Rice stripe virus disease （RSVD） and rice black-streaked dwarf virus disease （RBSDVD） are two epidemic diseases in Yancheng City, Jiangsu Province in the last decade. The authors investigated the disaster regulari...Rice stripe virus disease （RSVD） and rice black-streaked dwarf virus disease （RBSDVD） are two epidemic diseases in Yancheng City, Jiangsu Province in the last decade. The authors investigated the disaster regularity, prevention and control technology of RSVD and RBSDVD systematically. The occurrence and virus transmission of SBPH and disaster regularity of virus diseases were studied; the resistance of some rice varieties was cleared; the effects of physical and agricultural measures such as insect net blocking, appropriate late sowing and plowing on controlling occurrence and virus transmission of SBPH were figured out; a hatch of chemical agents were screened, providing efficient and harmless pesticides for effective control against SBPH and prevention against virus diseases. A set of disaster control and mitigation technologies was proposed in this paper, which was practical, sustainable, and easy to operate for the local planting patterns.展开更多
To analyze the correlation of rice resistance against black-streaked dwarf virus disease（ RBSDV） and small brown planthopper（ SBPH; Laodelphax striatellus Fallen）,49 rice varieties were conduced field inoculation ...To analyze the correlation of rice resistance against black-streaked dwarf virus disease（ RBSDV） and small brown planthopper（ SBPH; Laodelphax striatellus Fallen）,49 rice varieties were conduced field inoculation identification,artificial inoculation identification,antibiosis test and antixenosis test,respectively. There were more varieties with the incidence rate less than 20% in field inoculation. Field inoculation identification was greatly affected by external environment factors,and the incidence rates were significantly lower than that in artificial inoculation identification. In field inoculation and artificial inoculation identification,the incidence rates of indica rice varieties were lower than that of japonica rice varieties. Antibiosis test showed that all japonica rice varieties were susceptible to insect pests,and there were only five indica rice varieties with antibiosis value less than 81%. The antixenosis value of indica rice varieties was significantly lower than that of japonica rice varieties,and the resistance of indica rice varieties against SBPH was higher than that of japonica rice varieties. Correlation analysis of rice resistance against RBSDV and SBPH showed that the incidence rates of varieties in field identification had extremely positive correlation with its antixenosis to SBPH,but was irrelevant to antibiosis of varieties to SBPH. The incidence rates of varieties in artificial inoculation identification had significantly positive correlation with antixenosis and antibiosis of varieties to SBPH. Moreover,antixenosis of varieties had extremely positive correlation with incidence rates in both artificial inoculation identification and field inoculation identification. Therefore,insect-resistant varieties influenced virus transmitting effect of SBPH to a certain extent,and it could reduce the damage of RBSDV by cultivating resistant varieties against SBPH.展开更多
Dimeric complex 〔Cu(SbPh 3) 2I〕 2 has been synthesized by a solid state reaction at a low heating temperature and its crystal structure has been analyzed by X ray crystallography. The crystal is monoclinic, space gr...Dimeric complex 〔Cu(SbPh 3) 2I〕 2 has been synthesized by a solid state reaction at a low heating temperature and its crystal structure has been analyzed by X ray crystallography. The crystal is monoclinic, space group P2 1/a (#14), a = 20 436(5), b=14.125(3), c=24.683(3) , β=110.67(1)°, Z=4, V =6666(2) 3; C 72 H 60 Sb 4I 2Cu 2, M r = 1792, D c = 1.787 g·cm -3 , μ (Mo Kα ) = 31.88 cm -1 , F(000)=3440, R= 0.038 and R w= 0.043 for 5632 observed reflections ( I≥3.0σ(I) ) and 361 refined parameters. The result reveals the copper and the bridging iodide atoms form an approximately planar rhomboid array. Effects of the bulkiness of the ligands upon the structures of the analogous complexes are discussed.\;展开更多
基金Supported by Agricultural "Three-item" Project of Jiangsu Province "Promotion of Comprehensive Prevention and Control Technology of Major Pests and Diseases such as Rice Stripe Virus Disease" [SX(2005)029] & Agricultural "Three-item" Project of Jiangsu Province "Prevention and Control Technology of Rice Black-streaked Dwarf Virus Disease"[SX(2008)018] & Agricultural "Three-item" Project of Jiangsu Province "Integration and Popularization of Prevention and Control Technology of Rice Black-streaked Dwarf Virus Disease"[SX(2009)49]
文摘Rice stripe virus disease （RSVD） and rice black-streaked dwarf virus disease （RBSDVD） are two epidemic diseases in Yancheng City, Jiangsu Province in the last decade. The authors investigated the disaster regularity, prevention and control technology of RSVD and RBSDVD systematically. The occurrence and virus transmission of SBPH and disaster regularity of virus diseases were studied; the resistance of some rice varieties was cleared; the effects of physical and agricultural measures such as insect net blocking, appropriate late sowing and plowing on controlling occurrence and virus transmission of SBPH were figured out; a hatch of chemical agents were screened, providing efficient and harmless pesticides for effective control against SBPH and prevention against virus diseases. A set of disaster control and mitigation technologies was proposed in this paper, which was practical, sustainable, and easy to operate for the local planting patterns.
基金Supported by Science and Technology Support Project of Jiangsu Province(BE2013301)Agricultural Science and Technology Independent Innovation Fund of Jiangsu Province[CX[12]5112]National Rice Industry System[CARS-01-01A]
文摘To analyze the correlation of rice resistance against black-streaked dwarf virus disease（ RBSDV） and small brown planthopper（ SBPH; Laodelphax striatellus Fallen）,49 rice varieties were conduced field inoculation identification,artificial inoculation identification,antibiosis test and antixenosis test,respectively. There were more varieties with the incidence rate less than 20% in field inoculation. Field inoculation identification was greatly affected by external environment factors,and the incidence rates were significantly lower than that in artificial inoculation identification. In field inoculation and artificial inoculation identification,the incidence rates of indica rice varieties were lower than that of japonica rice varieties. Antibiosis test showed that all japonica rice varieties were susceptible to insect pests,and there were only five indica rice varieties with antibiosis value less than 81%. The antixenosis value of indica rice varieties was significantly lower than that of japonica rice varieties,and the resistance of indica rice varieties against SBPH was higher than that of japonica rice varieties. Correlation analysis of rice resistance against RBSDV and SBPH showed that the incidence rates of varieties in field identification had extremely positive correlation with its antixenosis to SBPH,but was irrelevant to antibiosis of varieties to SBPH. The incidence rates of varieties in artificial inoculation identification had significantly positive correlation with antixenosis and antibiosis of varieties to SBPH. Moreover,antixenosis of varieties had extremely positive correlation with incidence rates in both artificial inoculation identification and field inoculation identification. Therefore,insect-resistant varieties influenced virus transmitting effect of SBPH to a certain extent,and it could reduce the damage of RBSDV by cultivating resistant varieties against SBPH.
文摘Dimeric complex 〔Cu(SbPh 3) 2I〕 2 has been synthesized by a solid state reaction at a low heating temperature and its crystal structure has been analyzed by X ray crystallography. The crystal is monoclinic, space group P2 1/a (#14), a = 20 436(5), b=14.125(3), c=24.683(3) , β=110.67(1)°, Z=4, V =6666(2) 3; C 72 H 60 Sb 4I 2Cu 2, M r = 1792, D c = 1.787 g·cm -3 , μ (Mo Kα ) = 31.88 cm -1 , F(000)=3440, R= 0.038 and R w= 0.043 for 5632 observed reflections ( I≥3.0σ(I) ) and 361 refined parameters. The result reveals the copper and the bridging iodide atoms form an approximately planar rhomboid array. Effects of the bulkiness of the ligands upon the structures of the analogous complexes are discussed.\;
