A simple field test to determine if you have enough bees:
Count number of open, untripped flowers per raceme at the end of the day.
Slide 6 of 21
How to tell if you have enough bees
Ultimately modeling may lead to a program that growers can use to predict
how many bees they will need to pollinate their particular field. But our
field monitoring efforts suggest a simple test that a grower can use to
assess whether the bees that he has introduced are, providing rapid
pollination. This test can be done without any specific knowledge or
predictions of how much bloom he will have in the field, and how many bees
are required to pollinate this bloom. The test takes advantage of a
phenomenon associated with seasonal changes in flower standing crop: a
change in the distribution of number of open flowers per raceme.