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ed pollination problems have observed that Delicious and staymen ^do not "set” fruit in abundance when pollen from the same tree fertilizes the flowers. They have also noted that if the pollen of two varieties occurs on the pistel of the flower it is usually Always the foreign pollen that causes fertilization. This is cross pollination and was observed by Darwin and others. Cross pollination gives plants what is known today as "hybrid vigor.”
Varieties which do not pollinate with Bed Delicious and Staymen very well are Transparent, McIntosh, Courtland, Duchess, and Winesap. Varieties which are compatible to Staymen, Delicious, Crimes, and Winesap are Rome, Crimes, Jonathan, Golden Delicious, and York.
The orchardist should be concerned with the fact that pollen from apple blossoms is quite moist and sticky and is not readily blown about by the. wind. This is demonstrated by the fact that where there are no insect visitors to the flowers, little fruit results. Neotar'is apparently put in flowers by the Creator to attract in- . sects which wilj carry pollen from plant to plant and perpetuate the ^Speeiet(, ■
The orchardist should also be concerned about the insects pres
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