Developing Sustainable Disease Resistance in Coffee

Kumar, Avinash; Sreedharan, Simmi P.; Shetty, Nandini P.; Giridhar, P.

doi:10.1002/9781118867716.ch11

Cited by 6 publications

(5 citation statements)

References 128 publications

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“…Today, H. vastatrix is able to infect all known cultivated species in the genus Coffea , albeit at different levels of severity (McCook, ). Since the first significant outbreak in Sri Lanka (Ceylon) in 1869, almost the entire world's coffee producing zones have reported coffee leaf rust attacks, resulting in up to 40% annual yield losses (Arneson, ; Kumar, Sreedharan, Shetty, & Parvatam, ; McCook, ).…”

Section: Introductionmentioning

confidence: 99%

“…Hemileia vastatrix penetrates coffee leaves via the stomatal openings and grows nutrient‐absorbing mycelium through the leaf mesophyll. Vibrant bouquet‐shaped, orange uredinia and telia are produced on the abaxial side of the coffee leaves (Arneson, ; Kumar et al, ). Uredinia give rise to urediniospores, which are dikaryotic and the only reported means of propagation for H. vastatrix (Arneson, ; Carvalho, Fernandes, Carvalho, Barreto, & Evans, ) (Figure ).…”

Section: Introductionmentioning

confidence: 99%

“…Lanka (Ceylon) in 1869, almost the entire world's coffee producing zones have reported coffee leaf rust attacks, resulting in up to 40% annual yield losses (Arneson, 2000;Kumar, Sreedharan, Shetty, & Parvatam, 2016;McCook, 2006).…”

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On the hunt for the alternate host of Hemileia vastatrix

Koutouleas

Jørgensen

Jensen

et al. 2019

Ecology and Evolution

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Coffee leaf rust (CLR), caused by the fungal pathogen Hemileia vastatrix, has plagued coffee production worldwide for over 150 years. Hemileia vastatrix produces urediniospores, teliospores, and the sexual basidiospores. Infection of coffee by basidiospores of H. vastatrix has never been reported and thus far, no alternate host, capable of supporting an aecial stage in the disease cycle, has been found. Due to this, some argue that an alternate host of H. vastatrix does not exist. Yet, to date, the plant pathology community has been puzzled by the ability of H. vastatrix to overcome resistance in coffee cultivars despite the apparent lack of sexual reproduction and an aecidial stage. The purpose of this study was to introduce a new method to search for the alternate host(s) of H. vastatrix. To do this, we present the novel hypothetical alternate host ranking (HAHR) method and an automated text mining (ATM) procedure, utilizing comprehensive biogeographical botanical data from the designated sites of interests (Ethiopia, Kenya and Sri Lanka) and plant pathology insights. With the HAHR/ATM methods, we produced prioritized lists of potential alternate hosts plant of coffee leaf rust. This is a first attempt to seek out an alternate plant host of a pathogenic fungus in this manner. The HAHR method showed the highest‐ranking probable alternate host as Psychotria mahonii, Rubus apetalus, and Rhamnus prinoides. The cross‐referenced results by the two methods suggest that plant genera of interest are Croton, Euphorbia, and Rubus. The HAHR and ATM methods may also be applied to other plant–rust interactions that include an unknown alternate host or any other biological system, which rely on data mining of published data.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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On the hunt for the alternate host of Hemileia vastatrix

Koutouleas

Jørgensen

Jensen

et al. 2019

Ecology and Evolution

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“…

Around 2 billion cups of coffee are consumed daily, worldwide (Reay, 2019). However, the coffee plant is under threat due to its vulnerability to a plethora of plant pests and diseases, exacerbated by climate change (Avelino, ten Hoopen, et al, 2012;Kumar et al, 2016).In fact, the typical coffee farmer faces a diverse onslaught by an assortment of beetles, bacteria, fungi and nematodes in just one production season (Waller et al, 2007). Traditional chemical pesticides (i.e., insecticides and fungicides) have been a mainstay of the Green Revolution, and thus commonly deployed in coffee production.

…”

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confidence: 99%

“…Around 2 billion cups of coffee are consumed daily, worldwide (Reay, 2019). However, the coffee plant is under threat due to its vulnerability to a plethora of plant pests and diseases, exacerbated by climate change (Avelino, ten Hoopen, et al, 2012;Kumar et al, 2016).…”

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confidence: 99%

Alternative plant protection strategies for tomorrow's coffee

2022

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Around 2 billion cups of coffee are consumed daily, worldwide (Reay, 2019). However, the coffee plant is under threat due to its vulnerability to a plethora of plant pests and diseases, exacerbated by climate change (Avelino, ten Hoopen, et al., 2012;Kumar et al., 2016).In fact, the typical coffee farmer faces a diverse onslaught by an assortment of beetles, bacteria, fungi and nematodes in just one production season (Waller et al., 2007). Traditional chemical pesticides (i.e., insecticides and fungicides) have been a mainstay of the Green Revolution, and thus commonly deployed in coffee production. With more than 470 licensed products approved for use in Brazil alone (Coelho et al., 2019), these agrochemicals are being used as a primary means of management in the onset of pests and diseases across all agricultural sectors including coffee (

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