat 1, C will be self-pollinated or close-pollinated. 

 'Plat 2, D will be self-pollinated or close-pollinated. 



"The detasseling should be done before any of the 

 pollen is shed and may be very easily accomphshed by 

 taking firmly hold of the young tassel and giving it a 

 steady upward pull. In order to detassel all of a variety 

 it will be necessary ^to go over the field several times at 

 intervals of a day or two. It is important to have all of 

 the variety detasseled before the shedding of its pollen. 



