Pollination in Orchards. 



377 



varieties are best adapted for pollinating self-sterile sorts. Waugh 

 and Kerr have studied this point with native plums for several years 

 and their judgment is united in a table of recommended pollinizers 

 for plums (12th Report Yt. Ag. Ex. Sta.). A few results from 

 crosses made at Ithaca in 1899 will illustrate this point. Fig. 81 

 shows tlie comparative size of Seckel when pollinated with Kieffer 

 and with Lawrence pollen. Clapp pollinated with Kieffer was also 

 larger than Clapp pollinated with Lawrence or Louise Bonne. 

 Howell blossoms which received the pollen of Clapp gave fruits of 



81. — Seckel. From Kieffer pollen above, from Lawrence pollen below. 



nearly twice the size of those which received Bartlett pollen. Bart- 

 letts crossed with Angouleme were larger than Bartletts crossed 

 with Sheldon. In some cases no difference could be noticed, yet 

 most of our standard commercial varieties will be likely to yield 

 enough better fruit when planted with some varieties than with 

 others, to make a study of this point worth the while. 



Some of the combinations which have been very successful in the 

 commercial orchards of the country are : Bartlett with Nelis, 

 Flemish Beauty, Easter, White Doyenne ; Idaho with Bartlett ; 



