Nematode parasites of coffee and cocoa.

Villain, Luc; Salgado, Sônia M. L.; Trinh, Quang Phap

doi:10.1079/9781786391247.0536

Cited by 20 publications

(22 citation statements)

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“…Another challenge faced by coffee growers in the state of Minas Gerais is the presence of plant‐parasitic nematodes (PPNs). In particular, Meloidogyne paranaensis, the most destructive PPN of coffee in Brazil (Villain, Salgado, & Trinh, 2018), has expanded its geographic distribution in recent years (Terra, Salgado, Fatobene, & Campos, 2019). This PPN destroys the root system of the coffee tree, especially the feeder roots, which are responsible for the absorption of water and nutrients (Peres et al, 2017), resulting in altered physiological processes and reduced plant growth (Goulart et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Root morphology, gas exchange and chlorophyll fluorescence of coffee cultivars and progenies are altered by Meloidogyne paranaensis infestation and water deficit

Pasqualotto

Salgado

Terra

et al. 2020

Journal of Phytopathology

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Climate change greatly influences coffee production, especially in areas infested with plant‐parasitic nematodes. In this study, coffee genotypes showed differences in their morphological and physiological characteristics when subjected to a water deficit and parasitism by Meloidogyne paranaensis. The cultivar IPR 100 had the largest superficial and volumetric root system area, even when parasitized. The two progenies (MG 0179‐1 and MG 0179‐3) and the cultivar Catuaí IAC 62 had a similar surface area (p < .05) when parasitized. However, the root surface area and volume of MG 0179‐3 increased by 96% and 400%, respectively, when parasitized by M. paranaensis. On the other hand, Catuaí IAC 62 had a 31% reduction in root surface area. Catuai 62 and IPR 100 showed higher sensitivity to drought when parasitized because of the increased photochemical sensitivity and reduction in photochemical quenching. In MG 0179‐1 and MG 0179‐3, an increase in non‐photochemical quenching occurred in response to stress, indicating that these progenies use a photochemical response to protect photosystem II. In this work, MG 0179‐3, which is resistant to M. paranaensis, was remarkable because, interestingly, the infestation caused an increase in its root surface area. In addition, MG 0179‐3 had relatively good photochemical performance under water deficit and M. paranaensis parasitism.

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Section: Introductionmentioning

confidence: 99%

Root morphology, gas exchange and chlorophyll fluorescence of coffee cultivars and progenies are altered by Meloidogyne paranaensis infestation and water deficit

Pasqualotto

Salgado

Terra

et al. 2020

Journal of Phytopathology

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“…In certain areas, coffee cultivation is only possible following grafting onto rootstock, which is resistant to RKNs ( 13 ), and some states actively enforce by law seedling certification for the absence of Meloidogyne spp. ( 144 ). However, in SSA, where coffee constitutes a major cash crop commodity, the impact of nematodes has, curiously, yet to be appreciated.…”

Section: Nematode Diversity and Crop Damagementioning

confidence: 99%

Plant-Parasitic Nematodes and Food Security in Sub-Saharan Africa

Coyne

Cortada

Dalzell

et al. 2018

Annu. Rev. Phytopathol.

211

149

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Sub-Saharan Africa (SSA) is a region beset with challenges, not least its ability to feed itself. Low agricultural productivity, exploding populations, and escalating urbanization have led to declining per capita food availability. In order to reverse this trend, crop production systems must intensify, which brings with it an elevated threat from pests and diseases, including plant-parasitic nematodes. A holistic systems approach to pest management recognizes disciplinary integration. However, a critical under-representation of nematology expertise is a pivotal shortcoming, especially given the magnitude of the threat nematodes pose under more intensified systems. With more volatile climates, efficient use of water by healthy root systems is especially crucial. Within SSA, smallholder farming systems dominate the agricultural landscape, where a limited understanding of nematode problems prevails. This review provides a synopsis of current nematode challenges facing SSA and presents the opportunities to overcome current shortcomings, including a means to increase nematology capacity.

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“…33.4). The galls are initially white to yellowish-brown and turn dark brown as the root becomes older (Villain et al, 2018).…”

Section: Symptoms Of Damagementioning

confidence: 99%