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IJSTR >> Volume 5 - Issue 4, April 2016 Edition

International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616

Effects Of Artificial Defoliations On The Growth And Yield Of Okra (Abelmoschus Esculentus (L.)(Moench.) CV ‘Smooth Cayene’ Under Mid-Elevation Condition

[Full Text]



Eric Randy R. Politud



Defoliation, defoliation of lower half of the stem (DLHS), erectophile, leaf area index (LAI), mutual shading, pods, Smooth Cayene, return on investment (ROI), week after sowing (WAS)



Defoliation of the lower leaves of the stem provides the upper leaves to maximize their photosynthetic activity, thus optimizing their growth and yield potentials. This study was conducted to determine the effect of artificial defoliations on the growth and yield of okra under the mid-elevation condition of Bukidnon, Northern Mindanao, Philippines. A Randomized Complete Block Design (RCBD) with four treatments and three replications was used, namely: T1 (no defoliation), T2 (defoliation of lower half of the stem- DLHS at 5 weeks after sowing-WAS), T3 (DHLS at 6 WAS), and T4 (DLHS at 7 WAS). Results revealed that artificial defoliations significantly influenced the production of pods, weight of pods per plant and the total pod yield per hectare, but not with the plant height, pest resistance, days to flowering, and length and diameter of pods. Removal of the lower leaves of the stem paved the way for upper leaves to intensify photosynthetic activity and minimized mutual shading and competition for foods. Treatment 4 consistently obtained the most number of pods (82), heaviest pods per plant (394.81 g) and highest total yield (9.87 t/ha). Consistently, T4 (defoliation at 7 WAS) registered the highest ROI with 425%, while T1 obtained the lowest with 316.11%. Thus, defoliations at 7 WAS of the lower leaves gave better growth and yield performance of Smooth Cayene variety than those undefoliated under the mid-elevation condition of Bukidnon.



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