- 24 - 
Phipps, C. R. 
1930. Blueberry and huckleberry insects. Maine Agr. Expt. Sta. Bui. 
356, pp. 107-232. 
p. 116: In conclusion, then, the investigations thus far 
have shown: (1) that various species of insects, esp ecially_h oney-be es, 
bum ble-bees and ot h er bees^. collect blueberry pollen : (2) that such in- 
sects undoubtedly exert a marked influence on blueberry pollination 
since their exclusion affects yields so strikingly. 
Cherry 
Lagasse, F. S. 
192S. Proper pollination of fruit blossoms. Del. Univ. Agr. Ext. 
Bui. 15, 20 pp. 
p. 10: The experimental results obtained in different sections 
of the country on the sour cherry with respect to its self-fertility 
do not entirely agree. The majority of evidence, however, indicates 
that most varieties will set commercial crops thru the use of their 
own pollen. Shoemaker ... has recently shown that the set of Mont- 
morency is increased under Ohio conditions by the use of early Richmond 
pollen, but it is doubtful whether the increased set will compensate 
for the space occupied by the trees of the inferior pollinating variety. 
Interplanting of several varieties, better cultural practices, and the 
placement of be_e_g_ in the_sou.r_cher ry orchard is r e commended for in - 
cre asing; the set of fruit . 
Schuster, C. E. 
1925. Pollination and growing of the cherry. Oreg. Agr. Expt. Sta. 
Bui. 212, 40 pp. 
p. 23: With fruit so dependent upon cross-pollination as are 
cherries, the agents responsible for this transfer of pollen need 
to be considered. The number and presence of wild insects can be 
controlled very little, but the honey-bee can be controlled to a 
great extent. It is becoming the practice for cherry growers either 
to keep their own bees or to hire stands of bees during the blooming 
season. One hive to one or two acres of cherries is sufficient if the 
stands of bees are strong. 
The sour cherry may be self-sterile, self- fertile, or partly 
self-fertile, depending on the variety. 
Tufts, W. P., and Philp, G. L. 
1925. Pollination of the sweet cherry. Calif. Agr. Expt. Sta. Bui. 
385, 28 pp. 
p. 26: Pollinizing agencies, such as honey bees, are necessary 
to set a good fruit crop. 
