Inquiry Basket
Loading ......
Peanut stunt virus (PSV) is a significant viral pathogen that affects peanut (Arachis hypogaea) and a wide range of other leguminous crops, as well as various non-leguminous hosts. First described in the United States in the 1960s, PSV has since been reported in many peanut-growing regions around the world, including Africa, Asia, Europe, and Australia. The virus belongs to the genus Cucumovirus within the family Bromoviridae, making it a close relative of other well-known plant viruses such as Cucumber mosaic virus (CMV) and Tomato aspermy virus. PSV is particularly concerning because of its broad host range, efficient aphid transmission, and ability to cause severe yield losses under favorable conditions. This article provides a comprehensive introduction to Peanut stunt virus, covering its pathogen biology, epidemiology, symptomology, detection methods, and integrated management approaches.
Figure 1.Peanut Stunt Virus.
Peanut stunt virus is a member of the genus Cucumovirus, family Bromoviridae. The viral genome consists of three single-stranded, positive-sense RNA molecules, designated RNA1, RNA2, and RNA3. A fourth subgenomic RNA, RNA4, is derived from RNA3 and encodes the viral coat protein. RNA1 and RNA2 encode proteins involved in viral replication, while RNA3 encodes the movement protein and, via its subgenomic RNA4, the coat protein. The virions are isometric (spherical) particles approximately 28 to 30 nanometers in diameter. PSV is serologically related to other cucumoviruses, particularly CMV, which can sometimes lead to cross-reactivity in antibody-based detection methods. Several distinct strains of PSV have been identified based on host range, symptom severity, and molecular characteristics, including the type strain and strains adapted to specific legume hosts.
One of the most notable features of Peanut stunt virus is its exceptionally wide host range. PSV naturally infects more than 20 plant families, including Fabaceae (legumes), Solanaceae (nightshades), Asteraceae (sunflower family), and Cucurbitaceae (cucurbits). Economically important crops susceptible to PSV include peanut (Arachis hypogaea), soybean (Glycine max), common bean (Phaseolus vulgaris), cowpea (Vigna unguiculata), chickpea (Cicer arietinum), pea (Pisum sativum), and various forage legumes such as clover (Trifolium spp.) and alfalfa (Medicago sativa). Non-leguminous crops such as tobacco (Nicotiana tabacum), tomato (Solanum lycopersicum), pepper (Capsicum spp.), and cucumber (Cucumis sativus) are also susceptible. In addition, numerous weed species serve as natural reservoirs for PSV, including lamb's quarters (Chenopodium album), jimsonweed (Datura stramonium), and various nightshade species. This broad host range allows PSV to persist in agricultural landscapes even when peanut crops are not present, complicating eradication efforts.
Peanut stunt virus is transmitted naturally by several species of aphids in a non-persistent manner. The most important vectors include the pea aphid (Acyrthosiphon pisum), the green peach aphid (Myzus persicae), the cotton aphid (Aphis gossypii), and the cowpea aphid (Aphis craccivora). In non-persistent transmission, aphids acquire the virus within seconds to minutes of feeding on an infected plant and can immediately transmit it to a healthy plant. However, the aphid retains the virus for only a few hours at most, and there is no latent period. This mode of transmission has profound implications for disease management because insecticide applications targeting aphids are largely ineffective; by the time the aphid is killed, it has already transmitted the virus. PSV is also readily transmitted mechanically through contaminated tools, hands, or plant-to-plant contact, which can be a significant factor in densely planted crops or during agricultural operations such as pruning and trellising. Unlike some other legume viruses, PSV is not known to be transmitted through seed in peanut, although seed transmission has been reported in some other legume hosts at very low rates.
The symptoms induced by Peanut stunt virus vary considerably depending on the host species, virus strain, plant age at infection, and environmental conditions. In peanut, the disease was named for the most characteristic symptom: severe stunting of the entire plant. Infected peanut plants typically exhibit a compact, bushy appearance with shortened internodes and reduced leaf size. Leaf symptoms include mild to severe mosaic patterns, mottling, chlorotic ringspots, and downward curling of leaflets. In some sensitive cultivars, systemic necrosis may develop, leading to plant death. Pod production is severely reduced, and the pods that do form are often small, malformed, and may fail to fill properly, resulting in complete crop loss in cases of early infection. In soybean, PSV causes stunting, leaf rolling, mosaic, and yellowing, with yield reductions of up to 50 percent in susceptible varieties. In common bean and cowpea, symptoms include systemic mosaic, leaf distortion, and reduced pod set. In clover and alfalfa, PSV often produces mild mottling or may remain asymptomatic, allowing these forage legumes to serve as cryptic reservoirs. In tomato and pepper, PSV can induce stunting, leaf curling, and fruit deformation, although symptoms are generally less severe than those caused by CMV. A characteristic feature of PSV infection is the pronounced stunting symptom, which distinguishes it from many other legume viruses that primarily cause mosaic or yellowing without major growth reduction.
PSV often occurs in mixed infections with other legume viruses, including Cucumber mosaic virus, Peanut mottle virus, and Bean common mosaic virus. Synergistic interactions can result in more severe symptoms and greater yield loss than either virus alone. In mixed PSV and CMV infections, symptom expression may be exaggerated, and virus titers of both viruses can be altered. Mixed infections also complicate diagnosis because symptoms may not be typical of either virus individually. Additionally, PSV infection can predispose plants to secondary fungal or bacterial infections by compromising plant defense responses and reducing overall plant vigor. Enzyme-linked immunosorbent assay (ELISA) is the most widely used method for routine detection of PSV, and the commercial Peanut stunt virus (PSV) ELISA Kit provides a standardized, ready-to-use solution that enables sensitive and specific detection of the viral coat protein in peanut leaf and seed tissues. This kit is particularly valuable for large-scale field surveys and seed health certification programs, offering reliable results without the need for specialized molecular equipment.
Peanut stunt virus is a economically important pathogen of peanut and numerous other legume crops worldwide. Its broad host range, efficient non-persistent transmission by aphids, and ability to cause severe stunting and yield loss make it a significant challenge for growers and plant health professionals. While no single management tactic is fully effective, integrated approaches combining resistant cultivars, cultural practices, vector management, and accurate diagnostics can reduce disease impact. Continued research into virus biology, host resistance, and epidemiological modeling will be essential to protect global legume production from this emerging viral threat.
| Cat. No. | Product Name | Size | Application | |
| DEIAPV213 | Peanut Stunt Virus - Western Strain (PSV-WS) ELISA Kit | 500T/1000T/5000T | Qualitative | Inquiry |
| DEIAPV214 | Peanut stunt virus (PSV) ELISA Kit | 500T/1000T/5000T | Qualitative | Inquiry |
| DEIAPV211 | Peanut Green Mosaic Virus (PGMV) ELISA Kit | 500T/1000T/5000T | Qualitative | Inquiry |
| DEIAPV212 | Peanut Mottle Virus (PeMoV) ELISA Kit | 500T/1000T/5000T | Qualitative | Inquiry |
Loading ......
