The pathogen and characteristics, infection cycle, occurrence regularity and damage symptoms of sweet potato stem nematode disease were introduced in the paper. Moreover, the comprehensive prevention measures were put...The pathogen and characteristics, infection cycle, occurrence regularity and damage symptoms of sweet potato stem nematode disease were introduced in the paper. Moreover, the comprehensive prevention measures were put forward, including plant quarantine, agricultural control and chemical control. The study provided certain basis for reducing damages of sweet potato stem nematode disease and improving yield and quality of sweet potato.展开更多
[ Objective] The paper was to explore the field evaluation system for resistance of sweet potato stem nematode. [ Method ] The resistance of 52.5 acces- sions was evaluated using naturally induced identification metho...[ Objective] The paper was to explore the field evaluation system for resistance of sweet potato stem nematode. [ Method ] The resistance of 52.5 acces- sions was evaluated using naturally induced identification method in diseased field from 2004 to 2009, and the accessions with resistance were selected. [ Result ] The field evaluation system for resistance of sweet p6tato stem nematode was affected by many factors. Non-uniform incidence in fields led to unstable identification results of certain materials. For test problems, some parameters of the existing evaluation system were corrected to reduce the experimental error. E Conclusion The study provided the reference for further improvement of field evaluation system for resistance of sweet potato stem nematode.展开更多
In order to extract solanesol from potato stems and leaves more effectively and improve the extraction rate of solanesol, the same batch of potato stems and leaves harvested from Guyuan, Ningxia was selected as a rese...In order to extract solanesol from potato stems and leaves more effectively and improve the extraction rate of solanesol, the same batch of potato stems and leaves harvested from Guyuan, Ningxia was selected as a research object, cell wall of potato stems and leaves was broken by enzymolysis with cellulase and high- speed shearing, and then reflux-extracted with 95% ethanol. Solanesol content was determined by HPLC, and extract yield was calculated. Extract yield and solanesol extraction rate was used as an index for comparison of difference between the 2 wall-breaking methods, so as to select the optimal wall-breaking method. The results showed that enzymolysis with cellulase exhibited extraction rate and extract yield of solanesol of 91.38% and 8.02%, respectively, which were better than those under high-speed shear emulsification technique. The enzymolysis wall-breaking method has the advantages of simple operation and strong feasibility.展开更多
[Objective]The paper was to effectively control stem base rot of sweet potato.[Method]Chemical prevention and control test against stem base rot of sweet potato were conducted for consecutive three years from 2016 to ...[Objective]The paper was to effectively control stem base rot of sweet potato.[Method]Chemical prevention and control test against stem base rot of sweet potato were conducted for consecutive three years from 2016 to 2018.[Result]The use of carbendazim or carbendazim+mancozeb,and carbendazim+embamycin had significant control effect on stem base rot of sweet potato.However,the applied concentration should be higher than the recommended concentration.Especially the concentration of 50%carbendazim WP should be no more than 300 times,and the prevention and control effect of 100 times dilution would be better.[Conclusion]The types and concentrations of prevention and control agents are determined in the test,which will provide certain basis for chemical prevention and control against stem base rot of sweet potato.展开更多
基金Supported by Jiangsu Agricultural Science and Technology Independent Innovation Fund(CX(12)2030)Special Fund Project for Establishment of Modern Agricultural Industry System (CARS-11-C-03)
文摘The pathogen and characteristics, infection cycle, occurrence regularity and damage symptoms of sweet potato stem nematode disease were introduced in the paper. Moreover, the comprehensive prevention measures were put forward, including plant quarantine, agricultural control and chemical control. The study provided certain basis for reducing damages of sweet potato stem nematode disease and improving yield and quality of sweet potato.
基金Supported by Agricultural Science and Technology Innovation Funds of Jiangsu Province[CX(12)2030]
文摘[ Objective] The paper was to explore the field evaluation system for resistance of sweet potato stem nematode. [ Method ] The resistance of 52.5 acces- sions was evaluated using naturally induced identification method in diseased field from 2004 to 2009, and the accessions with resistance were selected. [ Result ] The field evaluation system for resistance of sweet p6tato stem nematode was affected by many factors. Non-uniform incidence in fields led to unstable identification results of certain materials. For test problems, some parameters of the existing evaluation system were corrected to reduce the experimental error. E Conclusion The study provided the reference for further improvement of field evaluation system for resistance of sweet potato stem nematode.
基金Supported by Ningxia Agricultural Comprehensive Development Demonstration Project of Integration of Potato Green High-yielding and Mechanized Operation Techniques in 2015(NTKJ2016-09-03)
文摘In order to extract solanesol from potato stems and leaves more effectively and improve the extraction rate of solanesol, the same batch of potato stems and leaves harvested from Guyuan, Ningxia was selected as a research object, cell wall of potato stems and leaves was broken by enzymolysis with cellulase and high- speed shearing, and then reflux-extracted with 95% ethanol. Solanesol content was determined by HPLC, and extract yield was calculated. Extract yield and solanesol extraction rate was used as an index for comparison of difference between the 2 wall-breaking methods, so as to select the optimal wall-breaking method. The results showed that enzymolysis with cellulase exhibited extraction rate and extract yield of solanesol of 91.38% and 8.02%, respectively, which were better than those under high-speed shear emulsification technique. The enzymolysis wall-breaking method has the advantages of simple operation and strong feasibility.
基金Major Science and Technology Project for New Variety Breeding of Agriculture(Grain)in Zhejiang Province"Sweet Potato,Yam Germplasm Screening and New Variety Breeding"(2016C 02050-7-3)Key Agricultural Science and Technology Project of Taizhou City"Study on Pathogen Identification,Occurrence Regularity and Prevention and Control Technology of Sweet Potato Stem Base Rot(1701ny12)+2 种基金China Agricultural(Sweet Potato)Industry Research System“Fresh Sweet Potato Improvement"(CARS-10-C-17)Project of Guangzhou Comprehensive Test Station(CARS-10-B-4)2017 Special Project on Agricultural Development and Rural Work in Guangdong Province"Creation and Application of New Sweet Potato Varieties for High Quality and Resistance".
文摘[Objective]The paper was to effectively control stem base rot of sweet potato.[Method]Chemical prevention and control test against stem base rot of sweet potato were conducted for consecutive three years from 2016 to 2018.[Result]The use of carbendazim or carbendazim+mancozeb,and carbendazim+embamycin had significant control effect on stem base rot of sweet potato.However,the applied concentration should be higher than the recommended concentration.Especially the concentration of 50%carbendazim WP should be no more than 300 times,and the prevention and control effect of 100 times dilution would be better.[Conclusion]The types and concentrations of prevention and control agents are determined in the test,which will provide certain basis for chemical prevention and control against stem base rot of sweet potato.
