[Objective] The aim was to study the effect of three new fungicides against rice sheath blight in field experiment. [Methods] The experiment set up 7 treatments with three times of repetition and designed by random gr...[Objective] The aim was to study the effect of three new fungicides against rice sheath blight in field experiment. [Methods] The experiment set up 7 treatments with three times of repetition and designed by random grouping. By using 5 sampling points in each plot, and investigating continuous 4 holes of each point, total plants, diseased plants and disease degrees were recorded. Then disease index and control efficiency were calculated, and variance analysis was carried out. [Results] 300 or 450 ml/hm^2 azoxystrobin ＋ difenoconazole 325 g/L SC had better control efficiency to rice sheath blight and had no phytotoxicity effect, we should use it at the initial disease stage and continuously spray 2-3 times. [Conclusion] The experiment provided a theoretical basis for controlling rice sheath blight using fungicides.展开更多
[Objective] To introduce a convenient and easy way for the statistical anal- ysis on field efficacy trials of pesticide by using Visual Basic. [Method] The calcula- tion procedure of using Visual Basic to conduct stat...[Objective] To introduce a convenient and easy way for the statistical anal- ysis on field efficacy trials of pesticide by using Visual Basic. [Method] The calcula- tion procedure of using Visual Basic to conduct statistical analysis on the field efficacy of pesticides was introduced, and an example was used to illustrate the usage and skill of the program. [Result] The procedure could quickly and accurately con- duct statistical analysis on the field efficacy of pesticide by only inputting initial data of the test, and it could compare the significance of differences between various fac- tors. Its calculated results were consistent with the results of the specialized statisti- cal software DPS. [Conclusion] It is a quick and simple method with high accuracy and reliability, which can greatly improve the efficiency of pesticide formulation opti- mization.展开更多
In the research, 5% imidacloprid oil at different doses were applied to prevent Myzus persicae in order to explore significance analysis in 3, 7, 14, and 20 d, respectively, in three fields, and the results showed tha...In the research, 5% imidacloprid oil at different doses were applied to prevent Myzus persicae in order to explore significance analysis in 3, 7, 14, and 20 d, respectively, in three fields, and the results showed that 5% imidacloprid oil per- formed significant for K326, G28 and Yunyan-87, suggesting 5% imidacloprid oil is effective in controlling Myzus persicae.展开更多
Residues of 14C--f e.itrothio. in a model rice--fish ecosystem and field rice--fish ecosystem were studied. When equal amounts of the pesticide were applied, the extractable residues in brown rice (equivalent to 34.3f...Residues of 14C--f e.itrothio. in a model rice--fish ecosystem and field rice--fish ecosystem were studied. When equal amounts of the pesticide were applied, the extractable residues in brown rice (equivalent to 34.3f 1.9 μg / kg fenitrothion) and rice stems and leaves (20.9± 1.5 μg / kg) of the model rice-fish ecosystem were 10-15times higher than that of the field rice-fish ecosystem(4.48 ± 0.13 μg / kg and 1.27 ±0.34 μg / kg respectively). Residues in upper part of the soil (6.50± 0.1- 8.10±0.2 μg / kg) and lower part of the soil (1.30± 0.1-1.50±0.1μg / kg) of the model rice-fish ecosystem were 10-40 times higher than that of the field rice-fish ecosystem (0.17 ±0.01 μg / kg). The extractable residues in paddy water of the model ecosystem (0.30 ± 0.01 μg / kg) were similar to that of the field ecosystem (0.20 ± 0.02 μg / kg). Whenthe fenitrothion was sprayed on the rice plants, residues in brown rice, fish body, soiland paddy water were lower than those when the pesticide was sprayed on the surfaceof the soil.展开更多
文摘[Objective] The aim was to study the effect of three new fungicides against rice sheath blight in field experiment. [Methods] The experiment set up 7 treatments with three times of repetition and designed by random grouping. By using 5 sampling points in each plot, and investigating continuous 4 holes of each point, total plants, diseased plants and disease degrees were recorded. Then disease index and control efficiency were calculated, and variance analysis was carried out. [Results] 300 or 450 ml/hm^2 azoxystrobin ＋ difenoconazole 325 g/L SC had better control efficiency to rice sheath blight and had no phytotoxicity effect, we should use it at the initial disease stage and continuously spray 2-3 times. [Conclusion] The experiment provided a theoretical basis for controlling rice sheath blight using fungicides.
基金Supported by the Scientific and Technological Foundation for Special Basic Research of Chinese Academy of Tropical Agricultural Science(2012hzs1J002)the National Natural Science Foundation of China(31101465)the Research Fund for Welfare Industry(Agriculture)(201103026)~~
文摘[Objective] To introduce a convenient and easy way for the statistical anal- ysis on field efficacy trials of pesticide by using Visual Basic. [Method] The calcula- tion procedure of using Visual Basic to conduct statistical analysis on the field efficacy of pesticides was introduced, and an example was used to illustrate the usage and skill of the program. [Result] The procedure could quickly and accurately con- duct statistical analysis on the field efficacy of pesticide by only inputting initial data of the test, and it could compare the significance of differences between various fac- tors. Its calculated results were consistent with the results of the specialized statisti- cal software DPS. [Conclusion] It is a quick and simple method with high accuracy and reliability, which can greatly improve the efficiency of pesticide formulation opti- mization.
文摘In the research, 5% imidacloprid oil at different doses were applied to prevent Myzus persicae in order to explore significance analysis in 3, 7, 14, and 20 d, respectively, in three fields, and the results showed that 5% imidacloprid oil per- formed significant for K326, G28 and Yunyan-87, suggesting 5% imidacloprid oil is effective in controlling Myzus persicae.
文摘Residues of 14C--f e.itrothio. in a model rice--fish ecosystem and field rice--fish ecosystem were studied. When equal amounts of the pesticide were applied, the extractable residues in brown rice (equivalent to 34.3f 1.9 μg / kg fenitrothion) and rice stems and leaves (20.9± 1.5 μg / kg) of the model rice-fish ecosystem were 10-15times higher than that of the field rice-fish ecosystem(4.48 ± 0.13 μg / kg and 1.27 ±0.34 μg / kg respectively). Residues in upper part of the soil (6.50± 0.1- 8.10±0.2 μg / kg) and lower part of the soil (1.30± 0.1-1.50±0.1μg / kg) of the model rice-fish ecosystem were 10-40 times higher than that of the field rice-fish ecosystem (0.17 ±0.01 μg / kg). The extractable residues in paddy water of the model ecosystem (0.30 ± 0.01 μg / kg) were similar to that of the field ecosystem (0.20 ± 0.02 μg / kg). Whenthe fenitrothion was sprayed on the rice plants, residues in brown rice, fish body, soiland paddy water were lower than those when the pesticide was sprayed on the surfaceof the soil.
