- It is a great honor to dedicate this special issue to Prof. Emeritus Yossi Mizrahi, in recognition of his intensive work for more than two decades on under-utilized fruit trees, especially cactus species. During his illustrious career, Yossi has published 116 manuscripts in scientific journals and 21 chapters in books, and supervised 47 graduate students from Israel and abroad. Each of these students—and I was privileged to be one of them—was encouraged by Yossi's endless enthusiasm, immense patience, and keen intellect. We wish Yossi many productive years to continue his important mission of spreading his message of love for exotic fruit crops.