Sabrina A. Cassol, Samuel A. Santos, Marston H. D. Franceschini, Flávia S. Alexandre, Davi M. Macedo, Chandan Pal, Emerson M. Del Ponte, Acelino C. Alfenas, Rafael F. Alfenas
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引用次数: 0
摘要
由 Ceratocystis fimbriata 引起的 Ceratocystis 枯萎病是影响猕猴桃(Actinidia spp.)此外,该病害还对其他主要猕猴桃生产国构成威胁,如中国、智利、新西兰和意大利,这些国家尚未有关于猕猴桃藤蔓感染该病害的报道。在猕猴桃藤蔓上,病菌一般从根部开始感染,但修剪伤口也可能成为病原体的侵入点。目前,还缺乏行之有效的策略来控制这种病害,也没有资料表明杀菌剂对预防 C. fimbriata 感染猕猴桃的有效性。在本研究中,我们评估了四种杀菌剂对 C. fimbriata 分离物的药效,这四种杀菌剂分别是:甲霜灵 + 代森锰锌、硼砂 + 甲霜灵、吡唑醚菌酯和氢氧化铜。我们发现,甲霜灵+锰锌和吡唑醚菌酯在体外抑制菌丝生长的效果最好。但是,在对两种猕猴桃栽培品种的修剪伤口保护剂进行评估时,这些杀菌剂在测试方法中没有效果。体外试验中发现的结果可以指导猕猴桃中 Ceratocystis 枯萎病化学防治方法的开发。此外,由于所测试的杀真菌剂都不能有效保护修剪伤口,防止猕猴桃藤蔓感染 C. fimbriata,因此在接下来的研究中必须对其他活性成分或施用方法进行评估。
Are fungicides effective in protecting pruning wounds against Ceratocystis wilt on kiwifruit vines?
Ceratocystis wilt, caused by Ceratocystis fimbriata, is the primary disease affecting kiwifruit (Actinidia spp.) and a major constraint for its cultivation and expansion in Brazil. Additionally, the disease poses a threat to other major kiwifruit-producing countries, such as China, Chile, New Zealand, and Italy, where the disease has not been reported on kiwifruit vines yet. In kiwifruit vines, the infection generally initiates through the roots, but pruning wounds can also serve as an entry point for the pathogen. Currently, there is a dearth of proven effective strategies for controlling this disease, and there is no information on the effectiveness of fungicides for preventing C. fimbriata infection on kiwifruit. In the present study, we evaluated the efficacy of four fungicides: metalaxyl + mancozeb, boscalide + cresoxim-methyl, pyraclostrobin, and copper hydroxide, against C. fimbriata isolates. We found that metalaxyl + mancozeb and pyraclostrobin were the most effective in inhibiting mycelial growth in vitro. However, when evaluating these fungicides as pruning wound protectors in two kiwifruit cultivars, these fungicides were not effective, in the method tested. The results found in the in vitro assays can guide the development of chemical control of Ceratocystis wilt in kiwifruit. Furthermore, as none of the fungicides tested here were effective in protecting pruning wounds against C. fimbriata infection in kiwifruit vines, other active ingredients or application methods must be evaluated in upcoming studies.
期刊介绍:
Tropical Plant Pathology is an international journal devoted to publishing a wide range of research on fundamental and applied aspects of plant diseases of concern to agricultural, forest and ornamental crops from tropical and subtropical environments.
Submissions must report original research that provides new insights into the etiology and epidemiology of plant disease as well as population biology of plant pathogens, host-pathogen interactions, physiological and molecular plant pathology, and strategies to promote crop protection.
The journal considers for publication: original articles, short communications, reviews and letters to the editor. For more details please check the submission guidelines.
Founded in 1976, the journal is the official publication of the Brazilian Phytopathology Society.