Abstract
In cotton, mechanized harvesting has gained popularity in recent years due to labor-intensive process and shortage of labor. Moreover, mechanized harvesting of cotton depends on plant morphological characters like plant height, internodal length and synchronized boll maturity and opening etc. Mechanized harvesting enhancing the harvesting efficiency of cotton which is achieved by the use of some chemicals to attain good lint yield and fibre quality. With this background, the field experiment was conducted to study the impact of growth retardant and defoliant on morpho-physiological traits and yield improvement in cotton (CO 17) during 2021-2022 by following randomized block design with four treatments and five replications. The current study revealed that spraying of 0.015% mepiquat chloride (MC) at square formation and boll development stage significantly reduced the leaf area, plant height, total dry weight and boll number when compared to control. However, chlorophyll content and normalized difference vegetation index (NDVI) were recorded higher in 0.015% mepiquat chloride (MC) applied treatments than control. Moreover, spraying of mepiquat chloride (0.015%) at square formation and boll development stage followed by spraying of 0.9% sodium chlorate (SC) at 60% boll bursting stage significantly increased the seed cotton yield compared to other treatments and recorded maximum seed cotton yield of 25.22% compared to control. Results clearly indicate that application of MC followed by SC could be a better practice for canopy management in cotton, resulting in improved efficiency of mechanical harvesting and good lint yield and fibre quality.
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Claims 5
Claim · model-written summary
Mepiquat chloride reduced leaf area, plant height and total dry weight relative to control.
- Organ / stage
- square formation and boll development stagee0
- Treatment
- spraying of 0.015% mepiquat chloride (MC)e0
- Outcome
- leaf area, plant height, total dry weighte0
- Direction
- reducede0
- Comparator
- controle0
Not reportedTaxon
Verbatim
e0“spraying of 0.015% mepiquat chloride (MC) at square formation and boll development stage significantly reduced the leaf area, plant height, total dry weight and boll number when compared to control.”
t0“cotton”
Claim · model-written summary
Mepiquat chloride reduced boll number relative to control.
- Taxon
- cotton
Gossypium hirsutumt0 - Treatment
- spraying of 0.015% mepiquat chloride (MC)e0
- Outcome
- boll numbere0
- Direction
- reducede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“spraying of 0.015% mepiquat chloride (MC) at square formation and boll development stage significantly reduced the leaf area, plant height, total dry weight and boll number when compared to control.”
t0“cotton”
Claim · model-written summary
Mepiquat chloride increased chlorophyll content and NDVI relative to control.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- 0.015% mepiquat chloride (MC)e0
- Outcome
- chlorophyll content and normalized difference vegetation index (NDVI)e0
- Direction
- highere0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“chlorophyll content and normalized difference vegetation index (NDVI) were recorded higher in 0.015% mepiquat chloride (MC) applied treatments than control.”
t0“cotton”
Claim · model-written summary
Mepiquat chloride followed by sodium chlorate significantly increased seed cotton yield, reaching 25.22% relative to control.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- spraying of mepiquat chloride (0.015%) at square formation and boll development stage followed by spraying of 0.9% sodium chlorate (SC) at 60% boll bursting stagee0
- Outcome
- seed cotton yielde0
- Direction
- increasede0
- Value
- 25.22%e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“spraying of mepiquat chloride (0.015%) at square formation and boll development stage followed by spraying of 0.9% sodium chlorate (SC) at 60% boll bursting stage significantly increased the seed cotton yield compared to other treatments and recorded maximum seed cotton yield of 25.22% compared to control.”
t0“cotton”
Claim · model-written summary
The authors recommend MC followed by SC for cotton canopy management and mechanical harvesting.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- application of MC followed by SCe0
- Outcome
- better practice for canopy managemente0
- Qualifier
- improved efficiency of mechanical harvesting and good lint yield and fibre qualitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“application of MC followed by SC could be a better practice for canopy management in cotton, resulting in improved efficiency of mechanical harvesting and good lint yield and fibre quality.”
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