Effect of the distance between female and male jojoba plants on fruit set

Fruit set of the dioecious, wind-pollinated plant jojoba (Simmondsia chinensis) was studied in two clones of female plants as a function of their distance between female and male plants growing in separate rows. At a distance of > 27 m between the two sexes, a significant decrease of fruit set was observed. This effect was stronger in the early-flowering clone (Q-106) than in the late-flowering one (64). Fruit set tended to increase in the rows south of the male row than in those located in the opposite direction.