摘要
薄壳山核桃[Carya illinoinensis(Wangenh.)K.Koch]又称美国山核桃,是绿化的优选树种,其果实又称碧根果是世界著名的干果之一。薄壳山核桃原产于美国和墨西哥北部,因其较高的经济价值已被引种到全球20多个国家和地区[1-2]。江苏是我国薄壳山核桃引种较早的省份之一[3],江苏句容拥有万亩薄壳山核桃基地,发展势头良好。随着薄壳山核桃种植面积的扩大,病虫害问题突显,褐斑病在江苏句容相继发生,导致叶斑,果腐,落果,经济损失严重。
The pecan tree[Carya illinoinensis(Wangenheim)K.Koch]produces seeds with high nutritional value and medicinal properties.Brown spot is one of the most important diseases of pecan in China,especially in Jiangsu province.Disease incidence ranged from 10%to 20%in the affected fields,which seriously affected the yield and quality of fruits.In this study,by tissue separation method,two Colletotrichum-like isolates were isolated from diseased pecan in different planting areas in Jurong.In order to identify these isolates,typical morphological characteristics were analyzed,phylogenetic tree was constructed based on ITS-TUB2-GAPDH-CHS-1-ACT genes,and their pathogenicities were tested.The results showed that ten strains were pathogenic and identified as C.fructicola and C.viniferum.Pathogenicity tests showed that all of the isolates could induce leaf necrosis,displaying variable pathogenicites for different strains.This is the first report of C.fructicola and C.viniferum causing pecan blackspot in Jurong,Jiangsu province,which will provide theoretical basis for further study of disease monitoring and control and breeding of disease resistance in pecan cultivars.
作者
赵玉强
卓可儿
郭云
朱倩丽
朱灿灿
田艳丽
胡白石
ZHAO Yuqiang;ZHUO Keer;GUO Yun;ZHU Qianli;ZHU Cancan;TIAN Yanli;HU Baishi(Institute of Botany,Jiangsu Province and Chinese Academy of Sciences(Nanjing Botanical Garden Mem.Sun Yat-Sen),Nanjing 210014,China;College of Plant Protection,Nanjing Agricultural University,Nanjing 210095,China;Key Laboratory of Integrated Management of Crop Diseases and Pests,Ministry of Education,Nanjing 210095,China)
出处
《植物病理学报》
CAS
CSCD
北大核心
2023年第3期514-517,共4页
Acta Phytopathologica Sinica
基金
中央财政林业科技推广示范项目[苏(2019)TG04]
2021年江苏省重点研发计划(BE2021406)
