- 3 - 
In the following pages literature is cited in support of the premise 
(1) that wild pollinating insects are deficient in number adequately to 
pollinate our agricultural crops, and (2) that at least 50 agricultural 
crops depend upon honeybees for pollination or yield more abundantly when 
bees are plentiful. 1/ The specific fruit and seed crops mentioned in 
these references are tabulated below: 
Fruit 
Crops 
Seed Crops 
Almond 
Alfalfa 
Kohlrabi 
Apple 
Asparagus 
Muskmelon 
Apricot 
Broccoli 
Onion 
Avocado 
Brussels sprouts 
Parsnip 
Blackberry 
Buckwheat 
Peooer 
Blueberry and huckleberry 
Cabbage 
Pumpkin 
Cherry 
Carrot 
Radish 
Cranberry 
Cauliflower 
Rape 
Cucumber 
Celery 
Rutabaga 
Dewberry 
Clovers (alsike, 
crimson, 
Squash 
Gooseberry 
red, strawberry, white, 
Sunflower 
Grape 
and Ladino white) 
Sweet clover 
Mango 
Collar ds 
Trefoil 
Muskmelon 
Cotton 
Turnip 
Peach and nectarine 
Cucumber 
Vetches 
Pear 
Flax 
Watermelon 
Persimmon , 
native 
Kale 
Plum and prune 
Raspberry 
Strawberry 
Tung 
Watermelon 
POLLINATION REQUIREMENTS OF PLANTS 2/ 
Fletcher, S. W. 
1941. Pollination. Standard cyclopedia of horticulture, by 
L. H. Bailey, v. 3, pp. 2734-2737. New York 
p. 2734 J ...it is well known that while the flowers of many 
plants may be readily fertilized by their own pollen, the offspring 
are stronger when pollen from another plant or another variety has 
had access to the flower. Sometimes pollen from a foreign variety 
1/ These quotations are for the most part from plant specialists, 
with only a few from authorities on apiculture. 
2/ The underlining in the references does not appear in the original 
citations but has been added for emphasis. 
