[Objectives]This study was conducted to investigate the synergized preservation effect of different concentrations of prochloraz and chitosan on citrus Gonggan,so as to prolong the sales period of Gonggan.[Methods]&qu...[Objectives]This study was conducted to investigate the synergized preservation effect of different concentrations of prochloraz and chitosan on citrus Gonggan,so as to prolong the sales period of Gonggan.[Methods]"Zhongshan Gonggan" was used as a material.The Gonggan fruit was soaked with prochloraz (250,300 and 350 mg/L) and then coated with different concentrations of chitosan (1.0% and 1.5%),respectively.The good fruit rate,weight loss rate and titratable acid (TA),reducing sugar,total soluble solids (TSS) and Vc contents were used as evaluation indexes to investigate the preservation effect of Gonggan during cold storage.[Results]The treatment of prochloraz plus chitosan can significantly prolong the shelf life of Gonggan as it can inhibit the decline of good fruit rate,reduce the weight loss rate,and slow down the degradation and loss of titratable acid,reducing sugar,soluble solids and Vc.The 350 mg/L prochloraz+1.0% chitosan treatment was superior to other treatments.[Conclusions]This study provides a theoretical basis for better prolonging the storage period of Gonggan.展开更多
[Objective]The paper was to evaluate the safety of 45%prochloraz EW in ginger,and to study the residue and degradation of 45%prochloraz EW in ginger.[Method]45%Prochloraz EW was sprayed once at the dose of 455.625 g a...[Objective]The paper was to evaluate the safety of 45%prochloraz EW in ginger,and to study the residue and degradation of 45%prochloraz EW in ginger.[Method]45%Prochloraz EW was sprayed once at the dose of 455.625 g a.i./ha in dynamic degradation test,and ginger plants were collected at 2 h,1,3,5,7,14,21,28,35 and 42 d post spraying,respectively.45%Prochloraz EW was sprayed at the doses of 303.75 and 455.625 g a.i./ha for 2-3 times with an interval of 7 d in final residue test,and ginger plants were collected at 7,14 and 21 d post spraying,respectively.The content of prochloraz was quantitatively analyzed by gas chromatography.[Result]Dynamic degradation test demonstrated that prochloraz degraded quickly in plants,and the half-life in Shandong and Anhui were 5.8 and 7.9 d,respectively.The final residue of prochloraz in ginger samples was<0.01-0.145 mg/kg,lower than the maximum residue limit of prochloraz in ginger formulated by European Union(0.2 mg/kg).[Conclusion]Prochloraz should be sprayed at the recommended dose of 202.5-303.75 g a.i./ha for prevention and control of anthracnose on ginger.The agent should be sprayed twice in the early stage of incidence,with an interval of 7 d,and the safety interval of 14 d was safe.展开更多
Wheat scab caused by Fusarium graminearum is increasingly severe in the middle and lower reaches of the Yangtze River region. With long-term use of single chemical pesticide,the drug resistance of F. graminearum is gr...Wheat scab caused by Fusarium graminearum is increasingly severe in the middle and lower reaches of the Yangtze River region. With long-term use of single chemical pesticide,the drug resistance of F. graminearum is growing day by day. In order to reveal the inhibition effect and synergistic effect of prochloraz and tebuconazole and their mixture on F. graminearum,new compound agents for controlling wheat scab were developed. The inhibition effect and synergistic effect of prochloraz and tebuconazole mixed at seven different ratios on F. graminearum were studied. The results showed that the efficiency of the mixture was the best when the proportion of prochloraz and tebuconazole was 1:7; the EC50 was 0.145 36 and the synergistic coefficient was 1.853 9. The results provide a theoretical basis for development of new compound agents and effective control of wheat scab.展开更多
‘Gonggan’( Citrus reticulata) is a famous,high-quality and special citrus cultivar in the Xijiang River valley,Guangdong Province. However,it easily suffers from postharvest diseases,and thus is not tolerant to stor...‘Gonggan’( Citrus reticulata) is a famous,high-quality and special citrus cultivar in the Xijiang River valley,Guangdong Province. However,it easily suffers from postharvest diseases,and thus is not tolerant to storage. Based on the preliminary test results,prochloraz-manganese chloride complex was selected as the disinfectant,and prepared into different concentrations for carrying out preservation test by dipping fruits. The fruit weight loss,soluble solids content and decay rate were analyzed,and the application security and sensory evaluation for fruit freshness and flavor were observed. The results showed that dipping fruits with prochloraz-manganese chloride complex solution had significant preservation effect on‘Gonggan’fruits in postharvest storage; the suitable concentration was 2. 0-3. 0 g/L,and the decay rates of fruits stored at room temperature for 30,60 and 90 d were below 5%,10% and 15%,respectively. Plate inoculation test further revealed that the pathogen of‘Gonggan’was sensitive to prochloraz-manganese chloride complex,and the concentration of 1. 0 g/L was enough to produce significant antimicrobial effect. Other technical links related to postharvest preservation of‘Gonggan’with prochloraz-manganese chloride complex were discussed.展开更多
[Objective]The paper was to understand the resistance of Fusarium graminearum to carbendazim and prochloraz in the main wheat producing areas in Hubei Province.[Method] Totally 350 F. graminearum strains isolated in 2...[Objective]The paper was to understand the resistance of Fusarium graminearum to carbendazim and prochloraz in the main wheat producing areas in Hubei Province.[Method] Totally 350 F. graminearum strains isolated in 2014 were determined to clear their sensitivity to carbendazim and prochloraz. [Result]All isolates were sensitive to carbendazim and prochloraz in Hubei Province,and carbendazim was still valuable in controlling Fusarium head blight. The control effect of prochloraz was better than that of carbendazim,and the combination of prochloraz and carbendazim at the proportion of 1∶ 7 received the best control effect.[Conclusion]Combination of chemical agents will occupy a more and more important position in future prevention and control against Fusarium head blight.展开更多
[Objective]The paper was to solve the weakness of heavy postharvest diseases and non-endurable storage of‘Shatangju',to improve the preservation effect of‘Shatangju'. [Method] Fruits were dipped in different...[Objective]The paper was to solve the weakness of heavy postharvest diseases and non-endurable storage of‘Shatangju',to improve the preservation effect of‘Shatangju'. [Method] Fruits were dipped in different concentrations of prochloraz-manganese chloride complex solutions. The postharvest weight loss rate,soluble solids content and decay rate of fruits were determined,and the safety of chemical agents was observed and evaluated. [Result]Prochloraz-manganese chloride complex had significant preservation effect on postharvest‘Shatangju'fruits,and the appropriate concentration was 0. 15%-0. 20%( effective content);the decay rates of fruits stored at room temperature for 15,30,45,60 and 90 d were 0,5%,< 10%,< 10% and < 30%; there was no specific changes in smell and flavor of non-decayed fruits. [Conclusion] Prochloraz-manganese chloride complex solution had significant preservation effect on ‘Shatangju'by inhibiting and reducing the growth and development of pathogenic bacteria,and the effect was much better under refrigeration condition.展开更多
Prochloraz diluents( 450 ×,475 ×,500 ×) were added with different concentrations of nano-titanium dioxide( Ti O2)( 0. 8%,1. 0%) respectively to prepare complex fresh-keeping agents,which were applied in...Prochloraz diluents( 450 ×,475 ×,500 ×) were added with different concentrations of nano-titanium dioxide( Ti O2)( 0. 8%,1. 0%) respectively to prepare complex fresh-keeping agents,which were applied in the refrigeration of Dioscorea alata Lirm. sp. With rot index,weight loss rate,browning degree( BD),total soluble solids( TSS) content,malondialdehyde( MDA) content,polyphenol oxidase( PPO) activity and peroxidase( POD) activity,DPPH· scavenging rate as evaluation indexes,the preservation effect of the prepared freshkeeping agents on D. alata during the cold storage period was analyzed. The results showed that prochloraz added with nano-titanium dioxide significantly prolonged the storage life,reduced the rot rate and weight loss rate,and slowed the loss of pulp of D. alata. The preservation effect of complex fresh-keeping agent of prochloraz diluent( 475 ×) and nano-titanium dioxide( 1. 0%) was better than that of other treatments.展开更多
基金Supported by Natural Science Foundation of Guangxi(2017GXNSFAA198082)Hezhou Scientific Research and Technology Development Program of Guangxi(HKG1541005)
文摘[Objectives]This study was conducted to investigate the synergized preservation effect of different concentrations of prochloraz and chitosan on citrus Gonggan,so as to prolong the sales period of Gonggan.[Methods]"Zhongshan Gonggan" was used as a material.The Gonggan fruit was soaked with prochloraz (250,300 and 350 mg/L) and then coated with different concentrations of chitosan (1.0% and 1.5%),respectively.The good fruit rate,weight loss rate and titratable acid (TA),reducing sugar,total soluble solids (TSS) and Vc contents were used as evaluation indexes to investigate the preservation effect of Gonggan during cold storage.[Results]The treatment of prochloraz plus chitosan can significantly prolong the shelf life of Gonggan as it can inhibit the decline of good fruit rate,reduce the weight loss rate,and slow down the degradation and loss of titratable acid,reducing sugar,soluble solids and Vc.The 350 mg/L prochloraz+1.0% chitosan treatment was superior to other treatments.[Conclusions]This study provides a theoretical basis for better prolonging the storage period of Gonggan.
基金Supported by Agricultural Science and Technology Innovation Project of Shandong Academy of Agricultural Sciences(CXGC2018E19).
文摘[Objective]The paper was to evaluate the safety of 45%prochloraz EW in ginger,and to study the residue and degradation of 45%prochloraz EW in ginger.[Method]45%Prochloraz EW was sprayed once at the dose of 455.625 g a.i./ha in dynamic degradation test,and ginger plants were collected at 2 h,1,3,5,7,14,21,28,35 and 42 d post spraying,respectively.45%Prochloraz EW was sprayed at the doses of 303.75 and 455.625 g a.i./ha for 2-3 times with an interval of 7 d in final residue test,and ginger plants were collected at 7,14 and 21 d post spraying,respectively.The content of prochloraz was quantitatively analyzed by gas chromatography.[Result]Dynamic degradation test demonstrated that prochloraz degraded quickly in plants,and the half-life in Shandong and Anhui were 5.8 and 7.9 d,respectively.The final residue of prochloraz in ginger samples was<0.01-0.145 mg/kg,lower than the maximum residue limit of prochloraz in ginger formulated by European Union(0.2 mg/kg).[Conclusion]Prochloraz should be sprayed at the recommended dose of 202.5-303.75 g a.i./ha for prevention and control of anthracnose on ginger.The agent should be sprayed twice in the early stage of incidence,with an interval of 7 d,and the safety interval of 14 d was safe.
基金Supported by Natural Science Foundation of Hubei Province(2016CFB478)Youth Talent Program of Hubei Department of Education(D200712004)
文摘Wheat scab caused by Fusarium graminearum is increasingly severe in the middle and lower reaches of the Yangtze River region. With long-term use of single chemical pesticide,the drug resistance of F. graminearum is growing day by day. In order to reveal the inhibition effect and synergistic effect of prochloraz and tebuconazole and their mixture on F. graminearum,new compound agents for controlling wheat scab were developed. The inhibition effect and synergistic effect of prochloraz and tebuconazole mixed at seven different ratios on F. graminearum were studied. The results showed that the efficiency of the mixture was the best when the proportion of prochloraz and tebuconazole was 1:7; the EC50 was 0.145 36 and the synergistic coefficient was 1.853 9. The results provide a theoretical basis for development of new compound agents and effective control of wheat scab.
基金Supported by Science and Technology Project of Guangdong Province(2014A020208143)Natural Science Foundation of Guangdong Province(S2013010015195)+1 种基金Science and Technology Innovation Project of Guangdong Department of Education(2013KJCX0192)Special Fund for the Introduction of Talents in Colleges and Universities of Guangdong Province(2010)
文摘‘Gonggan’( Citrus reticulata) is a famous,high-quality and special citrus cultivar in the Xijiang River valley,Guangdong Province. However,it easily suffers from postharvest diseases,and thus is not tolerant to storage. Based on the preliminary test results,prochloraz-manganese chloride complex was selected as the disinfectant,and prepared into different concentrations for carrying out preservation test by dipping fruits. The fruit weight loss,soluble solids content and decay rate were analyzed,and the application security and sensory evaluation for fruit freshness and flavor were observed. The results showed that dipping fruits with prochloraz-manganese chloride complex solution had significant preservation effect on‘Gonggan’fruits in postharvest storage; the suitable concentration was 2. 0-3. 0 g/L,and the decay rates of fruits stored at room temperature for 30,60 and 90 d were below 5%,10% and 15%,respectively. Plate inoculation test further revealed that the pathogen of‘Gonggan’was sensitive to prochloraz-manganese chloride complex,and the concentration of 1. 0 g/L was enough to produce significant antimicrobial effect. Other technical links related to postharvest preservation of‘Gonggan’with prochloraz-manganese chloride complex were discussed.
基金Supported by Key Technologies R&D Program of Hubei(2015BBA152)Innovative Experiment Project of College Students(20150086)Natural Science Foundation of Hubei Province(2014CFB367)
文摘[Objective]The paper was to understand the resistance of Fusarium graminearum to carbendazim and prochloraz in the main wheat producing areas in Hubei Province.[Method] Totally 350 F. graminearum strains isolated in 2014 were determined to clear their sensitivity to carbendazim and prochloraz. [Result]All isolates were sensitive to carbendazim and prochloraz in Hubei Province,and carbendazim was still valuable in controlling Fusarium head blight. The control effect of prochloraz was better than that of carbendazim,and the combination of prochloraz and carbendazim at the proportion of 1∶ 7 received the best control effect.[Conclusion]Combination of chemical agents will occupy a more and more important position in future prevention and control against Fusarium head blight.
基金Supported by Science and Technology Project of Guangdong Province(2014A020208143)Natural Science Foundation of Guangdong Province(S2013010015195)+1 种基金Science and Technology Innovation Project of Guangdong Department of Education(2013KJCX0192)Special Fund for Introduced Talents in Colleges and Universities in Guangdong Province(2010)
文摘[Objective]The paper was to solve the weakness of heavy postharvest diseases and non-endurable storage of‘Shatangju',to improve the preservation effect of‘Shatangju'. [Method] Fruits were dipped in different concentrations of prochloraz-manganese chloride complex solutions. The postharvest weight loss rate,soluble solids content and decay rate of fruits were determined,and the safety of chemical agents was observed and evaluated. [Result]Prochloraz-manganese chloride complex had significant preservation effect on postharvest‘Shatangju'fruits,and the appropriate concentration was 0. 15%-0. 20%( effective content);the decay rates of fruits stored at room temperature for 15,30,45,60 and 90 d were 0,5%,< 10%,< 10% and < 30%; there was no specific changes in smell and flavor of non-decayed fruits. [Conclusion] Prochloraz-manganese chloride complex solution had significant preservation effect on ‘Shatangju'by inhibiting and reducing the growth and development of pathogenic bacteria,and the effect was much better under refrigeration condition.
基金Supported by Natural Science Foundation of Guangxi(2017GXNSFAA198082)Guangxi First-class Discipline Cultivation Project for Food Science and Engineering(GXYLXP1812)
文摘Prochloraz diluents( 450 ×,475 ×,500 ×) were added with different concentrations of nano-titanium dioxide( Ti O2)( 0. 8%,1. 0%) respectively to prepare complex fresh-keeping agents,which were applied in the refrigeration of Dioscorea alata Lirm. sp. With rot index,weight loss rate,browning degree( BD),total soluble solids( TSS) content,malondialdehyde( MDA) content,polyphenol oxidase( PPO) activity and peroxidase( POD) activity,DPPH· scavenging rate as evaluation indexes,the preservation effect of the prepared freshkeeping agents on D. alata during the cold storage period was analyzed. The results showed that prochloraz added with nano-titanium dioxide significantly prolonged the storage life,reduced the rot rate and weight loss rate,and slowed the loss of pulp of D. alata. The preservation effect of complex fresh-keeping agent of prochloraz diluent( 475 ×) and nano-titanium dioxide( 1. 0%) was better than that of other treatments.
