[Objective] The paper was to explore weed control measures in tobacco fields in Anshun City. [Method] Different treatments on weed control were conducted in tobacco fields in Anshun City, Guizhou Province, from 2017 t...[Objective] The paper was to explore weed control measures in tobacco fields in Anshun City. [Method] Different treatments on weed control were conducted in tobacco fields in Anshun City, Guizhou Province, from 2017 to 2019. [Result] Various treatments had no negative effect on tobacco plant growth in the field, and had different degrees of control effects on five dominant weeds, including Digitaria sanguinalis, Setaria viridis, Fagopyrum dibotrys, Commelina communis and Chenopodium album. White mulching film and 50% butralin·clomazone EC 160 m L/667 m^(2) + white mulching film had the worst performance, which had extremely significant or significant differences with other treatments. There was no sig-nificant difference among most treatments, and the overall effects were comprehensive(multi-factor) treatment > double factor treatment > single factor treatment. [Conclusion] Combination control is recommended in practical tobacco production.展开更多
Herbicide-based weeds control impacts wheat crops as well.SynComs of Pseudomonas strains reduce the need for high-dose herbicides.100%Axial provides less weed control compared to 75%Axial with C4 SynCom.Axial 75%with ...Herbicide-based weeds control impacts wheat crops as well.SynComs of Pseudomonas strains reduce the need for high-dose herbicides.100%Axial provides less weed control compared to 75%Axial with C4 SynCom.Axial 75%with C4 SynCom promotes wheat growth than the 75%Axial alone.展开更多
[ Objective] The purpose was to supply experimental base for preparing new types of high efficient and safe mixture herbicide for sugarcane field. [ Method ] The associated function of MCPA-isooctyl and ametryn on Dig...[ Objective] The purpose was to supply experimental base for preparing new types of high efficient and safe mixture herbicide for sugarcane field. [ Method ] The associated function of MCPA-isooctyl and ametryn on Digitaria sanguinalis and Celosia argentea was evaluated by co-tox. icity coefficient method by potting experiment. [ Result] When active ingredient of MCPA-isooctyl and ametryn was mixed in the proportion of 9： 5, there was obvious synergistic effect on D. sanguinalis and C. argentea, while the co-toxicity coefficients reached 156.24 and 140.40. Proportion method and bisection method were used to confirm the optimum proportion of various ingredients in mixture of MCPA-isooctyl and ametryn, and the optimum proportion was as follows： 35.4% MCPA-isooctyl, 19.6% ametryn, 10.0% emulsifier and the rest were solvents. The stability test indicated that each index of this EC was consistent with standard for pesticide EC. Field efficacy test of 55% MCPA-isooctyl and ametryn EC showed that most weeds in sugarcane field could be effectively controlled with the dose range of 1 073 -2 310 g （a. i. ）/hm^2. [ Conclusion ] Mixture product of ametryn and MCPA-isooctyl with high content was successfully developed, which had the advantages including high efficiency, broad spectrum, good economy and convenient utilization, etc.展开更多
2020和2021年在江西省南昌市进行了9.5%丙嗪嘧磺隆SC在15~60 g a.i./hm^(2)处理下及对照药(苄嘧磺隆和五氟磺草胺)的大田杂草防效试验,并评估其对水稻安全性和产量的影响。结果表明,9.5%丙嗪嘧磺隆SC对移栽水稻田稗草和鸭舌草均具有良...2020和2021年在江西省南昌市进行了9.5%丙嗪嘧磺隆SC在15~60 g a.i./hm^(2)处理下及对照药(苄嘧磺隆和五氟磺草胺)的大田杂草防效试验,并评估其对水稻安全性和产量的影响。结果表明,9.5%丙嗪嘧磺隆SC对移栽水稻田稗草和鸭舌草均具有良好的防除效果,60 g a.i./hm^(2)剂量处理后,对稗草的株防效高达92.40%~98.91%,对鸭舌草的株防效为82.62%~89.15%。所有处理对水稻均无药害产生,并实现增产。因此,新型除草剂丙嗪嘧磺隆可有效防除移栽水稻田稗草和鸭舌草,有较好的应用价值。展开更多
为探究封闭式除草剂苗后喷施对小麦生长和杂草的影响,以周麦22为试验材料,设置砜吡草唑用量125(T1)、250(T2)、500(T3)、1000(T4)、2000(T5)g a.i./hm^(2)和氟噻草胺用量184.5(T6)、369(T7)、738(T8)、1476(T9)g a.i./hm^(2)9个喷药处理...为探究封闭式除草剂苗后喷施对小麦生长和杂草的影响,以周麦22为试验材料,设置砜吡草唑用量125(T1)、250(T2)、500(T3)、1000(T4)、2000(T5)g a.i./hm^(2)和氟噻草胺用量184.5(T6)、369(T7)、738(T8)、1476(T9)g a.i./hm^(2)9个喷药处理和1个空白(清水)对照,研究不同除草剂对小麦光合特性、叶绿素SPAD值、光合有效辐射(IPAR)、叶面积指数(LAI)、鲜质量的影响及对杂草的化除效果。结果表明:T1、T6处理下小麦叶片的净光合速率高于对照,9个处理蒸腾速率均低于对照,T6、T1处理数值较大,气孔导度T1处理最大;胞间CO_(2)浓度T9处理最大,T1处理最小。在除草剂施用21 d时,T1处理SPAD值与对照差异有统计学意义。T1、T2、T3、T6、T7处理下,小麦IPAR和LAI均高于对照,且以T1处理下值最大,较对照分别增加18.37%、37.77%,T2次之。砜吡草唑施药剂量在125、250 g a.i./hm^(2)时(T1和T2)对小麦株高和鲜质量没有显著性影响;当剂量>250 g a.i./hm^(2)时,则会出现抑制症状,氟噻草胺不同用量小麦株高和鲜质量均受抑制。可见,T1和T2处理对小麦生长发育影响较小。T4、T5和T93个处理对所试杂草鲜质量防效均高于95%,T1和T62个处理对野燕麦的防效不明显。考虑到对小麦生长安全和用药成本,在对节节麦和野燕麦鲜质量防效达到50%~95%且对其余供试杂草鲜质量防效均高于95%的6个处理(T2、T3、T4、T5、T8、T9)中,推荐T2处理用于麦田苗后喷施。展开更多
文摘[Objective] The paper was to explore weed control measures in tobacco fields in Anshun City. [Method] Different treatments on weed control were conducted in tobacco fields in Anshun City, Guizhou Province, from 2017 to 2019. [Result] Various treatments had no negative effect on tobacco plant growth in the field, and had different degrees of control effects on five dominant weeds, including Digitaria sanguinalis, Setaria viridis, Fagopyrum dibotrys, Commelina communis and Chenopodium album. White mulching film and 50% butralin·clomazone EC 160 m L/667 m^(2) + white mulching film had the worst performance, which had extremely significant or significant differences with other treatments. There was no sig-nificant difference among most treatments, and the overall effects were comprehensive(multi-factor) treatment > double factor treatment > single factor treatment. [Conclusion] Combination control is recommended in practical tobacco production.
基金supported by Higher Education Commission,Pakistan in a project(TDF-11)under Technology Development Fund Program,the National Natural Science Foundation of China(32100090)Fundamental Research Funds for the Central Universities of China(2662022ZHQD001)Great gratitude goes to linguistics Prof.Ping Liu from Huazhong Agriculture University,Wuhan,China for her work at English editing and language polishing.
文摘Herbicide-based weeds control impacts wheat crops as well.SynComs of Pseudomonas strains reduce the need for high-dose herbicides.100%Axial provides less weed control compared to 75%Axial with C4 SynCom.Axial 75%with C4 SynCom promotes wheat growth than the 75%Axial alone.
基金Supported by Guangxi Youth Fund Project(Guikeqing0832062)~~
文摘[ Objective] The purpose was to supply experimental base for preparing new types of high efficient and safe mixture herbicide for sugarcane field. [ Method ] The associated function of MCPA-isooctyl and ametryn on Digitaria sanguinalis and Celosia argentea was evaluated by co-tox. icity coefficient method by potting experiment. [ Result] When active ingredient of MCPA-isooctyl and ametryn was mixed in the proportion of 9： 5, there was obvious synergistic effect on D. sanguinalis and C. argentea, while the co-toxicity coefficients reached 156.24 and 140.40. Proportion method and bisection method were used to confirm the optimum proportion of various ingredients in mixture of MCPA-isooctyl and ametryn, and the optimum proportion was as follows： 35.4% MCPA-isooctyl, 19.6% ametryn, 10.0% emulsifier and the rest were solvents. The stability test indicated that each index of this EC was consistent with standard for pesticide EC. Field efficacy test of 55% MCPA-isooctyl and ametryn EC showed that most weeds in sugarcane field could be effectively controlled with the dose range of 1 073 -2 310 g （a. i. ）/hm^2. [ Conclusion ] Mixture product of ametryn and MCPA-isooctyl with high content was successfully developed, which had the advantages including high efficiency, broad spectrum, good economy and convenient utilization, etc.
文摘2020和2021年在江西省南昌市进行了9.5%丙嗪嘧磺隆SC在15~60 g a.i./hm^(2)处理下及对照药(苄嘧磺隆和五氟磺草胺)的大田杂草防效试验,并评估其对水稻安全性和产量的影响。结果表明,9.5%丙嗪嘧磺隆SC对移栽水稻田稗草和鸭舌草均具有良好的防除效果,60 g a.i./hm^(2)剂量处理后,对稗草的株防效高达92.40%~98.91%,对鸭舌草的株防效为82.62%~89.15%。所有处理对水稻均无药害产生,并实现增产。因此,新型除草剂丙嗪嘧磺隆可有效防除移栽水稻田稗草和鸭舌草,有较好的应用价值。
文摘为探究封闭式除草剂苗后喷施对小麦生长和杂草的影响,以周麦22为试验材料,设置砜吡草唑用量125(T1)、250(T2)、500(T3)、1000(T4)、2000(T5)g a.i./hm^(2)和氟噻草胺用量184.5(T6)、369(T7)、738(T8)、1476(T9)g a.i./hm^(2)9个喷药处理和1个空白(清水)对照,研究不同除草剂对小麦光合特性、叶绿素SPAD值、光合有效辐射(IPAR)、叶面积指数(LAI)、鲜质量的影响及对杂草的化除效果。结果表明:T1、T6处理下小麦叶片的净光合速率高于对照,9个处理蒸腾速率均低于对照,T6、T1处理数值较大,气孔导度T1处理最大;胞间CO_(2)浓度T9处理最大,T1处理最小。在除草剂施用21 d时,T1处理SPAD值与对照差异有统计学意义。T1、T2、T3、T6、T7处理下,小麦IPAR和LAI均高于对照,且以T1处理下值最大,较对照分别增加18.37%、37.77%,T2次之。砜吡草唑施药剂量在125、250 g a.i./hm^(2)时(T1和T2)对小麦株高和鲜质量没有显著性影响;当剂量>250 g a.i./hm^(2)时,则会出现抑制症状,氟噻草胺不同用量小麦株高和鲜质量均受抑制。可见,T1和T2处理对小麦生长发育影响较小。T4、T5和T93个处理对所试杂草鲜质量防效均高于95%,T1和T62个处理对野燕麦的防效不明显。考虑到对小麦生长安全和用药成本,在对节节麦和野燕麦鲜质量防效达到50%~95%且对其余供试杂草鲜质量防效均高于95%的6个处理(T2、T3、T4、T5、T8、T9)中,推荐T2处理用于麦田苗后喷施。
