ABSTRACT
The prime assimilatory process is photosynthesis. Assimilation products must be transported to a plant part (sink) if it is to grow. It is important to maximize the proportion of total assimilate pool that is partitioned into plant parts that are harvested for their economic value. Therefore, any procedure one might use to enhance partitioning of assimilate into these sinks will serve to increase economic gain. This involves production of assimilates, loading of assimilates into phloem, their transport through phloem (translocation), and their unloading from phloem into appropriate sinks and incorporation into sink materials. Also, if pesticides are to be used in the most effective and benign manner, their transport must be understood.
