Screening for pathotype-specific resistance to broad bean wilt virus 2 and cucumber mosaic virus in pepper (<i>Capsicum annuum</i> L.)

Heo, Kyeong-Jae; Choi, Boram; Kim, Myung-Hwi; Kwon, Min-Jun; Cho, Young-Eun; Kwon, Sun‐Jung; Seo, Jang‐Kyun

doi:10.1017/s1479262121000472

Cited by 2 publications

(1 citation statement)

References 18 publications

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“…However, from a management perspective, the exact source, whether virus or vector, of the disease is likely less important, and the fact that farmers are already knowledgeable about the association of the presence of aphids and then the later appearance of a disease is a critical first step in developing sound management strategies. However, the first step in IPM is the use of host resistant varieties, and although host resistance to the major viral diseases detected in this study has been previously reported (Heo et al 2021;Ruffel et al 2005), resistance to arthropod pests, especially aphids, is rare (Frantz et al 2004). The successful deployment of virus-resistant cultivars as a management strategy in Benin will require that farmers be better educated about viruses.…”

Section: Discussionmentioning

confidence: 67%

Farmers’ Perception of Viral Diseases and Their Management in Pepper (Capsicum spp.) Production in Benin

Zohoungbogbo,

Ganta,

Oliva

et al. 2024

horts

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Pepper (Capsicum spp.) is an important solanaceous cash crop in Benin; however, productivity is limited due to several key constraints, especially diseases caused by viruses. We sought to understand farmers’ perceptions of viral diseases, management strategies deployed, and to identify the virus population affecting pepper production in Benin. To assess farmers’ perceptions and management of viral diseases, a survey was carried out in four agroecological zones of Benin. A total of 144 pepper farmers were interviewed using the snowball method. A total of 52 pepper leaf samples with virus-like symptoms were collected and diagnosed by reverse-transcriptase polymerase chain reaction (RT-PCR) or PCR. Pepper production systems varied across agroecological zones (P ≤ 0.001) with a predominance of farms practicing monoculture (82%). The majority of farmers (89%) indicated that pests and diseases were the main constraints to increased production. Cucumber mosaic virus (92% of the total samples), Pepper vein yellow virus (52%), and Pepper veinal mottle virus (50%) were the major viruses detected in pepper fields in Benin. There were both single (29%) and mixed (71%) infections of the viruses, suggesting that mixed infections are common for pepper in Benin, confounding efforts to reduce virus infections. Nearly 100% of the farmers surveyed were not aware of these viral diseases. They also could not directly relate symptoms of virus infection to the presence of aphids, whiteflies, or thrips. Farmers relied primarily on synthetic insecticides (93%) to control virus vectors. Interestingly, some farmers applied commercial (12%) and homemade (17%) biopesticides, with neem-based preparations being the most widely used. A total of 15% of farmers used companion cropping with maize, mint or basil and 43% of farmers used crop rotation as a cultural management practice to control viral disease and vector pressure in pepper fields. The implications of this work include the importance of training farmers and extension agents on diagnosis of viruses and their vectors causing viral diseases. This study provides baseline information for the development of host-resistant cultivars and deployment of integrated pest management strategies for pepper in Benin to reduce farmer losses.

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Section: Discussionmentioning

confidence: 67%

Farmers’ Perception of Viral Diseases and Their Management in Pepper (Capsicum spp.) Production in Benin

Zohoungbogbo,

Ganta,

Oliva

et al. 2024

horts

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Current knowledge and breeding strategies for management of aphid-transmitted viruses of pepper (Capsicum spp.) in Africa

Zohoungbogbo,

Vihou,

Achigan-Dako

et al. 2024

Front. Plant Sci.

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Aphid-transmitted viruses cause significant losses in pepper production worldwide, negatively affecting yield and quality. The emergence of new aphid-transmitted viruses or development of variants as well as the occurrence in mixed infections make management a challenge. Here, we overview the current status of the distribution, incidence and phylogeny of aphids and the viruses they transmit in pepper in Africa; outline the available genetic resources, including sources of resistance, resistance genes and molecular markers; and discuss the recent advances in understanding the genetic basis of resistance to the predominant African viruses infecting pepper. Pepper veinal mottle virus (PVMV; Potyvirus); Potato virus Y (PVY; Potyvirus), Chili veinal mottle virus (ChiVMV; Potyvirus), Cucumber mosaic virus (CMV; Cucumovirus) and Pepper veins yellow virus (PeVYV; Polerovirus) have been reported to be the most widespread and devastating aphid-transmitted viruses infecting pepper across Africa. Co-infection or mixed infection between aphid-transmitted viruses has been detected and the interrelationship between viruses that co-infect chili peppers is poorly understood. Establishing and evaluating existing and new diversity sets with more genetic diversity is an important component of developing host resistance and implementing integrated management strategies. However, more work needs to be done to characterize the aphid-transmitted viral strains across Africa and understand their phylogeny in order to develop more durable host resistance. In addition, a limited number of QTLs associated with resistance to the aphid-transmitted virus have been reported and QTL data are only available for PVY, ChiVMV and CMV mainly against European and Asian strains, although PVMV is likely the most important aphid-transmitted viral disease in Africa. There is a need to identify germplasm resources with resistance against various aphid-transmitted virus strains, and subsequent pyramiding of the resistance using marker-assisted selection could be an effective strategy. The recent advances in understanding the genetic basis of the resistance to the virus and the new breeding techniques that can be leveraged to accelerate breeding for aphid-transmitted virus in pepper are proposed as strategies to more efficiently develop resistant cultivars. The deployment of multi-genetic resistances in pepper is an effective and desirable method of managing viral-diseases in Africa and limit losses for farmers in a sustainable manner.

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Screening for pathotype-specific resistance to broad bean wilt virus 2 and cucumber mosaic virus in pepper (Capsicum annuum L.)

Cited by 2 publications

References 18 publications

Farmers’ Perception of Viral Diseases and Their Management in Pepper (Capsicum spp.) Production in Benin

Farmers’ Perception of Viral Diseases and Their Management in Pepper (Capsicum spp.) Production in Benin

Current knowledge and breeding strategies for management of aphid-transmitted viruses of pepper (Capsicum spp.) in Africa

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