为探讨微生物杀菌剂贝莱斯芽孢杆菌对黄瓜白粉病的防治作用。试验采用5个黄瓜品种:‘中农26’、‘金胚98’、‘长春密刺’、‘津玉168’、‘雪白黄瓜’。采用盆栽法测定贝莱斯芽孢杆菌对‘中农26’黄瓜白粉病菌的室内毒力,通过田间药效...为探讨微生物杀菌剂贝莱斯芽孢杆菌对黄瓜白粉病的防治作用。试验采用5个黄瓜品种:‘中农26’、‘金胚98’、‘长春密刺’、‘津玉168’、‘雪白黄瓜’。采用盆栽法测定贝莱斯芽孢杆菌对‘中农26’黄瓜白粉病菌的室内毒力,通过田间药效试验在山东、四川分别测定贝莱斯芽孢杆菌对‘津玉168’、‘雪白黄瓜’黄瓜白粉病的防治效果,并采用盆栽法测定贝莱斯芽孢杆菌对‘中农26’、‘金胚98’、‘长春密刺’黄瓜植株的安全性。贝莱斯芽孢杆菌对‘中农26’黄瓜白粉病菌的EC50值为0.267亿孢子/mL,室内活性较强;山东、四川两地贝莱斯芽孢杆菌防治‘津玉168’、‘雪白黄瓜’黄瓜白粉病2次药后14 d防效为62.08%~75.58%,与对照药剂相比防效更好;200亿孢子/g贝莱斯芽孢杆菌可溶粒剂3000、6000、12000 g a.i./hm^(2)对‘中农26’、‘金胚98’、‘长春密刺’黄瓜生长抑制率均无显著性差异,安全。贝莱斯芽孢杆菌对黄瓜白粉病有较好的室内活性与田间防治效果,对黄瓜植株相对安全,可以推广使用。展开更多
Magnetic semiconductors integrate the dual characteristics of magnets and semiconductors.It is difficult to manufacture magnetic semiconductors that function at room temperature.Here,we review a series of our recent t...Magnetic semiconductors integrate the dual characteristics of magnets and semiconductors.It is difficult to manufacture magnetic semiconductors that function at room temperature.Here,we review a series of our recent theoretical predictions on room-temperature ferromagnetic semiconductors.Since the creation of two-dimensional(2D)magnetic semiconductors in 2017,there have been numerous developments in both experimental and theoretical investigations.By density functional theory calculations and model analysis,we recently predicted several2D room-temperature magnetic semiconductors,including CrGeSe_(3)with strain,CrGeTe_(3)/PtSe_(2) heterostructure,and technetium-based semiconductors(TcSiTe_(3),TcGeSe_(3),and TcGeTe_(3)),as well as PdBr_(3)and PtBr_(3)with a potential room-temperature quantum anomalous Hall effect.Our findings demonstrated that the Curie temperature of these 2D ferromagnetic semiconductors can be dramatically enhanced by some external fields,such as strain,construction of heterostructure,and electric field.In addition,we proposed appropriate doping conditions for diluted magnetic semiconductors,and predicted the Cr doped GaSb and InSb as possible room-temperature magnetic semiconductors.展开更多
文摘为探讨微生物杀菌剂贝莱斯芽孢杆菌对黄瓜白粉病的防治作用。试验采用5个黄瓜品种:‘中农26’、‘金胚98’、‘长春密刺’、‘津玉168’、‘雪白黄瓜’。采用盆栽法测定贝莱斯芽孢杆菌对‘中农26’黄瓜白粉病菌的室内毒力,通过田间药效试验在山东、四川分别测定贝莱斯芽孢杆菌对‘津玉168’、‘雪白黄瓜’黄瓜白粉病的防治效果,并采用盆栽法测定贝莱斯芽孢杆菌对‘中农26’、‘金胚98’、‘长春密刺’黄瓜植株的安全性。贝莱斯芽孢杆菌对‘中农26’黄瓜白粉病菌的EC50值为0.267亿孢子/mL,室内活性较强;山东、四川两地贝莱斯芽孢杆菌防治‘津玉168’、‘雪白黄瓜’黄瓜白粉病2次药后14 d防效为62.08%~75.58%,与对照药剂相比防效更好;200亿孢子/g贝莱斯芽孢杆菌可溶粒剂3000、6000、12000 g a.i./hm^(2)对‘中农26’、‘金胚98’、‘长春密刺’黄瓜生长抑制率均无显著性差异,安全。贝莱斯芽孢杆菌对黄瓜白粉病有较好的室内活性与田间防治效果,对黄瓜植株相对安全,可以推广使用。
基金the National Natural Science Foundation of China(Grant Nos.12074378 and 11834014)the Beijing Natural Science Foundation(Grant No.Z190011)+3 种基金the National Key R&D Program of China(Grant No.2018YFA0305800)the Beijing Municipal Science and Technology Commission(Grant No.Z191100007219013)the Chinese Academy of Sciences(Grant Nos.YSBR-030 and Y929013EA2)the Strategic Priority Research Program of Chinese Academy of Sciences(Grant Nos.XDB28000000 and XDB33000000)。
文摘Magnetic semiconductors integrate the dual characteristics of magnets and semiconductors.It is difficult to manufacture magnetic semiconductors that function at room temperature.Here,we review a series of our recent theoretical predictions on room-temperature ferromagnetic semiconductors.Since the creation of two-dimensional(2D)magnetic semiconductors in 2017,there have been numerous developments in both experimental and theoretical investigations.By density functional theory calculations and model analysis,we recently predicted several2D room-temperature magnetic semiconductors,including CrGeSe_(3)with strain,CrGeTe_(3)/PtSe_(2) heterostructure,and technetium-based semiconductors(TcSiTe_(3),TcGeSe_(3),and TcGeTe_(3)),as well as PdBr_(3)and PtBr_(3)with a potential room-temperature quantum anomalous Hall effect.Our findings demonstrated that the Curie temperature of these 2D ferromagnetic semiconductors can be dramatically enhanced by some external fields,such as strain,construction of heterostructure,and electric field.In addition,we proposed appropriate doping conditions for diluted magnetic semiconductors,and predicted the Cr doped GaSb and InSb as possible room-temperature magnetic semiconductors.
