[目的]筛选出防治水稻稻瘟病的有效杀菌剂及其混剂,为实际生产提供依据。[方法]采用菌丝生长速率法测定15种杀菌剂及4种药剂的5个配比对稻瘟病菌的毒力,喷雾法进行田间防效试验。[结果]吡唑醚菌酯、三环唑、戊唑醇、咪鲜胺具有较好的抑...[目的]筛选出防治水稻稻瘟病的有效杀菌剂及其混剂,为实际生产提供依据。[方法]采用菌丝生长速率法测定15种杀菌剂及4种药剂的5个配比对稻瘟病菌的毒力,喷雾法进行田间防效试验。[结果]吡唑醚菌酯、三环唑、戊唑醇、咪鲜胺具有较好的抑菌效果,EC50值分别为0.46、1.92、5.23、7.14 mg/L。将其4种药剂进行复配,结果表明吡唑醚菌酯与三环唑质量比为1颐3时对水稻稻瘟病菌的作用效果较好,EC50值为0.23 mg/L,增效系数为2.14,具有明显的增效作用。将吡唑醚菌酯与三环唑按质量比1颐3制成25%吡唑醚菌酯·三环唑WP,在40 g a.i./hm2剂量下对水稻稻瘟病的田间防效为92.9%。[结论]吡唑醚菌酯及其增效混剂对水稻稻瘟病有优异的防效,为更有针对性地防治水稻稻瘟病奠定基础。展开更多
The properties of water and their changes under the action of a magnetic field were gathered by the spectrum techniques of infrared, Raman, visible, ultraviolet and X-ray lights, which may give an insight into molecul...The properties of water and their changes under the action of a magnetic field were gathered by the spectrum techniques of infrared, Raman, visible, ultraviolet and X-ray lights, which may give an insight into molecular and atomic structures of water. It was found that some properties of water were changed, and a lot of new and strange phenomena were discovered after magnetization. Magnetized water really has magnetism, which has been verified by a peak shift of X-ray diffraction of magnetized water + Fe3O4 hybrid relative to that of pure water + Fe3O4 hybrid, that is a saturation and memory effect. The properties of infrared and ultraviolet absorptions, Raman scattering and X-ray diffraction of magnetized water were greatly changed relative to those of pure water; their strengths of peaks were all increased, the frequencies of some peaks did also shift, and some new peaks, for example, at 5198, 8050 and 9340 cm?1, occurred at 25°C after water was magnetized. In the meanwhile, the magnetized effects of water are related to the magnetized time, the intensity of an externally applied magnetic field, and the temperature of water, but they are not a linear relationship. The study also showed a lot of new and unusual properties of magnetized water, for example, the six peaks in 3000–3800 cm?1 in infrared absorption, the exponential increase of ultraviolet absorption of wave with the decreasing wavelength of light of 200–300 nm, the frequency-shifts of peaks, a strange irreversible effect in the increasing and decreasing processes, as well as a stronger peak of absorption occurring at 50°C, 70°C and 80°C, the existence of many models of motion from 85°C to 95°C in 8000–10000 cm?1, and so on. These results show that the molecular structure of water is very complicated, which needs further study. Furthermore, the macroscopic feature of mechanics, for instance, surface tension force of magnetized water, was also measured. Experiments discovered that the size in contact angles of magnetized water on the surface展开更多
文摘[目的]筛选出防治水稻稻瘟病的有效杀菌剂及其混剂,为实际生产提供依据。[方法]采用菌丝生长速率法测定15种杀菌剂及4种药剂的5个配比对稻瘟病菌的毒力,喷雾法进行田间防效试验。[结果]吡唑醚菌酯、三环唑、戊唑醇、咪鲜胺具有较好的抑菌效果,EC50值分别为0.46、1.92、5.23、7.14 mg/L。将其4种药剂进行复配,结果表明吡唑醚菌酯与三环唑质量比为1颐3时对水稻稻瘟病菌的作用效果较好,EC50值为0.23 mg/L,增效系数为2.14,具有明显的增效作用。将吡唑醚菌酯与三环唑按质量比1颐3制成25%吡唑醚菌酯·三环唑WP,在40 g a.i./hm2剂量下对水稻稻瘟病的田间防效为92.9%。[结论]吡唑醚菌酯及其增效混剂对水稻稻瘟病有优异的防效,为更有针对性地防治水稻稻瘟病奠定基础。
基金the National Basic Research Program of China (Grant No. 2007CB936103)
文摘The properties of water and their changes under the action of a magnetic field were gathered by the spectrum techniques of infrared, Raman, visible, ultraviolet and X-ray lights, which may give an insight into molecular and atomic structures of water. It was found that some properties of water were changed, and a lot of new and strange phenomena were discovered after magnetization. Magnetized water really has magnetism, which has been verified by a peak shift of X-ray diffraction of magnetized water + Fe3O4 hybrid relative to that of pure water + Fe3O4 hybrid, that is a saturation and memory effect. The properties of infrared and ultraviolet absorptions, Raman scattering and X-ray diffraction of magnetized water were greatly changed relative to those of pure water; their strengths of peaks were all increased, the frequencies of some peaks did also shift, and some new peaks, for example, at 5198, 8050 and 9340 cm?1, occurred at 25°C after water was magnetized. In the meanwhile, the magnetized effects of water are related to the magnetized time, the intensity of an externally applied magnetic field, and the temperature of water, but they are not a linear relationship. The study also showed a lot of new and unusual properties of magnetized water, for example, the six peaks in 3000–3800 cm?1 in infrared absorption, the exponential increase of ultraviolet absorption of wave with the decreasing wavelength of light of 200–300 nm, the frequency-shifts of peaks, a strange irreversible effect in the increasing and decreasing processes, as well as a stronger peak of absorption occurring at 50°C, 70°C and 80°C, the existence of many models of motion from 85°C to 95°C in 8000–10000 cm?1, and so on. These results show that the molecular structure of water is very complicated, which needs further study. Furthermore, the macroscopic feature of mechanics, for instance, surface tension force of magnetized water, was also measured. Experiments discovered that the size in contact angles of magnetized water on the surface
