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Potential of Chitosan for the Control of Powdery Mildew ( Leveillula taurica (Lév.) Arnaud) in a Jalapeño Pepper ( Capsicum annuum L.) Cultivar

One of the phytopathogens that cause severe damage to jalapeño pepper is (Lév.) Arnaud, the causative agent of powdery mildew. Synthetic fungicides are currently employed for its control, contributing to adverse effects on human health and the environment. The main objective of this research was to...

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Published in:Plants (Basel) 2024-03, Vol.13 (7), p.915
Main Authors: Jiménez-Pérez, Omar, Gallegos-Morales, Gabriel, Espinoza-Ahumada, Cesar Alejandro, Delgado-Luna, Carolina, Preciado-Rangel, Pablo, Espinosa-Palomeque, Bernardo
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container_title Plants (Basel)
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creator Jiménez-Pérez, Omar
Gallegos-Morales, Gabriel
Espinoza-Ahumada, Cesar Alejandro
Delgado-Luna, Carolina
Preciado-Rangel, Pablo
Espinosa-Palomeque, Bernardo
description One of the phytopathogens that cause severe damage to jalapeño pepper is (Lév.) Arnaud, the causative agent of powdery mildew. Synthetic fungicides are currently employed for its control, contributing to adverse effects on human health and the environment. The main objective of this research was to identify the causal agent of powdery mildew and assess the efficacy of chitosan in powdery mildew control on jalapeño pepper. The following treatments were evaluated in laboratory and greenhouse conditions: T1 = 0.0125% chitosan, T2 = 0.0025% chitosan, T3 = 0.05% chitosan, T4 = 0.1% chitosan, T5 = 0.2% chitosan, T6 = tebuconazole 25% (1.8 mL/L water), and T7 = control (water). Symptomatology results indicated that is indeed the causative agent of powdery mildew. Treatments T4 and T5 exhibited the lowest percentages of incidences and severity, hence achieving higher control efficacy in the laboratory (57.70 ± 3.85 and 65.39 ± 3.85) and greenhouse (56.67 ± 4.08 and 70 ± 8.16%) compared to T6 (control efficacy, 38.46 ± 0.00% in the laboratory and 50 ± 0.00% in the greenhouse). The chitosan derived from shrimp had a significant impact on the cell walls of . spores and mycelium. Consequently, chitosan emerges as a viable organic alternative to fungicides for controlling powdery mildew in jalapeño pepper.
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source PubMed Central Free; Publicly Available Content Database
subjects agrochemicals
Airborne microorganisms
biopolymer
Cell walls
Chitosan
control efficacy
Crop diseases
Cultivars
Effectiveness
Fungicides
Greenhouses
Humidity
Leaves
Leveillula taurica
Microorganisms
Peppers
Plant growth
Powdery mildew
Spores
Tebuconazole
Vegetables
title Potential of Chitosan for the Control of Powdery Mildew ( Leveillula taurica (Lév.) Arnaud) in a Jalapeño Pepper ( Capsicum annuum L.) Cultivar
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