Effect of temperature, wetness duration and cultivar on the development of anthracnose in guava fruits

Soares-Colletti, Ana Raquel; Lourenço, Silvia de Afonseca

doi:10.1590/0100-5405/1988

Cited by 8 publications

(4 citation statements)

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“…Under high temperature conditions, pathogens can grow rapidly and severe outbreaks of disease are expected in environments with high relative humidity (Moral et al, 2012). According to Soares-Colletti and Lourenço (2014), the infection rate is high in the range of 15 to 30 ºC for C. gloeosporioides, with the ideal temperature around 25 ºC. However, for C. acutatum like C. typhae a maximum incidence of this pathogen was occurred at 20 °C.…”

Section: Resultsmentioning

confidence: 99%

Potential of Colletotrichum typhae H.C Greene mycoherbicide for bio-control of Southern cattail (Typha domingensis Pers.) plants

et al. 2020

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The anthropic interference in aquatic ecosystems favors the disordered colonization of T. domingensis, damaging the production of hydroelectric power and river traffic. Because of this, studies report the efficacy of fungal mycoherbicides, with control rates reaching as high as 90%. Thus, the objective of this study was to evaluate the potential of C. typhae as a mycoherbicide in bio control of T. domingensis, at in vitro and greenhouse conditions. 107 samples of symptomatic T. domingensis leaves were collected in flooded areas of rivers in Brazil, with identification and isolation of the collected fungal species. The concentration of inoculum was determined to evaluate the incidence and severity of the disease, the influence of temperature on mycelial growth and conidia germination, the effect of temperature and leaf wetness period on T. domingensis infection by C. typhae and the host range test in vitro. The growth of the colonies of C. typhae was higher at 25 to 30 ºC. There was no interference of the photoperiod on germination of the spores, but the highest percentage of germination was occurred at 20 ºC. The influence of environmental conditions on infection of inoculated leaves of T. dominguensis revealed that at 15 ºC and the period of leaf wetness of 48 hours the highest incidence of the disease was observed, as well as the severity for the same period of leaf wetness. The specificity test showed that C. typhae is specifically pathogenic to T. domingensis. This the first report of the occurrence of this pathogen in aquatic macrophytes of this species and in T. domingensis, a potential mycoherbicide for the control of this aquatic weed.

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Section: Resultsmentioning

confidence: 99%

Potential of Colletotrichum typhae H.C Greene mycoherbicide for bio-control of Southern cattail (Typha domingensis Pers.) plants

et al. 2020

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“…Under high temperature conditions, pathogens can grow rapidly and severe outbreaks of disease are expected in environments with high relative humidity [31]. According to Soares-Colletti and Lourenço [32], the infection rate is high in the range of 15 to 30 ºC for C. gloeosporioides , with the ideal temperature around 25 ºC, however, for C. acutatum as for C. typhae a maximum incidence of this pathogen occurred at 20 °C. Regarding the wetness period, the results obtained in this study with C. typhae coincide with those found by Soares, Lourenço and Amorim [33], who reported that the greater severity of anthracnose caused by C. acutatum and C. gloeosporioides was high after 48 hours.…”

Section: Resultsmentioning

confidence: 99%

Biological Potencial of Colletotrichum typhae H.C Greene mycoherbicide for Typha domingensis Pers

Maia

Melo

Barreto

et al. 2018

Preprint

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24 The anthropic interference in aquatic ecosystems, favors the disordered colonization of T. domingensis, 25 damaging the production of hydroelectric power and river traffic. Thus, the objective of this study was 26 to evaluate the potential of C. typhae as a mycoherbicide in the control of T. domingensis, in vitro and 27 in greenhouse. 107 samples of symptomatic T. domingensis leaves were collected in flooded areas of 28 rivers in Brazil, with identification and isolation of the collected fungal species. The concentration of 29 inoculum was determined to evaluate the incidence and severity of the disease, the influence of 30 temperature on mycelial growth and conidia germination, the effect of temperature and leaf wetness 31 period on T. domingensis infection by C. typhae and the host range test. The growth of the colonies of 32 C. typhae was higher at 25 to 30 ºC, there was no interference of the photoperiod on germination of the 33 spores, but the highest percentage of germination occurred at 17.39 ºC. The influence of environmental 2 34 conditions on infection of inoculated leaves of T. dominguensis indicated that at 15 ºC and the period of 35 leaf wetness of 48 hours promoted the highest incidence of the disease, as well as the severity for the 36 same period of leaf wetness. The specificity test showed that C. typhae is specific and pathogenic to T. 37 domingensis. Being this the first report of the occurrence of this pathogen in aquatic macrophytes of 38 this species and in T. domingensis in Brazil. 39 Keywords: Biological control; Aquatic macrophytes, Leaf wetness 40 41 Introduction 42 Typha domingensis Pers. is an invasive macrophyte found in the Americas, Europe, Africa, Asia and 43 Oceania, being considered as a native species of South America, occurring throughout Brazil [1]. It is 44 propagated either by seeds or vegetatively, by rhizomes, with vigorous growth by the decomposition 45 and assimilation of organic matter as a source of nutrients, reaching about seven tons of rhizomes per 46 hectare [2]. Thus, T. domingensis is used as a biological filter for urban sewage, industrial effluents rich 47 in heavy metals and erosion control in drainage channels and reservoir banks [3]. 48However, anthropic interference in aquatic ecosystems favors the colonization of T. domingensis, 49 which may hinder the production of hydroelectric power, river traffic and agricultural irrigation [4]. In 50 the United States, this macrophyte accounts for the degradation of almost 12.000 ha -1 of Florida 51 marshes, due its aggressive growth in response to eutrophication by nitrates and phosphates from 52 agricultural and urban waste and frequent fires [5]. In Brazil, it is estimated that the intense growth of 53 T. domingensis in reservoirs of the country's hydroelectric dams extends to about 300 ha -1 in the water 54 mirror. These changes contribute to the reduction of water quality and biodiversity patterns in 55 environments colonized by this species [6]. 56Up to a certain limit, the development of aquatic vegetation c...

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“…The core structure of the model is based on Zadoks (1971), with sites evolving from healthy (H), to latent (L), to visible (V), to infectious (I), and finally to removed (R). (Smith and Rose, 1995;Fall et al, 2016); among these coefficients, Ubias indicates the mean difference between observed and predicted disease; Uslope indicates the deviations from the 1:1 line; and Uerror indicates the unexplained variance.…”

Section: Model Evaluationmentioning

confidence: 99%

Development of a model for Colletotrichum diseases with calibration for phylogenetic clades on different host plants

Salotti

Liang

et al. 2023

Front. Plant Sci.

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Fungi in the genus Colletotrichum cause serious pre- and post-harvest losses to several agricultural crops worldwide. Through a systematic literature review, we retrieved the published information on Colletotrichum anthracnose diseases on different host plants and developed a mechanistic model incorporating the main stages of the pathogen’s life cycle and the effect of weather. The model predicts anthracnose progress during the growing season on the aerial organs of different crops, and was parameterized for seven Colletotrichum clades (acutatum, dematium, destructivum, gloeosporioides, graminicola, and orbiculare) and the singleton species, C. coccodes. The model was evaluated for the anthracnose diseases caused by fungi belonging to five clades on six hosts by using data from 17 epidemics that occurred in Italy, the USA, Canada, and Japan. A comparison of observed versus predicted data showed a concordance correlation coefficient of 0.928 and an average distance between real data and the fitted line of 0.044. After further validation, the model could be used to support decision-making for crop protection.

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Effect of temperature, wetness duration and cultivar on the development of anthracnose in guava fruits

Cited by 8 publications

References 20 publications

Potential of Colletotrichum typhae H.C Greene mycoherbicide for bio-control of Southern cattail (Typha domingensis Pers.) plants

Potential of Colletotrichum typhae H.C Greene mycoherbicide for bio-control of Southern cattail (Typha domingensis Pers.) plants

Biological Potencial of Colletotrichum typhae H.C Greene mycoherbicide for Typha domingensis Pers

Development of a model for Colletotrichum diseases with calibration for phylogenetic clades on different host plants

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