June, 1921 



mains to be determined by further tests. 



Resistance to gummosis is variable. 

 Several of the better seedlings have rec- 

 ords showing almost complete freedom 

 from the disease, while others are very 

 susceptible. 



The surprising feature of the experi- 

 ment has been the relatively large num- 

 ber of trees that have produced fruit 

 of medium or excellent quality. Only 

 those of excellent quality have been re- 

 tained. One of those kept for further 

 tests bears fruit as large as that of the 

 Bing variety, but ripens at the same 

 time as the Black Tartarian. Another 

 one of the Napoleon type, but larger 

 than the Napoleon, ripens from a week 

 to ten days ahead of the Napoleon. The 

 last one to ripen is just taking color 

 when the Lambert is ready to pick. Can- 

 ning tests by the horticultural products 

 section have demonstrated the adapt- 

 ability of several varieties for the can- 

 ning trade. 



With all of the seedlings the question 

 of inter-sterility ot inter-fertility and 

 the annual production of fruit per tree 

 remains to be tested out. Unless a seed- 

 ling, after being carried through all 

 the tests, is unquestionably of much 

 greater value than any other variety 

 now in cultivation, it will be discarded. 



BETTER FRUIT 



Page 13 



Cross Pollination 



By A. F. Gillette, Oregon Agricultural 

 College 



CROSS pollination of bartlett pears 

 is proving to be of great benefit to 

 pear growers in California to increase 

 the set of fruit and to decrease the 

 amount of June drop. 



A series of experiments carried on at 

 Davis, Grass Valley and Vaca Valley, 

 by the department of horticulture of the 

 University of California, show that 

 cross pollination is beneficial in every 

 case, although soil, altitude and climat- 

 ic conditions seem to bear some relation 

 to the amount of fruit setting. 



The Bartlett pears in some of the 

 valley districts seem to be self fertile, 

 but in all cases where they are cross 

 pollinated with some other good com- 

 mercial variety they 'have a larger per 

 cent of fruit set and lose a smaller pro- 

 portion due to June drop, besides pro- 

 ducing a better quality of fruit in most 

 cases. 



Due to its long blossoming season in 

 California — March 15 to April 20 — and 

 to the inter-fertility of all pear vari- 

 eties with it, Bartletts can be crossed 

 with most any variety except a few 

 early bloomers as Anjou and Kieffer. 

 The best results were obtained with the 

 Winter Nelis and Cornice. 



In setting out a Bartlett pear orchard, 

 especially in California, one should con- 

 sider the point of planting interacts 

 of good cross pollinators. 



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