Vol. 70 No: 1

Title:
Low-Temperature Pulse Affects Growth and Development of Young Cucumber and Tomato Plants

Author:
S.O. GRIMSTAD

pp: 75-80

Abstract:
To reduce stem elongation in young cucumber and tomato plants, the effect of a low-temperature pulse (LTP) in connection with day break was investigated. For cucumber an LTP at the end of the night was superior to an LTP application at the start of the daily light span or at the time of change-over, and reduced the final plant height by 24% compared with the control plants. An LTP at the beginning of the daily light period reduced tomato plant height by 28%. In both species additional effects of an LTP application, such as reduced plant growth (dry weight) and development (number of leaves, leaf-petiole length), were also observed. In tomato flowering was delayed. Consequently, time to first harvest was delayed. However, LTP affected neither early yield nor quality of tomatoes or cucumbers.

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