Abstract
A field experiment was laid out to study the effect of defoliant (ethrel) through foliar application on yield and fibre quality traits of a late maturing Bt cotton hybrid (RCH 134 Bt) during 2007 and 2008. No significant differences for seed cotton yield during 2007 were recorded when the ethrel was applied (500, 650 and 800 ppm) at 130 and 145 DAS. However, the treatments recorded, numerically, higher seed cotton yield than that of the control. Maximum increase of 12.5% in seed cotton yield was observed when ethrel was applied @ 800 ppm at 145 DAS. Maximum number of bolls per plant (68) with maximum boll opening percentage (80) was recorded in the same treatment. To further improve the boll opening percentage for better yield performance same experiment was conducted using higher doses of ethrel (1500, 2000 and 2500ppm) at 145 and 160 DAS during 2008. Of the various treatments, ethrel @ 2000 ppm at 145 and 160 DAS was found most effective in improving the boll opening percentage to get higher yield potential from the late maturing Bt hybrid without having any adverse affect on fibre quality traits.
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Claims 7
Claim · model-written summary
Ethrel treatments at 130 and 145 DAS had no significant differences in 2007 seed cotton yield.
- Taxon
- Upland Cottont0
- Treatment
- ethrel was applied (500, 650 and 800 ppm) at 130 and 145 DASe0
- Outcome
- seed cotton yielde0
Not reportedComparatorSettingDirection
Verbatim
e0“No significant differences for seed cotton yield during 2007 were recorded when the ethrel was applied (500, 650 and 800 ppm) at 130 and 145 DAS.”
t0“Upland Cotton”
Claim · model-written summary
Ethrel treatments produced numerically higher seed cotton yield than control.
Verbatim
e0“the treatments recorded, numerically, higher seed cotton yield than that of the control.”
t0“Upland Cotton”
Claim · model-written summary
Ethrel at 800 ppm at 145 DAS increased seed cotton yield by a maximum of 12.5%.
- Taxon
- Upland Cottont0
- Treatment
- ethrel was applied @ 800 ppm at 145 DASe0
- Outcome
- seed cotton yielde0
- Direction
- increasee0
- Value
- 12.5%e0
Not reportedComparator
Verbatim
e0“Maximum increase of 12.5% in seed cotton yield was observed when ethrel was applied @ 800 ppm at 145 DAS.”
t0“Upland Cotton”
Claim · model-written summary
The 800 ppm treatment at 145 DAS produced the maximum 68 bolls per plant.
- Taxon
- Upland Cottont0
- Treatment
- ethrel was applied @ 800 ppm at 145 DASe1
- Outcome
- number of bolls per plante0
- Direction
- Maximume0
- Value
- 68e0
Not reportedComparator
Verbatim
e0“Maximum number of bolls per plant (68) with maximum boll opening percentage (80) was recorded in the same treatment.”
e1“ethrel was applied @ 800 ppm at 145 DAS”
t0“Upland Cotton”
Claim · model-written summary
The 800 ppm treatment at 145 DAS produced maximum boll opening of 80%.
- Taxon
- Upland Cottont0
- Treatment
- ethrel was applied @ 800 ppm at 145 DASe1
- Outcome
- boll opening percentagee0
- Direction
- maximume0
- Value
- 80e0
Not reportedComparator
Verbatim
e0“Maximum number of bolls per plant (68) with maximum boll opening percentage (80) was recorded in the same treatment.”
e1“ethrel was applied @ 800 ppm at 145 DAS”
t0“Upland Cotton”
Claim · model-written summary
Ethrel at 2000 ppm at 145 and 160 DAS was most effective for boll opening.
Verbatim
e0“Of the various treatments, ethrel @ 2000 ppm at 145 and 160 DAS was found most effective in improving the boll opening percentage”
t0“Upland Cotton”
Claim · model-written summary
The most effective ethrel treatment had no adverse effect on fibre quality traits.
- Taxon
- Upland Cottont0
- Treatment
- ethrel @ 2000 ppm at 145 and 160 DASe0
- Outcome
- fibre quality traitse0
- Direction
- without having any adverse affecte0
Not reportedComparator
Verbatim
e0“ethrel @ 2000 ppm at 145 and 160 DAS was found most effective in improving the boll opening percentage to get higher yield potential from the late maturing Bt hybrid without having any adverse affect on fibre quality traits.”
t0“Upland Cotton”
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