Abstract
Field studies were conducted to determine the critical period of weed control in chickpea (Cicer arietinum L.) cv. ‘Jam’. The treatments consisted of two different periods of weed interference and weed control. Weed interference and weed-free treatments were set up after the crop emergence. Beginning of CPWC was determined by allowing weeds to compete or were kept weed-free at 2 weekly intervals for 2 (weed-free control) to 12 weeks after emergence (WAE). The Gompertz and logistic equations were fitted to relative yield and total dry matter representing the critical weed-free and the critical time of weed removal, respectively. Results indicated that Crop yield, total dry matter, 100 seed weight, number of pod in plant and number of seed in plant declined steadily as the duration of weed competition increased, indicating weed infested conditions for the entire growing season led to 76.4-85.8% and 78.5-85.7% reduction in chickpea dry matter and seed yield compared with full-season weed-free treatments. Also, the major weeds in experiment were Stachys byzantine, Tragopogon dubius, Gypsophila pilosa and Euphorbia helioscpia. To prevent >10% yield and total dry matter loss, the maximum time weeds could be allowed to grow after crop emergence were 43 and 36 DAE respectively and Also, critical period for weed control at 5 % yield and total dry matter loss was 36-60 DAE and 26-71 DAE. But critical period at 2.5 % yield and total dry matter loss was widespreader than other loss level. These results suggested that weed control upgraded all of agronomical traits of chickpea especially seed yield and to minimizing loss level of yield removal weeds must be done at 19-80 DAE.
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Claims 10
Claim · model-written summary
Longer weed competition steadily reduced chickpea yield, dry matter, seed weight, pods and seeds per plant.
- Taxon
- Chickpea
Cicer arietinumt0 - Treatment
- duration of weed competitione0
- Outcome
- Crop yield, total dry matter, 100 seed weight, number of pod in plant and number of seed in plante0
- Direction
- declinede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Crop yield, total dry matter, 100 seed weight, number of pod in plant and number of seed in plant declined steadily as the duration of weed competition increased”
t0“Chickpea”
Claim · model-written summary
Weed infestation throughout the season reduced chickpea dry matter by 76.4-85.8% versus weed-free treatment.
- Taxon
- chickpeaCicer arietinume0
- Treatment
- weed infested conditions for the entire growing seasone0
- Outcome
- chickpea dry mattere0
- Direction
- reductione0
- Value
- 76.4-85.8%e0
- Comparator
- full-season weed-free treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“weed infested conditions for the entire growing season led to 76.4-85.8% and 78.5-85.7% reduction in chickpea dry matter and seed yield compared with full-season weed-free treatments”
Claim · model-written summary
Weed infestation throughout the season reduced chickpea seed yield by 78.5-85.7% versus weed-free treatment.
- Taxon
- chickpeaCicer arietinume0
- Treatment
- weed infested conditions for the entire growing seasone0
- Outcome
- seed yielde0
- Direction
- reductione0
- Value
- 78.5-85.7%e0
- Comparator
- full-season weed-free treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“weed infested conditions for the entire growing season led to 76.4-85.8% and 78.5-85.7% reduction in chickpea dry matter and seed yield compared with full-season weed-free treatments”
Claim · model-written summary
The main weeds were four named species.
- Taxon
- ChickpeaCicer arietinumt0
- Interactor
- Stachys byzantinee0weed
- Outcome
- major weedse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the major weeds in experiment were Stachys byzantine, Tragopogon dubius, Gypsophila pilosa and Euphorbia helioscpia”
t0“Chickpea”
Claim · model-written summary
Weeds could grow 43 days after emergence before chickpea yield loss exceeded 10%.
- Taxon
- ChickpeaCicer arietinumt0
- Outcome
- yielde0
- Value
- 43e0
- Qualifier
- >10%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“To prevent >10% yield and total dry matter loss, the maximum time weeds could be allowed to grow after crop emergence were 43 and 36 DAE respectively”
t0“Chickpea”
Claim · model-written summary
Weeds could grow 36 days after emergence before chickpea dry matter loss exceeded 10%.
- Taxon
- ChickpeaCicer arietinumt0
- Outcome
- total dry matter losse0
- Value
- 36 DAEe0
- Qualifier
- >10%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“To prevent >10% yield and total dry matter loss, the maximum time weeds could be allowed to grow after crop emergence were 43 and 36 DAE respectively”
t0“Chickpea”
Claim · model-written summary
At 5% yield loss, the critical weed control period was 36-60 DAE.
- Taxon
- ChickpeaCicer arietinumt0
- Outcome
- yielde0
- Value
- 36-60 DAEe0
- Qualifier
- 5 %e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“critical period for weed control at 5 % yield and total dry matter loss was 36-60 DAE and 26-71 DAE”
t0“Chickpea”
Claim · model-written summary
At 5% dry matter loss, the critical weed control period was 26-71 DAE.
- Taxon
- ChickpeaCicer arietinumt0
- Outcome
- total dry matter losse0
- Value
- 26-71 DAEe0
- Qualifier
- 5 %e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“critical period for weed control at 5 % yield and total dry matter loss was 36-60 DAE and 26-71 DAE”
t0“Chickpea”
Claim · model-written summary
At 2.5% loss, the critical weed control period was wider than at higher loss levels.
- Taxon
- ChickpeaCicer arietinumt0
- Outcome
- critical periode0
- Direction
- widespreadere0
- Qualifier
- 2.5 %e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“critical period at 2.5 % yield and total dry matter loss was widespreader than other loss level”
t0“Chickpea”
Claim · model-written summary
The authors recommend weed removal at 19-80 DAE to minimize chickpea yield loss.
- Taxon
- ChickpeaCicer arietinumt0
- Outcome
- removal weeds must be done at 19-80 DAEe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“to minimizing loss level of yield removal weeds must be done at 19-80 DAE”
t0“Chickpea”
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