Pyrazosulfuron-ethyl is a widely known and commonly used herbicide, especially in rice fields, where it shows excellent efficacy. Let's delve into the specific weeds that pyrazosulfuron-ethyl effectively controls.
Effectiveness of Pyrazosulfuron-Ethyl on Various Weeds
Pyrazosulfuron-ethyl has a broad spectrum of weed control, effectively targeting weeds such as barnyardgrass, rice barnyardgrass, Leersia hexandra, Echinochloa crus-galli, Echinochloa oryzicola, Monochoria vaginalis, Ludwigiopsis octovalvis, Alternanthera philoxeroides, Houttuynia cordata, Hydrocotyle umbellata, Cyperus esculentus, Cyperus difformis, Cyperus iria, and Scirpus juncoides, among others.
Characteristics of Pyrazosulfuron-Ethyl
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Systemic Action: Pyrazosulfuron-ethyl is rapidly absorbed by the stems and leaves of weeds, effectively translocating within the plant to achieve weed control.
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Delayed Weed Death: While the effects of pyrazosulfuron-ethyl are not immediate, weeds typically die within 7-15 days after application; perennial weeds may take longer.
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Low Residual Effects: Pyrazosulfuron-ethyl readily degrades in soil after application in rice fields, minimizing soil accumulation and reducing environmental pollution. It degrades faster under flooded conditions.
Usage Recommendations for Pyrazosulfuron-Ethyl
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Photoperiod Sensitivity: Pyrazosulfuron-ethyl is a photodegradable herbicide and must be applied under light conditions to be effective.
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Application Timing in Rice Fields: Apply pyrazosulfuron-ethyl after the rice has reached the 2-leaf stage and the weeds are in the 3-5 leaf stage.
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Strict Dosage Control: Follow recommended dosage rates based on weed size—lower rates for smaller weeds and higher rates for larger ones.
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Compatibility: Do not mix pyrazosulfuron-ethyl with contact herbicides like propanil or glufosinate, or systemic herbicides like bensulfuron-methyl or bispyribac-sodium. Allow at least 7 days between applications.
In conclusion, pyrazosulfuron-ethyl is an excellent herbicide effective against a wide range of weeds, making it suitable for use in rice fields.
