Additional illumination, artificial pollination and use of pollen from additionally illuminated plants in early-tomato growing

Introduction 2. Description of experiments 3. Experiment I 4. Experiment II 5. Discussion 6. Conclusions References Summary In the determinate tomato variety Dwarf Gem the effects of additional illumination, artificial pol lination, two extra leaves on some lateral shoots and the use of good pollen from flowers of illuminated plants were studied early in spring in the greenhouse.The additional illumination and the artificial pollination alone, and particularly in combination, accelerated the yield considerably.The effect of the extra leaves was variable.Viable pollen from illuminated plants gave good results on flowers of not illuminated plants: The numbers of seed per fruit and hence the fruit size and earliness were better than with artificial pollination.