果树学报2025，Vol.42Issue(5)：1067-1076,10.DOI:10.13925/j.cnki.gsxb.20240666
花期飞防和采后壳聚糖处理对板栗内腐病的防治效果
Study on rot disease prevention by aerial fungicides application during the flower stage and post-harvest chitosan treatment in Chinese chestnut
摘要
Abstract
[Objective]In recent years,Chinese chestnut(Castanea mollissima Blume)rot disease has shown an outbreak trend in the chestnut-producing areas of Yanshan mountain in China.The annual rate of chestnut rot disease ranges from 7％to 10％,resulting in enormous economic losses for producers and operators.Among the prevention and control measures against chestnut rot disease,the research on spraying agents during the flowering period of chestnuts still needs to continue.This study aimed to screen out effective methods for the prevention and control of chestnut rot disease.[Methods]The Yan-shanzaofeng cultivar was selected as the principal experimental material within two chestnut orchards located in Qianxi County,Tangshan City,Hebei Province.Through the utilization of drones,different chemical agents were sprayed during the flowering period to select effective chenmicals suppressing in-ternal rot disease.Furthermore,a chitosan treatment was implemented post harvest to test the inhibitory effect on the disease during storage.[Results]3 g·L-1 azoxystrobin could significantly lower the rate of Chinese chestnut rot disease.After 4 months of cold storage,the average internal rot rate of Chinese chestnut was 2.71％,6.42％lower than that of the control.Furthermore,there were no significant differ-ences in the impacts on the pollination and yield indicators of Chinese chestnuts,as well as on the starch content and soluble sugar content of chestnut kernels among the different chemical treatments.In addition,the post-harvest chitosan preservation treatment could reduce the respiration intensity and internal rot rate of chestnut kernels.The chitosan preservation treatment on the chestnuts sprayed with 3 g·L-1 azoxystrobin(AJY-4)during the flowering stage could reduce the internal rot rate of chestnut kernels to 1.21％after 4 months of cold storage.Moreover,after 7 months of cold storage,the average internal rot rate of chestnut kernels was 2.40％,which was 1.90％lower than that of the control.The treatment of chitosan compound agents could significantly inhibit the occurrence of calcinosis in chest-nut kernels.After 4 months of storage,the calcinosis rate of chestnut kernels with chitosan compound agent treatment was 2.14％,2.01％lower than that of the control.After 7 months of storage,the calcino-sis rate of chestnut kernels with chitosan compound agent treatment was 3.59％,2.93％lower than that of the control.The treatment of chitosan compound agents could significantly inhibit the respiration rate of chestnut kernels as well.The treatment of chitosan compound agents did not make significant differ-ence the quality of the chestnut kernels.[Conclusion]3 g·L-1 azoxystrobin was capable of markedly di-minishing the occurrence rate of internal rot in chestnut kernels.Moreover,this treatment did not have an adverse impact on pollination,yield,and the quality of the chestnut kernels.Concurrently,the appli-cation of chitosan compound agents before storage was effective in reducing both the respiration rate and the internal rot rate of the chestnut kernels.关键词
无人机飞防/嘧菌酯/壳聚糖/内腐率/栗仁品质Key words
Aerial fungicides/Azoxystrobin/Chitosan/Rate of rot disease/Quality of Chinese chestnut分类
农业科技引用本文复制引用
刘阳,孙海涛,王振,于亚鑫,于春欣,秦岭,王凤春,邢宇..花期飞防和采后壳聚糖处理对板栗内腐病的防治效果[J].果树学报,2025,42(5):1067-1076,10.基金项目
国家重点研发计划(2024YFD2200602) （2024YFD2200602）
