Comparación de cepas locales y comerciales de Simplicillium y Lecanicillium colonizando pústulas de Hemileia vastatrix

García-Nevárez, Gerardo; Hidalgo-Jaminson, Eduardo

doi:10.18781/r.mex.fit.1810-4

RMF

2019

DOI: 10.18781/r.mex.fit.1810-4

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Comparación de cepas locales y comerciales de Simplicillium y Lecanicillium colonizando pústulas de Hemileia vastatrix

Gerardo García-Nevárez¹,

Eduardo Hidalgo-Jaminson

Abstract: La roya es la enfermedad del café de mayor importancia económica, puede ocasionar pérdidas de producción superiores a 50%. La información sobre prácticas de control biológico aplicado para controlar la roya del café en Costa Rica es limitada. El estudio tuvo por objetivo seleccionar una cepa local de <em>Simplicillium</em> con alto grado de virulencia, así como evaluar la eficiencia de cepas comerciales de micoparásitos destinados al control de <em>H. vastatrix</em> en Costa Rica. El es… Show more

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Cited by 4 publications

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Survey of potential fungal antagonists of Coffee Leaf Rust (Hemileia vastatrix) on Coffea arabica in Hawai‘i, USA

Luiz,

Sugiyama,

Brill

et al. 2024

Braz J Microbiol

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Hemileia vastatrix, causal agent of coffee leaf rust (CLR), is an aggressive pathogen of coffee plants worldwide. Conventional fungicides play a major role in the suppression of this disease, but a recent shift toward eco-friendly farming practices has occurred and additional novel, effective, and sustainable strategies for CLR control are needed. Naturally occurring fungal antagonists could be well-positioned to meet this demand, but these fungi need to be isolated and tested for efficacy to identify organisms with potential. In this study, a survey of fungi associated with CLR lesions in four districts of Hawai‘i Island, HI, USA (Kona, Ka‘ū, Hāmākua, and Hilo) was conducted. Coffee leaves infected with CLR were collected from 22 locations and over 600 lesions were plated on ½ APDA and CTC 4T media. DNA was extracted from purified isolates and the internal transcribed spacer region (ITS) was sequenced and analyzed by BLASTn. In total, 194 isolates comprising 50 taxa were recovered. Several of the genera are known antagonists of CLR or other plant pathogens, including Simplicillium, Akanthomyces, Cladosporium, Fusarium, and Clonostachys. The wide diversity of fungi associated with CLR lesions provide a wealth of possibilities for identifying potential CLR antagonists that could serve as a valuable tool for coffee farmers as part of an integrated pest management plan.

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Survey of potential fungal antagonists of Coffee Leaf Rust (Hemileia vastatrix) on Coffea arabica in Hawai‘i, USA

Luiz,

Sugiyama,

Brill

et al. 2024

Braz J Microbiol

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Effects of Pseudomonas chlororaphis strain AFS009 and Beauveria bassiana strain GHA against Plumeria rust in Hawaii

Waisen¹,

Cheng²,

Criley³

2023

Plant Prot. Sci.

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PPSPlumeria (Plumeria spp.), a member of Apocynaceae family, is a perennial ornamental shrub found worldwide in tropical and subtropical climatic regions. This deciduous shrub is a popular ornamental that is grown for its beautiful foliage and fragrant flowers in parks and landscape establishments. In the states of Hawaii, Texas, Florida, and California, plumeria is a well-known landscape plant in residential and commercial settings. To date, eight species of Plumeria and Catharanthus roseus (L.) G. Don host plumeria rust (Coleosporium plumeriae Pat.) (Kakishima et al. 2017). The fungus attacks both mature and young leaves of plumeria but typically the latter are less susceptible due to high latex content. The latex demonstrated chitinase activity and is known to inhibit germination of uredinio spores (Weeraratne & Adikaram 2006). Infection is characterized by its powdery rust pustules of bright yelloworange urediniospores on the underside of leaves. The rust fungus is less likely to kill the plant or directly affect its flowers, but defoliation reduces its photosynthetic ability and aesthetic values of the ornamental.

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Agricultural Pest Management: The Role of Microorganisms in Biopesticides and Soil Bioremediation

Vermelho,

Moreira,

Akamine

et al. 2024

Plants

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Pesticide use in crops is a severe problem in some countries. Each country has its legislation for use, but they differ in the degree of tolerance for these broadly toxic products. Several synthetic pesticides can cause air, soil, and water pollution, contaminating the human food chain and other living beings. In addition, some of them can accumulate in the environment for an indeterminate amount of time. The agriculture sector must guarantee healthy food with sustainable production using environmentally friendly methods. In this context, biological biopesticides from microbes and plants are a growing green solution for this segment. Several pests attack crops worldwide, including weeds, insects, nematodes, and microorganisms such as fungi, bacteria, and viruses, causing diseases and economic losses. The use of bioproducts from microorganisms, such as microbial biopesticides (MBPs) or microorganisms alone, is a practice and is growing due to the intense research in the world. Mainly, bacteria, fungi, and baculoviruses have been used as sources of biomolecules and secondary metabolites for biopesticide use. Different methods, such as direct soil application, spraying techniques with microorganisms, endotherapy, and seed treatment, are used. Adjuvants like surfactants, protective agents, and carriers improve the system in different formulations. In addition, microorganisms are a tool for the bioremediation of pesticides in the environment. This review summarizes these topics, focusing on the biopesticides of microbial origin.

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Comparación de cepas locales y comerciales de Simplicillium y Lecanicillium colonizando pústulas de Hemileia vastatrix

Cited by 4 publications

References 4 publications

Survey of potential fungal antagonists of Coffee Leaf Rust (Hemileia vastatrix) on Coffea arabica in Hawai‘i, USA

Survey of potential fungal antagonists of Coffee Leaf Rust (Hemileia vastatrix) on Coffea arabica in Hawai‘i, USA

Effects of Pseudomonas chlororaphis strain AFS009 and Beauveria bassiana strain GHA against Plumeria rust in Hawaii

Agricultural Pest Management: The Role of Microorganisms in Biopesticides and Soil Bioremediation

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