为明确17%氰氟·二氯喹可分散油悬浮剂对直播稻田杂草的防效、应用技术,2015年开展了田间药效试验。结果表明,17%氰氟·二氯喹可分散油悬浮剂对稗草、鸭舌草和节节菜等杂草有较好的防除效果,极显著优于对照药剂10%氰氟草酯乳油...为明确17%氰氟·二氯喹可分散油悬浮剂对直播稻田杂草的防效、应用技术,2015年开展了田间药效试验。结果表明,17%氰氟·二氯喹可分散油悬浮剂对稗草、鸭舌草和节节菜等杂草有较好的防除效果,极显著优于对照药剂10%氰氟草酯乳油、25%二氯喹啉酸可湿性粉剂以及人工除草。且其对水稻生长安全。17%氰氟·二氯喹可分散油悬浮剂有效成分用量以255-306 m L/hm^2为宜,适宜施药期为水稻分蘖前期,稗草2-4叶期。展开更多
[Objective] To further improve the prediction and forecast and continuous control ability of broccoli clubroot disease. [Methods] The spatial distribution pattern of diseased or infected plants was analyzed using the ...[Objective] To further improve the prediction and forecast and continuous control ability of broccoli clubroot disease. [Methods] The spatial distribution pattern of diseased or infected plants was analyzed using the least square method, fre- quency distribution, aggregation index, m＊-m regression analysis and Taylor＇s pow- er law model. [Result] The field distribution of broccoli plants with clubroot disease tended to be aggregated distribution, m＇-m regression analysis showed that the el- ementary composition of the spatial distribution of diseased or infected plants was individual colony, the individuals attracted each other; the disease had obvious dis- ease focus in the field, and the individual colony showed uniform distribution pattern in the field. Taylor＇s power law showed that the spatial pattern of individual dis- eased or infected plant with clubroot disease tended to be uniform distribution with the increase of the density. On the basis of this, Iwao optimal theoretical sampling model and sequential sampling model were established, namely N =273.954 1/m- 59.698 5, To （N）=0.368 4N±1.926 8√N, respectively, it meant that when surveying N plants, if the accumulative incidence rate exceeded upper bound, the field can be set as control object; if the accumulative incidence rate didn＇t reach lower bound, it can be set as uncontrol field; if the accumulative incidence rate was between upper bound and lower bound, it should be surveyed continuously until the maximum sample size （mo=0.368 4） appeared, that was, the disease incidence was 15%, so the sampling number should be 684 plants. [Conclusion] The research results had very important instructive meaning for disease control.展开更多
文摘为明确17%氰氟·二氯喹可分散油悬浮剂对直播稻田杂草的防效、应用技术,2015年开展了田间药效试验。结果表明,17%氰氟·二氯喹可分散油悬浮剂对稗草、鸭舌草和节节菜等杂草有较好的防除效果,极显著优于对照药剂10%氰氟草酯乳油、25%二氯喹啉酸可湿性粉剂以及人工除草。且其对水稻生长安全。17%氰氟·二氯喹可分散油悬浮剂有效成分用量以255-306 m L/hm^2为宜,适宜施药期为水稻分蘖前期,稗草2-4叶期。
基金Supported by Agricultural Key Projects of Science and Technology Program of Taizhou City in Zhejiang Province(121KY17)~~
文摘[Objective] To further improve the prediction and forecast and continuous control ability of broccoli clubroot disease. [Methods] The spatial distribution pattern of diseased or infected plants was analyzed using the least square method, fre- quency distribution, aggregation index, m＊-m regression analysis and Taylor＇s pow- er law model. [Result] The field distribution of broccoli plants with clubroot disease tended to be aggregated distribution, m＇-m regression analysis showed that the el- ementary composition of the spatial distribution of diseased or infected plants was individual colony, the individuals attracted each other; the disease had obvious dis- ease focus in the field, and the individual colony showed uniform distribution pattern in the field. Taylor＇s power law showed that the spatial pattern of individual dis- eased or infected plant with clubroot disease tended to be uniform distribution with the increase of the density. On the basis of this, Iwao optimal theoretical sampling model and sequential sampling model were established, namely N =273.954 1/m- 59.698 5, To （N）=0.368 4N±1.926 8√N, respectively, it meant that when surveying N plants, if the accumulative incidence rate exceeded upper bound, the field can be set as control object; if the accumulative incidence rate didn＇t reach lower bound, it can be set as uncontrol field; if the accumulative incidence rate was between upper bound and lower bound, it should be surveyed continuously until the maximum sample size （mo=0.368 4） appeared, that was, the disease incidence was 15%, so the sampling number should be 684 plants. [Conclusion] The research results had very important instructive meaning for disease control.
