为了明确除草型育秧麻地膜对秧田杂草的防控效果及对水稻的安全性,为集中育秧提供有效的杂草防控措施,本研究采用培养皿法和小区实验研究了五氟磺草胺、苄嘧磺隆、吡嘧磺隆、丙草胺四种除草剂附着于麻地膜上对稗草和水稻出苗、秧苗生长...为了明确除草型育秧麻地膜对秧田杂草的防控效果及对水稻的安全性,为集中育秧提供有效的杂草防控措施,本研究采用培养皿法和小区实验研究了五氟磺草胺、苄嘧磺隆、吡嘧磺隆、丙草胺四种除草剂附着于麻地膜上对稗草和水稻出苗、秧苗生长及杂草防控效果和水稻产量的影响。室内生物测定结果显示,24~96 h内,五氟磺草胺、苄嘧磺隆、吡嘧磺隆和丙草胺均能不同程度抑制稗草和水稻种子萌发,且对稗草种子萌发的抑制率高于水稻种子;96 h时,五氟磺草胺、苄嘧磺隆、吡嘧磺隆3种药剂高剂量处理下的稗草和水稻呈现不同程度的中毒症状,主要表现为抑制根和芽生长及鲜重降低;高剂量丙草胺下,稗草和水稻均死亡。在此基础上,2018—2020年通过田间试验研究了五氟磺草胺15 g a.i.hm^(-2)、苄嘧磺隆30 g a.i.hm^(-2)、吡嘧磺隆15 g a.i.hm^(-2)附着麻地膜时对秧田杂草的控制效果及对水稻的安全性,结果显示,除草剂附着的麻地膜对秧田杂草的防控效果比较理想,株防效达80%~90%,与对照药剂丙草胺相当;在水稻安全性方面,3种除草剂附膜30 d时,对水稻秧苗的株高和鲜重均有一定的促进作用;产量上,施药区稻谷千粒重和每公顷产量均增加,2018年增产率为0.57%~2.13%,2019年和2020年增产率分别为0.55%~1.70%和2.87%~6.21%,与对照药剂丙草胺相当。水稻育秧中可采用五氟磺草胺、苄嘧磺隆、吡嘧磺隆附着麻地膜育秧膜控制田间杂草,在合理剂量范围内对秧苗安全,不影响水稻产量,在集中育秧中应用前景广阔。展开更多
The title compound N-（pyridin-2-ylmethyl）- 1-phenyl- 1,4,5,6,7,8-hexahydrocy-clohepta[c]pyrazole-3-carboxamide 5 （C21I-I22N40, Mr = 346.42） has been synthesized andstructurally characterized by IR, 1H NMR, 13C NMR...The title compound N-（pyridin-2-ylmethyl）- 1-phenyl- 1,4,5,6,7,8-hexahydrocy-clohepta[c]pyrazole-3-carboxamide 5 （C21I-I22N40, Mr = 346.42） has been synthesized andstructurally characterized by IR, 1H NMR, 13C NMR, H RMS and single-crystal X-raydiffraction. The crystal crystallizes in monoclinic system, space group P21/n with a = 8.668（2）,b = 22.236（4）, c = 9.539（2） A, β = 108.68（3）°, V = 1786.4（7）/k3, Z = 4, Dx= 1.288 g/cm3,F（000） = 736,μ（MoKa） = 0.649 mm^-1, the final R = 0.0354 and wR = 0.0933 with 3234observed reflections with I 〉 2σ（/）. The benzene and pyrazole rings are nearly coplanar with adihedral angle of 50.977（46）°. The dihedral angle between the central pyrazole and pyridinerings is 11.688（46）°. No classical hydrogen bonds were found in the molecules. Two adjacentmolecules in crystal packing of compound 5 were linked by two intramolecularhydrogen-bonding interactions C（15）-H（15）…O（1） to generate a stable structure. Compound 5had weak insecticidal activity against the diamondback moth （Plutella xylostella）, butexhibited good activity against cotton bollworm （Helicoverpa armigera）.展开更多
文摘为了明确除草型育秧麻地膜对秧田杂草的防控效果及对水稻的安全性,为集中育秧提供有效的杂草防控措施,本研究采用培养皿法和小区实验研究了五氟磺草胺、苄嘧磺隆、吡嘧磺隆、丙草胺四种除草剂附着于麻地膜上对稗草和水稻出苗、秧苗生长及杂草防控效果和水稻产量的影响。室内生物测定结果显示,24~96 h内,五氟磺草胺、苄嘧磺隆、吡嘧磺隆和丙草胺均能不同程度抑制稗草和水稻种子萌发,且对稗草种子萌发的抑制率高于水稻种子;96 h时,五氟磺草胺、苄嘧磺隆、吡嘧磺隆3种药剂高剂量处理下的稗草和水稻呈现不同程度的中毒症状,主要表现为抑制根和芽生长及鲜重降低;高剂量丙草胺下,稗草和水稻均死亡。在此基础上,2018—2020年通过田间试验研究了五氟磺草胺15 g a.i.hm^(-2)、苄嘧磺隆30 g a.i.hm^(-2)、吡嘧磺隆15 g a.i.hm^(-2)附着麻地膜时对秧田杂草的控制效果及对水稻的安全性,结果显示,除草剂附着的麻地膜对秧田杂草的防控效果比较理想,株防效达80%~90%,与对照药剂丙草胺相当;在水稻安全性方面,3种除草剂附膜30 d时,对水稻秧苗的株高和鲜重均有一定的促进作用;产量上,施药区稻谷千粒重和每公顷产量均增加,2018年增产率为0.57%~2.13%,2019年和2020年增产率分别为0.55%~1.70%和2.87%~6.21%,与对照药剂丙草胺相当。水稻育秧中可采用五氟磺草胺、苄嘧磺隆、吡嘧磺隆附着麻地膜育秧膜控制田间杂草,在合理剂量范围内对秧苗安全,不影响水稻产量,在集中育秧中应用前景广阔。
基金financially supported by the National Key Research and Development Plan(No.2017YFD0200504)Hunan Provincial Science and Technology Plan Project(No.2016RS2012)
文摘The title compound N-（pyridin-2-ylmethyl）- 1-phenyl- 1,4,5,6,7,8-hexahydrocy-clohepta[c]pyrazole-3-carboxamide 5 （C21I-I22N40, Mr = 346.42） has been synthesized andstructurally characterized by IR, 1H NMR, 13C NMR, H RMS and single-crystal X-raydiffraction. The crystal crystallizes in monoclinic system, space group P21/n with a = 8.668（2）,b = 22.236（4）, c = 9.539（2） A, β = 108.68（3）°, V = 1786.4（7）/k3, Z = 4, Dx= 1.288 g/cm3,F（000） = 736,μ（MoKa） = 0.649 mm^-1, the final R = 0.0354 and wR = 0.0933 with 3234observed reflections with I 〉 2σ（/）. The benzene and pyrazole rings are nearly coplanar with adihedral angle of 50.977（46）°. The dihedral angle between the central pyrazole and pyridinerings is 11.688（46）°. No classical hydrogen bonds were found in the molecules. Two adjacentmolecules in crystal packing of compound 5 were linked by two intramolecularhydrogen-bonding interactions C（15）-H（15）…O（1） to generate a stable structure. Compound 5had weak insecticidal activity against the diamondback moth （Plutella xylostella）, butexhibited good activity against cotton bollworm （Helicoverpa armigera）.
