Claim · model-written summary
Ametryne and Simetryne gave the best control of weeds
- Taxon
- rice
Oryza sativae0 - Treatment
- Ametryne and Simetrynee1
- Outcome
- best control of weedse1
- Direction
- beste1
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“to evaluate the effectiveness of 13 herbicides and herbicide mixturers together with weedy and weeded checks for controlling weeds in rice”
e1“Ametryne and Simetryne gave best control of weeds, particularly of aquatic floating broadleaves which were apparently not killed by other chemicals”
Title
Comparative Study of Weed Control Methods in Rice
W. L. Chang 中華農業研究 1965. doi:10.29951/jarc.196503.0001
Other claims from this paper (18)
- Intervention effect Ametryne, PCP-Na and Simetryne severely injured rice
- Intervention effect Propanil gave poor control of weeds
- Intervention effect PCP-Na, MCPA and 2, 4-D did not control large grasses at the time of treatment
- Intervention effect Propanil and Swep were not toxic to rice under flooded condition
- Observation Broadleaved weeds dominated the weed population at the early stage of rice growth and were taken over by grasses at the late stage
- Observation Weed weight was primarily contributed by grasses
- Observation Sedges were not an important weed problem in rice
- Observation Weeds hastened the heading of rice
- Observation Chemical injury delayed the heading of rice
- Observation Plant height and tillering ability of rice were significantly reduced at the early stage of growth
- Intervention effect Herbicide treatments did not affect panicle length and grain weight of rice
- Association Weeds seemed to reduce the number of grains per panicle of rice
- Intervention effect DBN yielded 563 kg or 12.0% more grain than the weeded check
- Intervention effect DBN yielded 1,320 kg or 33.6% more grain than the weedy check, significant at the 1% level
- Intervention effect Weedy check reduced grain yield by 757 kg or 19.3% compared with the weeded check
- Intervention effect Ametryne gave the lowest grain yield, due to stand reduction caused by its toxicity to rice
- Intervention effect MCPCA, PCP-Na and Swep produced more grain yield than the weeded check
- Intervention effect Simetryne, Hydram and a mixture of Swep+MCPA produced more grain yield than the weeded check