Effect of transplanting dates on key pests, natural enemy profile, and yield of hybrid and inbred rice
The study aimed to determine the effect of transplanting dates on key pests, natural enemy profile, and yield of hybrid and inbred rice. It was conducted at PhilRice Isabela from 2008 wet season (WS) to 2009 dry season (DS). Twenty transplanting dates with a two-week interval were done. Results show...
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Published in | Philippine Journal of Crop Science (Philippines) Vol. 35; no. 1 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
01.03.2010
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Subjects | |
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Abstract | The study aimed to determine the effect of transplanting dates on key pests, natural enemy profile, and yield of hybrid and inbred rice. It was conducted at PhilRice Isabela from 2008 wet season (WS) to 2009 dry season (DS). Twenty transplanting dates with a two-week interval were done. Results showed Planting 3 (June 21) and Planting 4 (July 6) obtained the highest yield of 6.6 and 6.0 t/ha, respectively during WS. Meanwhile, during DS, Planting 15 (Dec. 17) and Plant 16 (Jan 2) obtained the highest yield of 6.4 and 5.3 t/ha, respectively. Higher yields were obtained from these transplanting dates owing to minimal abiotic and biotic stresses. Whitehead damaged peaked at Planting 17 (Jan 17), rice tungro virus (RTV) had the highest percent damage at Planting 6 (Aug. 5), while insect population was highest at Planting 4 (July 6). RTV incidence and insect population were positively correlated with minimum and maximum temperature. For improved rice yield, the study recommends that farmers do transplanting from second week of December to first week of January on DS, and from the third week of June to first week of July on WS. |
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AbstractList | The study aimed to determine the effect of transplanting dates on key pests, natural enemy profile, and yield of hybrid and inbred rice. It was conducted at PhilRice Isabela from 2008 wet season (WS) to 2009 dry season (DS). Twenty transplanting dates with a two-week interval were done. Results showed Planting 3 (June 21) and Planting 4 (July 6) obtained the highest yield of 6.6 and 6.0 t/ha, respectively during WS. Meanwhile, during DS, Planting 15 (Dec. 17) and Plant 16 (Jan 2) obtained the highest yield of 6.4 and 5.3 t/ha, respectively. Higher yields were obtained from these transplanting dates owing to minimal abiotic and biotic stresses. Whitehead damaged peaked at Planting 17 (Jan 17), rice tungro virus (RTV) had the highest percent damage at Planting 6 (Aug. 5), while insect population was highest at Planting 4 (July 6). RTV incidence and insect population were positively correlated with minimum and maximum temperature. For improved rice yield, the study recommends that farmers do transplanting from second week of December to first week of January on DS, and from the third week of June to first week of July on WS. |
Author | Pablo, M.A Gaspar, M.G., Philippine Rice Research Inst., Malasin, San Mateo, 3318 Isabela (Philippines) Pasicolan, H.R Baldovino, R.M |
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Title | Effect of transplanting dates on key pests, natural enemy profile, and yield of hybrid and inbred rice |
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