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Sex ratio, growth and yield of Squash (Cucubita pepo L.) cultivars under stresses of different light regimes

By: Magdi Ali Ahmed Mousa, Adel Daif Allah Al-Qurashi

Key Words: Light regimes, Squash, Sex ratio, Light stresses, Yield

Int. J. Biosci. 10(2), 49-60, February 2017.



This study was conducted in 2013/2014 at the greenhouse of Agriculture Research Station at King Abdulaziz University, Saudi Arabia. The aim of the presented work was to test sex ratio of four squash cultivars “Caserta”, “Rivera,” “Claudina” and “Cue-Ball” under stresses of different light regimes. Three different lighting systems 5000 – 10000lux (80%shade), 1000-15000lux (60%shade) and full light (15000-20000lux) were designed using fluorescent lamp and net with different shade levels. Squash cultivars were planted in open field for comparison. The experiments were laid out in split plot design and the treatments were distributed using randomized complete block using four replicates (RCBD). The Results revealed superiority of all tested cultivars when grown in open field at all measured parameters except plant height (cm) and number of leaves/plant with a marked superiority of the variety “Claudina”. Plant height and no. of leaves were significantly increased under light regimes 80% and 60% shade. Sex ratio was highly affected by light regimes and balanced ration of male: female flowers was observed for squash plants grown in open field. Reducing light intensity by using 60% shade increased male flowers of all cultivars, while 80% shade inhibited formation of female flowers. The squash cultivar “Claudina” scored the highest yield components and yield parameters under open field conditions and full light regime (15000-20000lux). All cultivars formed no fruits under light regime 80% shade (5000-10000lux).

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Sex ratio, growth and yield of Squash (Cucubita pepo L.) cultivars under stresses of different light regimes

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Magdi Ali Ahmed Mousa, Adel Daif Allah Al-Qurashi. 2017. Sex ratio, growth and yield of Squash (Cucubita pepo L.) cultivars under stresses of different light regimes. Int. J. Biosci. 10(2), 49-60.
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