- 20 - 
Philp, G. L., and Vansell, 0. H. 
1932. Pollination of deciduous fruits by bees. Calif. A«rr. Col. *bct. 
Cir. 62, 27 pp. 
p. 4.: The fruit grower has a pollination problem with almonds , 
cherries, plums and prunes, apples, pears , and berries. In general, 
apricots, peaches , and walnuts set well with their own pollen and 
hence present no difficulties from this standpoint. The J. H. Hale 
peach, however, is self-unfruitful and must be interplanted with 
some other variety. Recent studies indicate that some varieties of 
walnuts in certain years do not mature the standnate and pistillate 
flowers at the same time and therefore, under these conditions, can- 
not pollinate themselves. 
p. 5: Bees are the most important insects for this work. The 
grower should therefore have plenty of bees in the orchard during 
the blossoming period. 
[Honeybees are rented for the pollination of almonds, apples, avo- 
cados, cranberries, pears, plums, prunes and cherries, as well as cucumbers 
and alsike clover. 1 
Almond 
Tufts, W. P., and Philp, Guy L. 
1922. Almond pollination. Calif. Agr. Expt. Sta. Bui. 34-6, 35 pp. 
p. 24.: Pollenizing agencies, such as the honey bee, are neces- 
sary to the set of a good crop of fruit. One colony of honey bees 
should be provided for each acre of orchard. 
Crane, H. L., and Reed, C. A. 
1937. Nut breeding. U. S. Dept. Agr. Yearbook 1937: 827-889. 
p. 872 j The pollen of almond and tung trees is carried by 
insects. 
Apple 
Auchter, E. C. 
1924. The importance of proper pollination in fruit yields. N. J. State 
Hort. Soc. Proc. 1924: 133-K2. 
pp. I4.O-I4.I1 The value of bees in pollination. The carrying of 
pollen from one variety to another is accomplished by wind and bees. 
It has been found, however, that pollen is carried only very short 
distances by wind, but that bees play a very important part in carrying 
the pollen. 
In crossing into the blossoms to ?et the nectar, their bodies 
become dusted with the pollen. This pollen is then left on the stigmas 
of other blossoms when they are visited. In California the invest!- 
