Abstract
We aimed with this work to evaluate the efficiency of the herbicide [imazapic + imazapyr] in the weed control, especially of the jointvetch, and its reflex in rice plant establishment and grain yield. A field study was conducted, where treatments were: control without herbicide application; Kifix® 140g ha-1 (24.5 ga.i. ha-1 imazapic + 73.5 ga.i. ha-1 imazapyr) and Kifix® 280 g ha-1 (49 ga.i. ha-1 imazapic + 147 ga.i. ha-1 imazapyr). We evaluated crop emergence up to 25 days after sowing, crop plant height 12 days after emergence (DAE), jointvetch plant density 31 and 62 DAE, jointvetch dry mass 62 DAE and general weed infestation 62 DAE. At the end of the crop cycle we evaluated grains per panicle, panicle and 1000 grain weight, panicle density and crop grain yield. There is a risk of 15% reduction in the establishment of Clearfield® rice plants when the maximum dose of the herbicide [imazapic + imazapyr] is applied pre-emergence, but under appropriate conditions, the crop development tends to compensate for this reduction in establishment. The herbicide [imazapic + imazapyr] is effective on jointvetch, but under high infestation conditions, as in the present study, a complementary herbicide application is required to achieve adequate control of jointvetch and avoid rice grain yield reduction due to competition.
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Claims 4
Claim · model-written summary
Maximum pre-emergence herbicide dose risked 15% reduction in Clearfield rice establishment.
- Taxon
- rice
Oryza sativae0 - Material
- Clearfield®e0
- Treatment
- maximum dose of the herbicide [imazapic + imazapyr]e0
- Outcome
- establishmente0
- Direction
- reductione0
- Value
- 15%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There is a risk of 15% reduction in the establishment of Clearfield® rice plants when the maximum dose of the herbicide [imazapic + imazapyr] is applied pre-emergence”
Claim · model-written summary
Rice development tended to compensate for reduced establishment under appropriate conditions.
- Taxon
- RiceOryza sativat0
- Outcome
- crop development tends to compensate for this reduction in establishmente0
- Qualifier
- under appropriate conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“under appropriate conditions, the crop development tends to compensate for this reduction in establishment”
t0“Rice”
Claim · model-written summary
Imazapic plus imazapyr was effective against jointvetch.
- Taxon
- RiceOryza sativat0
- Treatment
- [imazapic + imazapyr]e0
- Interactor
- jointvetche0weed
- Outcome
- effective on jointvetche0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The herbicide [imazapic + imazapyr] is effective on jointvetch”
t0“Rice”
Claim · model-written summary
The authors recommended complementary herbicide under high jointvetch infestation to avoid rice yield reduction.
- Taxon
- riceOryza sativae0
- Interactor
- jointvetche0weed
- Outcome
- complementary herbicide application is requirede0
- Qualifier
- under high infestation conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“under high infestation conditions, as in the present study, a complementary herbicide application is required to achieve adequate control of jointvetch and avoid rice grain yield reduction due to competition.”
The same questions in other papers
imazapyr · growth · Oryza sativa (rice)Results agree
1 paper in the same direction as this paper
- negative
herbicide · growth · Oryza sativa (rice)Results differ
30 papers in the same direction as this paper · 92 in the opposite direction
- positive
- positive
- positive
119 papers more in this group
See all 123 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.