Abstract
Abstract The potential for mepiquat chloride (1,1‐dimethylpiperidinium chloride) to control excess vegetative growth and increase yield of cotton ( Gossypium hirsutum L.) was evaluated under a wide range of environmental conditions in 35 replicated experiments conducted in the San Joaquin Valley of California from 1979 to 1983. Predominant soils were thermic Xeric Torriorthent's and typic Torriorthents. Yield response to mepiquat chloride (MC) has varied in production fields as well as in these tests. The focus of this study was to identify those variables which have contributed to the variability observed. Plot size among experiments varied from 15 m 2 to 1.3 ha. Mepiquat chloride was applied at 49 g ha −1 when bloom counts reached 0.7 white blooms m −1 row and plant height was between 46 to 61 cm. Overall, MC treated plots yielded 1309 compared to 1299 kg ha −1 lint for control plots and the yield response varied significantly among experiments. Forty‐six percent of this variability could be accounted for by number of heat units for the growing season and by the final plant height of control plants. Yield increases occurred when the growing season was short or when final height of control plants was either shorter or taller than normal. Yield decreases occurred when heat units ranged between 2600 to 3000 and final control plant height ranged from 90 to 110 cm. Height reduction due to MC treatment varied according to plant height (r=0.57 for n= 17) and was maximal at 105 cm. Mepiquat chloride reduced main stem nodes by 1.0, gin turnout by 0.4%, and lint proportion by 0.3%; increased percent of final yield harvestable on 19 September by 5%, fiber strength by 3 kN m kg −1 , micronaire by 0.06 units, and petiole NO 3 ‐N at first open boll by 0.5 g kg −1 ; and had no effect on fiber length, fiber elongation, petiole PO 4 ‐P and K, or NO 3 ‐N at first bloom. Typical seasonal heat units and control plant heights in the San Joaquin Valley fall within the range where a favorable yield response to MC is not predicted.
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Claims 17
Claim · model-written summary
Overall, mepiquat chloride-treated cotton plots yielded slightly more lint than control plots.
- Taxon
- cotton
Gossypium hirsutume0 - Treatment
- mepiquat chloridee0
- Outcome
- yielde0
- Direction
- higherinferrede1
- Comparator
- control plotse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mepiquat chloride (1,1‐dimethylpiperidinium chloride) to control excess vegetative growth and increase yield of cotton ( Gossypium hirsutum L.)”
e1“Overall, MC treated plots yielded 1309 compared to 1299 kg ha −1 lint for control plots”
Claim · model-written summary
The yield response of cotton to mepiquat chloride varied significantly among experiments.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- mepiquat chloridee0
- Outcome
- yield responsee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mepiquat chloride (1,1‐dimethylpiperidinium chloride) to control excess vegetative growth and increase yield of cotton ( Gossypium hirsutum L.)”
e2“the yield response varied significantly among experiments”
Claim · model-written summary
Forty-six percent of the variability in cotton yield response to mepiquat chloride is accounted for by growing-season heat units and final control plant height.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- number of heat units for the growing seasone3
- Outcome
- variabilitye3
- Value
- Forty‐six percente3
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mepiquat chloride (1,1‐dimethylpiperidinium chloride) to control excess vegetative growth and increase yield of cotton ( Gossypium hirsutum L.)”
e3“Forty‐six percent of this variability could be accounted for by number of heat units for the growing season and by the final plant height of control plants”
Claim · model-written summary
Cotton yield increased when the growing season was short.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- the growing season was shorte4
- Outcome
- Yielde4
- Direction
- increasese4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mepiquat chloride (1,1‐dimethylpiperidinium chloride) to control excess vegetative growth and increase yield of cotton ( Gossypium hirsutum L.)”
e4“Yield increases occurred when the growing season was short or when final height of control plants was either shorter or taller than normal”
Claim · model-written summary
Cotton yield increased when final control plant height was either shorter or taller than normal.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- final height of control plants was either shorter or taller than normale4
- Outcome
- Yielde4
- Direction
- increasese4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mepiquat chloride (1,1‐dimethylpiperidinium chloride) to control excess vegetative growth and increase yield of cotton ( Gossypium hirsutum L.)”
e4“Yield increases occurred when the growing season was short or when final height of control plants was either shorter or taller than normal”
Claim · model-written summary
Cotton yield decreased when heat units ranged between 2600 and 3000 and final control plant height ranged from 90 to 110 cm.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- heat units ranged between 2600 to 3000 and final control plant height ranged from 90 to 110 cme6
- Outcome
- Yielde6
- Direction
- decreasese6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mepiquat chloride (1,1‐dimethylpiperidinium chloride) to control excess vegetative growth and increase yield of cotton ( Gossypium hirsutum L.)”
e6“Yield decreases occurred when heat units ranged between 2600 to 3000 and final control plant height ranged from 90 to 110 cm”
Claim · model-written summary
Mepiquat chloride reduced main stem nodes of cotton by 1.0.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- Mepiquat chloridee7
- Outcome
- main stem nodese7
- Direction
- reducede7
- Value
- 1.0e7
- Comparator
- control plotse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mepiquat chloride (1,1‐dimethylpiperidinium chloride) to control excess vegetative growth and increase yield of cotton ( Gossypium hirsutum L.)”
e1“Overall, MC treated plots yielded 1309 compared to 1299 kg ha −1 lint for control plots”
e7“Mepiquat chloride reduced main stem nodes by 1.0, gin turnout by 0.4%, and lint proportion by 0.3%”
Claim · model-written summary
Mepiquat chloride reduced gin turnout of cotton by 0.4%.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- Mepiquat chloridee7
- Outcome
- gin turnoute7
- Direction
- reducede7
- Value
- 0.4%e7
- Comparator
- control plotse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mepiquat chloride (1,1‐dimethylpiperidinium chloride) to control excess vegetative growth and increase yield of cotton ( Gossypium hirsutum L.)”
e1“Overall, MC treated plots yielded 1309 compared to 1299 kg ha −1 lint for control plots”
e7“Mepiquat chloride reduced main stem nodes by 1.0, gin turnout by 0.4%, and lint proportion by 0.3%”
Claim · model-written summary
Mepiquat chloride reduced lint proportion of cotton by 0.3%.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- Mepiquat chloridee7
- Outcome
- lint proportione7
- Direction
- reducede7
- Value
- 0.3%e7
- Comparator
- control plotse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mepiquat chloride (1,1‐dimethylpiperidinium chloride) to control excess vegetative growth and increase yield of cotton ( Gossypium hirsutum L.)”
e1“Overall, MC treated plots yielded 1309 compared to 1299 kg ha −1 lint for control plots”
e7“Mepiquat chloride reduced main stem nodes by 1.0, gin turnout by 0.4%, and lint proportion by 0.3%”
Claim · model-written summary
Mepiquat chloride increased the percent of final cotton yield harvestable on 19 September by 5%.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- Mepiquat chloridee7
- Outcome
- percent of final yield harvestable on 19 Septembere5
- Direction
- increasede5
- Value
- 5%e5
- Comparator
- control plotse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mepiquat chloride (1,1‐dimethylpiperidinium chloride) to control excess vegetative growth and increase yield of cotton ( Gossypium hirsutum L.)”
e1“Overall, MC treated plots yielded 1309 compared to 1299 kg ha −1 lint for control plots”
e7“Mepiquat chloride reduced main stem nodes by 1.0, gin turnout by 0.4%, and lint proportion by 0.3%”
e5“increased percent of final yield harvestable on 19 September by 5%, fiber strength by 3 kN m kg −1 , micronaire by 0.06 units, and petiole NO 3 ‐N at first open boll by 0.5 g kg −1”
Claim · model-written summary
Mepiquat chloride increased cotton fiber strength by 3 kN m kg −1.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- Mepiquat chloridee7
- Outcome
- fiber strengthe5
- Direction
- increasede5
- Value
- 3 kN m kg −1e5
- Comparator
- control plotse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mepiquat chloride (1,1‐dimethylpiperidinium chloride) to control excess vegetative growth and increase yield of cotton ( Gossypium hirsutum L.)”
e1“Overall, MC treated plots yielded 1309 compared to 1299 kg ha −1 lint for control plots”
e7“Mepiquat chloride reduced main stem nodes by 1.0, gin turnout by 0.4%, and lint proportion by 0.3%”
e5“increased percent of final yield harvestable on 19 September by 5%, fiber strength by 3 kN m kg −1 , micronaire by 0.06 units, and petiole NO 3 ‐N at first open boll by 0.5 g kg −1”
Claim · model-written summary
Mepiquat chloride increased cotton micronaire by 0.06 units.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- Mepiquat chloridee7
- Outcome
- micronairee5
- Direction
- increasede5
- Value
- 0.06 unitse5
- Comparator
- control plotse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mepiquat chloride (1,1‐dimethylpiperidinium chloride) to control excess vegetative growth and increase yield of cotton ( Gossypium hirsutum L.)”
e1“Overall, MC treated plots yielded 1309 compared to 1299 kg ha −1 lint for control plots”
e7“Mepiquat chloride reduced main stem nodes by 1.0, gin turnout by 0.4%, and lint proportion by 0.3%”
e5“increased percent of final yield harvestable on 19 September by 5%, fiber strength by 3 kN m kg −1 , micronaire by 0.06 units, and petiole NO 3 ‐N at first open boll by 0.5 g kg −1”
Claim · model-written summary
Mepiquat chloride increased petiole NO3-N at first open boll of cotton by 0.5 g kg-1.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- Mepiquat chloridee7
- Outcome
- petiole NO 3 ‐N at first open bolle5
- Direction
- increasede5
- Value
- 0.5 g kg −1e5
- Comparator
- control plotse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mepiquat chloride (1,1‐dimethylpiperidinium chloride) to control excess vegetative growth and increase yield of cotton ( Gossypium hirsutum L.)”
e1“Overall, MC treated plots yielded 1309 compared to 1299 kg ha −1 lint for control plots”
e7“Mepiquat chloride reduced main stem nodes by 1.0, gin turnout by 0.4%, and lint proportion by 0.3%”
e5“increased percent of final yield harvestable on 19 September by 5%, fiber strength by 3 kN m kg −1 , micronaire by 0.06 units, and petiole NO 3 ‐N at first open boll by 0.5 g kg −1”
Claim · model-written summary
Mepiquat chloride had no effect on cotton fiber length or fiber elongation.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- Mepiquat chloridee7
- Outcome
- fiber length, fiber elongatione6
- Direction
- no effecte6
- Comparator
- control plotse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mepiquat chloride (1,1‐dimethylpiperidinium chloride) to control excess vegetative growth and increase yield of cotton ( Gossypium hirsutum L.)”
e1“Overall, MC treated plots yielded 1309 compared to 1299 kg ha −1 lint for control plots”
e7“Mepiquat chloride reduced main stem nodes by 1.0, gin turnout by 0.4%, and lint proportion by 0.3%”
e6“had no effect on fiber length, fiber elongation, petiole PO 4 ‐P and K, or NO 3 ‐N at first bloom”
Claim · model-written summary
Mepiquat chloride had no effect on cotton petiole PO4-P, K, or NO3-N at first bloom.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- Mepiquat chloridee7
- Outcome
- petiole PO 4 ‐P and K, or NO 3 ‐N at first bloome6
- Direction
- no effecte6
- Comparator
- control plotse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mepiquat chloride (1,1‐dimethylpiperidinium chloride) to control excess vegetative growth and increase yield of cotton ( Gossypium hirsutum L.)”
e1“Overall, MC treated plots yielded 1309 compared to 1299 kg ha −1 lint for control plots”
e7“Mepiquat chloride reduced main stem nodes by 1.0, gin turnout by 0.4%, and lint proportion by 0.3%”
e6“had no effect on fiber length, fiber elongation, petiole PO 4 ‐P and K, or NO 3 ‐N at first bloom”
Claim · model-written summary
A favorable cotton yield response to mepiquat chloride is not predicted under typical San Joaquin Valley heat units and control plant heights.
- Taxon
- cottonGossypium hirsutume0
- Outcome
- favorable yield responsee5
- Direction
- not predictede5
- Setting
- San Joaquin Valleye5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mepiquat chloride (1,1‐dimethylpiperidinium chloride) to control excess vegetative growth and increase yield of cotton ( Gossypium hirsutum L.)”
e5“Typical seasonal heat units and control plant heights in the San Joaquin Valley fall within the range where a favorable yield response to MC is not predicted”
Claim · model-written summary
Cotton height reduction due to mepiquat chloride varied with plant height and was maximal at 105 cm.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- plant heighte6
- Outcome
- Height reductione6
- Direction
- maximale6
- Value
- 105 cme6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mepiquat chloride (1,1‐dimethylpiperidinium chloride) to control excess vegetative growth and increase yield of cotton ( Gossypium hirsutum L.)”
e6“Height reduction due to MC treatment varied according to plant height (r=0.57 for n= 17) and was maximal at 105 cm”
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See all 26 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.