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Kwang‐Hyeon Liu Joon‐Kwan Moon Ha‐Jung Sung Seung‐Hun Kang Suk‐Jin Koo Hye‐Suk Lee Jeong‐Han Kim 《Pest management science》2001,57(12):1155-1160
Pyribenzoxim, benzophenone O‐[2,6‐bis(4,6‐dimethoxypyrimidin‐2‐yloxy)benzoyl]oxime, is a new post‐emergence herbicide providing broad‐spectrum weed control in rice fields. [14C]Pyribenzoxim was used to study the pharmacokinetics of the compound after oral administration of a dose of 1000 mg kg?1 to male Sprague–Dawley rats. The material balance ranged from 97.3 to 99.7% of the administered dose and urinary and fecal recovery accounted for 97.1%, with the majority of radioactivity recovered in feces (88.6%) by 168 h after treatment. Elimination as volatile products or as carbon dioxide was negligible. The following values were obtained for the compound in the blood: AUC0–168h, 28400 µg equiv h g?1; Tmax, 12 h; Cmax, 372 µg equiv g?1; half‐life, 53 h. Radioactivity in tissue decreased from 96.1% of applied radiocarbon at 6 h to 0.4% at 168 h and the highest concentration of radioactivity among the tissues was observed in liver while the lowest residues were found in brain. The elimination half‐lives of radioactivity from tissues was in the range of 7 to 77 h and Tmax values of 12, 24 and 12 h were observed for blood, liver and kidney, respectively. Except for that in the digestive tract, the tissue‐to‐blood ratio (TBR) was highest in the liver. © 2001 Society of Chemical Industry 相似文献
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Three field trials were conducted from 2003–2004 at Utsunomiya University, Japan, to evaluate the safety and herbicidal activity of pyribenzoxim (benzophenone O -[2,6-bis[(4,6-dimethoxy-2-pyrimidinyl)oxybenzoyl]oxime) in turfgrass. Pyribenzoxim showed a high level of safety in bentgrass ( Agrostis palustris Huds.) and zoysiagrass ( Zoysia matrella ) ≤ 300 g ai ha−1 and it controlled various major grass weeds, including annual bluegrass ( Poa annua L.), large crabgrass ( Digitaria sanguinalis L.), and green foxtail ( Setaria viridis L.), and broadleaf weeds, including common dandelion ( Taraxacum officinale Weber), horseweed ( Erigeron canadensis L.), shepherd's-purse ( Capsella bursa-pastoris (L.) Medic.), common chickweed ( Stellaria media L.), common lambsquarters ( Chenopodium album L.), creeping woodsorrel ( Oxalis corniculata L.), and common dayflower ( Commelina communis L.) by fall or spring application. In comparison with bispyribac-sodium (sodium 2,6-[bis(4,6-dimethoxy-2-pyrimidin-2-yl)oxy]benzoate), pyribenzoxim showed a higher safety level in bentgrass and a stronger herbicidal activity on grass weeds; in particular, annual bluegrass and large crabgrass. 相似文献
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Pot and field tests were conducted to evaluate the efficacy of pyribenzoxim for winter weeds in wheat. In the pot tests, pyribenzoxim, at 50 g ha−1 , controlled certain biotypes of blackgrass, including a fenoxaprop-P-ethyl-resistant biotype (the "Notts" biotype). A chlorotoluron-resistant blackgrass (the "Peldon" biotype) was not controlled. Cleaver, at the three-to-four-leaf stage, was completely controlled by pyribenzoxim at 30 g ha−1 . In the field, the application in December gave good control of common chickweed, but did not control other weeds. No damage to wheat was observed with this rate of pyribenzoxim in December. The application in March gave complete control of blackgrass , hairy chess, and soft brome at 70 g ha−1 , and cleaver at 140 g ha−1 . The partial control of corn poppy and field violet was achieved. The March application scorched the wheat at 50–70 g ha−1 , with prolonged stunting at 100–140 g ha−1 . In conclusion, it was shown that pyribenzoxim had potential as a wheat herbicide, but needed further fine-tuning to find an optimum dosage. 相似文献
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Suk Jin Koo Sei-Chang Ahn Jae Suk Lim Sang Hern Chae Jung Soo Kim Jae Hwan Lee Jin Ho Cho 《Pest management science》1997,51(2):109-114
Herbicidal characteristics of the experimental compound LGC-40863 (ISO proposed common name: pyribenzoxim) were investigated in greenhouse and field. In the greenhouse, LGC-40863 had strong post-emergent activity on various grass and broadleaf weeds including Echinochloa crus-galli L. Beauv., Alopecurus myosuroides Huds. and Polygonum hydropiper L., while it was safe in rice (Oryza sativa L.), wheat (Triticum aestivum L.) and zoysiagrass (Zoysia japonica Steud; (a turf species). Among important rice weeds, E. crus-galli was controlled over a wide window from the one-leaf to the six-leaf stages. In the field, LGC-40863 provided excellent control of E. crus-galli (>95%) at 30 to 40 g ha-1 when applied alone, or at 15 to 30 g ha-1 when applied in combination with pendimethalin, while it did not cause injury to rice at up to 60 g ha-1. These results suggest that LGC-40863 has potential as a new selective post-emergent herbicide in rice. © 1997 SCI 相似文献
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嘧啶肟草醚5%乳油在水稻环境中残留行为研究 总被引：1，自引：0，他引：1
嘧啶肟草醚在水稻环境中残留行为研究已在河南郑州和云南昆明田间小区内进行。样品采用丙酮振荡提取,凝结净化和高效液相色谱检测。结果表明,本方法的添加回收率范围为85.5%～101.4%;相对标准偏差(RSD)为1%～19%。其灵敏度、准确度和精密度均符合农药残留试验准则要求。两年两地的检测结果显示,无论是在南方云南或是中原河南,低剂量30g,a.i·hm-2或是高剂量60g,a.i·hm-2,采收间隔期83d或118d,其糙米中的最终残留均低于最低检测浓度(0.01mg·kg-1)。因此建议在水稻生长期,按推荐药剂量(30～60g,a.i·hm-2)施药一次,安全间隔期83d,收获的水稻食用是安全的。嘧啶肟草醚在糙米中的最大允许残留量限(MRL值)暂定为1mg·kg-1。 相似文献
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