The effects of nighttime temperature, shading and branch training on the bearing and yield of parthenocarpic eggplant in forcing culture
2006
Koga, T.(Fukuoka-ken. Agricultural Research Center, Chikushino (Japan)) | Ishizaka, A. | Shimomura, K. | Sueyoshi, T.
Parthenocarpic eggplant requires fewer working hours. Common Japanese eggplant varieties are non-parthenocarpic and need 4-CPA treatment to bear fruit in forcing culture. Engaging in this treatment is quite time consuming. We examined the effects of nighttime temperature and shading treatment on parthenocarpic eggplant in forcing culture in terms of bearing fruit and its thickness. Additionally, the effects of primary scaffold branch training on the yield were examined. 1. All fruit of parthenocarpic eggplant 'AE-P03' grew normally under the low nighttime temperatures. The shading treatment had no effect on the thickening of the fruit of 'AE-P03', although the number of blooms and rate of bearing decreased. 2. The yield of parthenocarpic eggplant 'Anoukou 6' was less than that of the common cultivar 'Chikuyou'. But a two-primary scaffold branch in vertical training brought about better yield than a three or four-scaffold branch for 'Anoukou6'. 3. The foregoing results indicate that it is important to develop and propagate parthenocarpic eggplant cultivation for excellent yields and qualities.
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