This project is developing the knowledge and tools needed to manipulate and maximise avocado tree yields. Specifically, the project is looking at resource competition between shoots and fruits, potentially providing for new methods of reducing fruit drop. Because vegetative shoot growth coincides with fruit development in avocado trees, competition exists for carbohydrates, other nutrients and hormones necessary for maintaining growth. This competition can impact on the early stages of fruit development, resulting in fruit growth cessation followed by abscission – a key event that limits avocado production. This work is also looking at how high, sustainable production can be achieved from year to year, through progressing the understanding of high-yielding tree development.