{"title":"In-vitro and field evaluation of foliar fungicides for the management of Alternaria leaf blight in Radish (Raphanus sativus L.)","authors":"","doi":"10.1016/j.cropro.2024.106967","DOIUrl":null,"url":null,"abstract":"<div><div>Radish, a member of the Brassicaceae family, is a widely cultivated edible root vegetable. Despite its popularity, radish cultivation faces significant challenges due to various pests and diseases, majorly Alternaria leaf blight (ALB) caused by <em>Alternaria brassicicola</em>. To overcome this challenge, an evaluation of eight fungicides consisting of three contact (Chlorothalonil, Propineb, Copper oxychloride), four systemic (Azoxystrobin, Hexaconazole, Propiconazole, Tebuconazole) and a combination (Metalaxyl-M + Mancozeb), was carried out against ALB under <em>in-vitro</em> and field conditions. The efficacy of eight fungicides at varying concentrations (100, 250, 500 and 750 ppm) in inhibiting mycelial growth and conidial germination of <em>A. brassicicola</em> was evaluated. The results showed Tebuconazole to be the most effective fungicide in inhibiting both mycelial growth (100%) and conidial germination (90.70%) at the highest concentration, followed by Propiconazole, Azoxystrobin and Hexaconazole with EC<sub>90</sub> of 89.9, 98.8, 105.6, and 101.2 μg mL<sup>−1</sup>, respectively. Fungicides such as Tebuconazole, Propiconazole and Azoxystrobin had higher conidial germination inhibition, with lower EC<sub>50</sub> of 177.2, 198.2 and 200.7 μg mL<sup>−1</sup>, respectively. To confirm these findings, field trials were conducted over two growing seasons. The foliar spraying of Tebuconazole at 1 ml/L significantly outperformed other treatments, resulting in the lowest PDI (7.67%) and highest radish root yield (13.62 tons/ha). Propiconazole and Azoxystrobin treatments also showed promising results, while untreated controls exhibited the lowest yields of 8.83 tons/ha. Based on the study and information generated, Tebuconazole at 1 ml/L could be recommended and incorporated as a preventive or curative measure in radish ALB management programs.</div></div>","PeriodicalId":10785,"journal":{"name":"Crop Protection","volume":null,"pages":null},"PeriodicalIF":2.5000,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Crop Protection","FirstCategoryId":"97","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0261219424003958","RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"AGRONOMY","Score":null,"Total":0}
引用次数: 0
Abstract
Radish, a member of the Brassicaceae family, is a widely cultivated edible root vegetable. Despite its popularity, radish cultivation faces significant challenges due to various pests and diseases, majorly Alternaria leaf blight (ALB) caused by Alternaria brassicicola. To overcome this challenge, an evaluation of eight fungicides consisting of three contact (Chlorothalonil, Propineb, Copper oxychloride), four systemic (Azoxystrobin, Hexaconazole, Propiconazole, Tebuconazole) and a combination (Metalaxyl-M + Mancozeb), was carried out against ALB under in-vitro and field conditions. The efficacy of eight fungicides at varying concentrations (100, 250, 500 and 750 ppm) in inhibiting mycelial growth and conidial germination of A. brassicicola was evaluated. The results showed Tebuconazole to be the most effective fungicide in inhibiting both mycelial growth (100%) and conidial germination (90.70%) at the highest concentration, followed by Propiconazole, Azoxystrobin and Hexaconazole with EC90 of 89.9, 98.8, 105.6, and 101.2 μg mL−1, respectively. Fungicides such as Tebuconazole, Propiconazole and Azoxystrobin had higher conidial germination inhibition, with lower EC50 of 177.2, 198.2 and 200.7 μg mL−1, respectively. To confirm these findings, field trials were conducted over two growing seasons. The foliar spraying of Tebuconazole at 1 ml/L significantly outperformed other treatments, resulting in the lowest PDI (7.67%) and highest radish root yield (13.62 tons/ha). Propiconazole and Azoxystrobin treatments also showed promising results, while untreated controls exhibited the lowest yields of 8.83 tons/ha. Based on the study and information generated, Tebuconazole at 1 ml/L could be recommended and incorporated as a preventive or curative measure in radish ALB management programs.
期刊介绍:
The Editors of Crop Protection especially welcome papers describing an interdisciplinary approach showing how different control strategies can be integrated into practical pest management programs, covering high and low input agricultural systems worldwide. Crop Protection particularly emphasizes the practical aspects of control in the field and for protected crops, and includes work which may lead in the near future to more effective control. The journal does not duplicate the many existing excellent biological science journals, which deal mainly with the more fundamental aspects of plant pathology, applied zoology and weed science. Crop Protection covers all practical aspects of pest, disease and weed control, including the following topics:
-Abiotic damage-
Agronomic control methods-
Assessment of pest and disease damage-
Molecular methods for the detection and assessment of pests and diseases-
Biological control-
Biorational pesticides-
Control of animal pests of world crops-
Control of diseases of crop plants caused by microorganisms-
Control of weeds and integrated management-
Economic considerations-
Effects of plant growth regulators-
Environmental benefits of reduced pesticide use-
Environmental effects of pesticides-
Epidemiology of pests and diseases in relation to control-
GM Crops, and genetic engineering applications-
Importance and control of postharvest crop losses-
Integrated control-
Interrelationships and compatibility among different control strategies-
Invasive species as they relate to implications for crop protection-
Pesticide application methods-
Pest management-
Phytobiomes for pest and disease control-
Resistance management-
Sampling and monitoring schemes for diseases, nematodes, pests and weeds.