Abstract
The effect of herbicides on weed suppression, crop growth and yield in transplanted rice were evaluated in at Agricultural Farm of Palli Siksha Bhavana, Visva-Bharati, Sriniketan during boro season of 2018 and 2019. Eight different weed management treatments comprised of pretilachlor 50 EC @ 500 g ha-1 and pyrazosulfuron ethyl 10 WP @ 30 g ha-1 as pre- emergence; ethoxysulfuron 15 WDG @ 15 g ha-1 and penoxsulam 21.7 SC @ 22.5 g ha-1 as early post emergence, bispyribac-sodium 10 SC @ 25 g ha-1 as post emergence, hand weeding at 20 and 40 DAT, weed free check and weedy check. Results revealed that pyrazosulfuron ethyl 30 at g ha-1 and pretilachlor at 500 g ha-1 resulted lower population and dry matter accumulation of weeds as well as increased plant height, dry matter accumulation, leaf area index and grain yield (6.09 and 5.99 t ha-1 in 2018 and 5.86 and 5.63 t ha-1 in 2019, respectively). Pretilachlor at 500 g ha-1 and pyrazosulfuron ethyl 30 at g ha-1 increased grain yield over other herbicidal treatments in both the years. The maximum loss of grain yield due to unrestrained weeds in transplanted summer rice was 55.85% and 52.3% in 2018 and 2019, respectively. Hand weeding done at 20 and 40 DAT also controlled weeds efficiently but recorded lower net return and return per rupee invested than pyrazosulfuron ethyl 30 at g ha-1 and pretilachlor at 500 g ha-1 where net return was higher (Rs. 94425 ha-1 and Rs. 92909 ha-1 in 2018; and Rs. 91206 ha-1 and Rs. 86926 ha-1 in 2019, respectively) and return per rupee invested (Rs. 3.64 and Rs. 3.63 in 2018; and Rs. 3.40 and Rs. 3.32 in 2019, respectively).
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Claims 7
Claim · model-written summary
Pyrazosulfuron ethyl lowered weed population and dry matter.
- Taxon
- rice
Oryza sativat0 - Treatment
- pyrazosulfuron ethyl 30 at g ha-1e0
- Interactor
- weedse0weed
- Outcome
- population and dry matter accumulation of weedse0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pyrazosulfuron ethyl 30 at g ha-1 and pretilachlor at 500 g ha-1 resulted lower population and dry matter accumulation of weeds”
t0“boro rice”
Claim · model-written summary
Pretilachlor lowered weed population and dry matter.
- Taxon
- riceOryza sativat0
- Treatment
- pretilachlor at 500 g ha-1e0
- Interactor
- weedse0weed
- Outcome
- population and dry matter accumulation of weedse0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pyrazosulfuron ethyl 30 at g ha-1 and pretilachlor at 500 g ha-1 resulted lower population and dry matter accumulation of weeds”
t0“boro rice”
Claim · model-written summary
Pyrazosulfuron ethyl raised rice height, dry matter and leaf area index.
- Taxon
- riceOryza sativat0
- Treatment
- pyrazosulfuron ethyl 30 at g ha-1e0
- Outcome
- plant height, dry matter accumulation, leaf area indexe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pyrazosulfuron ethyl 30 at g ha-1 and pretilachlor at 500 g ha-1 resulted lower population and dry matter accumulation of weeds as well as increased plant height, dry matter accumulation, leaf area index”
t0“boro rice”
Claim · model-written summary
Pretilachlor raised rice height, dry matter and leaf area index.
- Taxon
- riceOryza sativat0
- Treatment
- pretilachlor at 500 g ha-1e0
- Outcome
- plant height, dry matter accumulation, leaf area indexe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pretilachlor at 500 g ha-1 resulted lower population and dry matter accumulation of weeds as well as increased plant height, dry matter accumulation, leaf area index”
t0“boro rice”
Claim · model-written summary
Unrestrained weeds caused maximum grain yield losses of 55.85% in 2018 and 52.3% in 2019.
- Taxon
- riceOryza sativae0
- Interactor
- weedse0weed
- Outcome
- loss of grain yielde0
- Direction
- losse0
- Value
- 55.85% and 52.3%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maximum loss of grain yield due to unrestrained weeds in transplanted summer rice was 55.85% and 52.3% in 2018 and 2019, respectively”
Claim · model-written summary
Hand weeding at 20 and 40 DAT efficiently controlled weeds.
- Taxon
- riceOryza sativat0
- Treatment
- Hand weeding done at 20 and 40 DATe0
- Interactor
- weedse0weed
- Outcome
- weedse0
- Direction
- controllede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Hand weeding done at 20 and 40 DAT also controlled weeds efficiently”
t0“boro rice”
Claim · model-written summary
Hand weeding had lower net return and return per rupee invested than the two herbicides.
- Taxon
- riceOryza sativat0
- Treatment
- Hand weeding done at 20 and 40 DATe0
- Outcome
- net return and return per rupee investede0
- Direction
- lowere0
- Comparator
- pyrazosulfuron ethyl 30 at g ha-1 and pretilachlor at 500 g ha-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Hand weeding done at 20 and 40 DAT also controlled weeds efficiently but recorded lower net return and return per rupee invested than pyrazosulfuron ethyl 30 at g ha-1 and pretilachlor at 500 g ha-1”
t0“boro rice”
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