cowpea aphid aphis craccivora

Rani and Pratyusha [64] evaluated the response of cotton to the attack of Spodoptera litura (Lepidoptera: Noctuide) and observed high levels of the oxidative enzymes superoxide dismutase catalase and peroxidase, along with PPO and phenylalanine ammonia lyase in the plants that were infested with this insect. Overview. Crop spacing may affect the landing response of flying aphids. A. craccivora caused pod shrivelling at the young and mid‐fill pod stages, on which the aphid was more fecund. Aphid, Aphis craccivora Koch (Homoptera: Aphididae), is one of the most widespread and destructive insect pests of cowpea and host-plant resistance is an effective approach to minimize the pest damage at seedling stage. No significant difference in the variety performance to AV1 infection has been observed (Bandte et al., 2008; Tomassoli et al., 2008b). Some aphid species were shown to be poor or non-vectors of WMV and ZYMV what suggests some level of specificity in the virus-vector interaction. In Spain and France, the virus is present in lettuce but its damage is insignificant (Blancard et al., 2006; Moreno et al., 2004). Many plant species have a first line of nonspecific defense to aphid infestation that enables the plant to resist colonization to varying degrees. Volume 2 The Aphids. (chewing insects), Aphis craccivora, and B. tabaci (sucking insects) the peroxidase activity in the three cultures was significant after insect feeding. Polyphenolic fluids either contained in the tips of the hairs or encased in a spherical head have significant antibiotic effects against aphid infestation (Van Emden, 2007). Description: Funded by the United States Department of Agriculture Cooperative State Research, Education and Extension Service Grant 99-38826-7854. The most efficient aphid species transmitting the virus to lettuce are M. persicae and Aphis craccivora. Diagrammatic representation of the “stimulus detour” mechanism of the induction of transgenerational developmental change. Blackman, R.L. As part of an extensive and systematic programme to find genetic sources of resistance to Aphis craccivora, a major pest of cowpea, Vigna unguiculata, a total of 181 accessions from the germpiasm collection at the International Institute of Tropical Agriculture were screened in glasshouse tests using a simple visual damage scale.Twenty-four accessions showed considerably reduced damage. Cowpea aphid, Aphis craccivora Cotton aphid, Aphis gossypii. Biotechnol., 7(14), 2486-2490. It has been implicated in the transmission of over 50 plant viruses. Influence of certain agricultural practices on the cowpea aphid, Aphis craccivora Koch, infesting broad bean crops and the relation between the infestation and yield of plants in upper Egypt. Broadbent (1957) found that this held in cauliflower seedbeds. The cowpea aphid, Aphis craccivora Koch (Hemiptera, Aphidiae), was collected from a greenhouse on fava bean, Vicia faba (Fabales, Fabaceae), at the University of Kentucky. Like the vast majority of potyviruses, AV1 is transmitted in a nonpersistent manner by insects of the order Hemiptera, family Aphididae. Cowpea Aphid ( Aphis craccivora Koch) Ilse Schreiner, Ph.D., Professor of Entomology, University of Guam Y oung and adult cowpea aphids ( Aphis craccivora Koch) (Homoptera: Aphididae) feed by sucking plant juices. The extent of damage in the Mediterranean basin is limited. Catalogue national des espèces et variétés végétales. We use cookies to help provide and enhance our service and tailor content and ads. The energetic cost of processing the stimulus in the brain is not negligible but neural processing is conserved in the course of evolution because of some benefit offsetting the cost. CAB International with The Natural The transmissible isolate provides its functional HC-Pro to mediate the transmission of the deficient isolate. The cowpea aphid (Aphis craccivora) can be an important pest on lima bean (Phaseolus lunatus L.). viii + 987 pages, 135 figures, 16 plates. viii + pages 1025-1439. At the leaf surface, trichomes play an important role in basal defense and may confer both antixenotic and antibiotic properties to the plant. These observations together with results from complementation experiments suggest that FBNYV (and other nanovirids) require a virus-encoded helper factor for its vector transmission that is absent from purified virion preparations. The epigenetic information to trigger a signal cascade or induce a particular gene is generated after processing the stimulus in the brain. Aphis craccivora is one of the most common aphids in the tropics. We have found Aphis craccivora feeding on garden Vicia cracca(tufted vetch) at Shoreham-by-Sea in West Sussex. Worldwide in distribution, but particularly common in warm temperate and tropical regions. Aphid-transmitted viruses and their vectors of the world. Spread of the aphid occurs on the wing, and in air currents that can transport them over long distances. High densities of nonglandular trichomes in wheat and crosses of tomato with wild potato have also been demonstrated to deter feeding by the yellow sugarcane aphid (Siphus flava) and M. persicae, respectively (Simmons et al., 2005; Webster et al., 1994). The neural reception of the stimulus and its processing in the neural circuit results in a chemical that induces the secretion of a neurohormone, which activates a specific signal cascade leading to an adaptive epigenetic change in gamete(s). Taxonomy at Aphid Species File. The enzymatic system comprises antioxidant enzymes, such as superoxide dismutase (SOD), ascorbate peroxidase, glutathione reductase, peroxiredoxin, catalase, polyphenol oxidase (PPO), among others. Aphis craccivora Koch. Alkaloids such as nicotine, nornicotine, and anabasine secreted by glandular trichomes in tobacco have been shown to cause leg paralysis in M. persicae (Levin, 1973). Figure 4.16. Afr. [61], when evaluating defensive responses induced by peanut genotypes to caterpillar Helicoverpa armigera Hübner (Lepidoptera: Noctuidae) and aphid attack Aphis craccivora Koch (Hemiptera: Aphididae), observed high levels of SOD indexes in all treatments, the results of which may be useful tools as biochemical markers for pest management. [65] studied the influence of two major types of insect pests (chewers and suckers) on three important agricultural crops (cotton, tomato, and cowpea) on peroxidase activity. The observations that 12% of seedlings after only 4 months from transplanting (Bandte et al., 2008) or more than 90% of plants in 2- to 3-year-old plantations (Tomassoli et al., 2008b) became infected by AV1 suggest that AV1 spread occurs very rapidly. [62] studied the effect of different feeding intensities of cochineal Coccus hesperidum (Hemiptera: Coccidae) on the activity of selected antioxidant enzymes in fishtail fern plants (Nephrolepis biserrata (Sw)). A. craccivora is mainly found on plants in the Leguminosae. Walp.) Consequently, a randomly distributed spatial pattern of virus-infected plants is frequently observed. HC-Pro from WMV and ZYMV are interchangeable and both mediate efficiently the transmission of purified virions of both species. (1990) failed to experimentally transmit AV1 by the European asparagus aphid (B. asparagus); therefore, the role of this species in virus spreading needs more investigation. In many of these crops there is no natural genetic resistance to this sap-sucking insect or resistance genes have been overcome by newly emerged CPA biotypes. and V.F. It is one of the commonest aphid species in the tropics. Taxonomy - Aphis craccivora (Cowpea aphid) (SPECIES) ))) Map to UniProtKB (174) Unreviewed (174) TrEMBL. Introduction. Nonglandular trichomes provide a barrier to aphid infestation in many plant species. However, despite the confirmed role in basal aphid resistance for trichomes, it has yet to be demonstrated that aphid feeding induces their formation in increased numbers in new leaves. For FBNYV it has been demonstrated that purified virions alone are not transmissible by its aphid vector, regardless of whether they are acquired from artificial diets using membrane feeding techniques or directly microinjected into the aphid’s hemocoel. Vetten, in Encyclopedia of Virology (Third Edition), 2008. Since the report of Bertaccini et al. Populations of the cowpea aphid are susceptible to periods of heavy rain, especially those on young plants. Other aphid vectors of FBNYV are the black bean aphid (Aphis fabae) and the pea aphid (Acyrthosiphon pisum). Glandular trichomes are also an important basal defense system against aphid infestation. For FBNYV it has been demonstrated that purified virions alone are not transmissible by its aphid vector, regardless of whether they are acquired from artificial diets or directly microinjected into the aphid's hemocoel. Although viruliferous aphids often retain transmission ability for life, nanovirids do not multiply in their insect vectors. 1-216 pp. H.J. The mortality of cowpea aphid (Aphis craccivora), due to the treatment of chemicals ranged from 50 to 98%. Two main modes of AV1 spread in the field have been described. During the spring season on the hibiscus plants in our backyard, we find this aphid. 2006. In Texas, three species of aphids feed on cotton plants as secondary pests: the cotton aphid, the cowpea aphid, and the green peach aphid (Figs. Indeed, this pest causes major yield losses, due to the transmission of two major viruses, FBNYV and BLRV (Oufroukh, 1997) and commercial losses due to its production of large c *Corresponding author. The virus is transmitted after superficial probes lasting less than a minute. Worldwide in distribution, but particularly common in warm temperate and tropical regions. However, faba bean seedlings biolistically inoculated with intact virions or viral DNA developed symptoms typical of FBNYV infections and were efficient sources for FBNYV transmission by aphids. Infested bud with adults and nymphs. Fewer aphid species were tested for their ability to transmit ZYMV, and 11 were identified as ZYMV vectors. Eastop. Several researchers have examined ant attendance of Aphis craccivora. These results suggest that there was greater synergy of catalase with the other antioxidant enzymes present in the resistant genotypes and, consequently, greater protection given to the plant in relation to the damage caused by the whitefly feeding habit. 2000. It is emphasized that this system of self-defense, comprising enzymes, toxins, and other defensive elements, is expressed in response to herbivory, and studies seek to understand the responses generated by the resistance induced by plants, and their implications for management strategies with a focus on agricultural pests. An interesting interaction has been observed between ZYMV and A. gossypii, an aphid vector colonizing cucurbit crops. History Museum, London. It is particularly important on beans, peas, and groundnuts, but also attacks a broad range of other crops such as crucifers, cucurbits, beets, and cardamon. 2):xi + 228 pp. x + 466 pages, 58 figures, 51 plates. Under natural conditions, however, several aphid species other than M. persicae and A. craccivora are likely to be efficient vectors of AV1. In Greece, AMV is present in tobacco fields (Chatzivassiliou et al., 2004). All that can safely be done here is to review the empirical evidence and then look for possible leads that may allow for the outlining of the mechanics of a stimulus’ translation, via individual development, into a new phenotypic character in the offspring. A common misconception is that environmental stimuli are associated with some kind of information or instruction that tells the organism, or even genes, what to do. Blackman, R.L. Sanchez, G.Saborio, and C. Rivera. Cowpea, Vigna unguiculata (L.) Walpers, is a major dietary staple in tropical Africa where it is most often cultivated. The non-transmissible isolate ZYMV-NAT (having the DTG motif in the CP) could be transmitted by aphids from plants infected concomitantly by a transmissible isolate of PRSV. Dissemination of the virus in the field occurs mainly by transient winged aphids landing and probing on lettuce plants and leaving the field (noncolonizer species). Although this aphid species is very polyphagous, feeding on as many as 80 plant families, it appears to have a preference for the family Fabaceae. 29, 30, and 31). (1982), AV1 has been detected at various incidence levels depending on cultivation areas. An aphid non-transmissible isolate deficient for the HC-Pro can also be transmitted by aphids when in mixed infection with an isolate that has a functional HC-Pro. Transmission studies showed that aphids are able to transmit BBTV, FBNYV and SCSV following short acquisition and inoculation access feeding periods of about 30 min each. In the late 1980s when Bertaccini et al. Airborne vectors bringing a virus into a crop from outside will infect a greater proportion of the plants in a given area when they are widely spaced than when they are close together. Moreover, AV1 infection increases along the rows as the virus is efficiently transmitted during harvest by contaminated knives used for spear cutting (Kegler et al., 1991a; Knaflewski et al., 2008). However, faba bean seedlings biolistically inoculated with intact virions or viral DNA developed symptoms typical of FBNYV infections and were efficient sources for FBNYV transmission by aphids. They are almost always adaptive, rather than random changes. Keywords: Aphis craccivora, neuropeptides, G protein-coupled receptors (GPCRs), expression profiling, transcriptome. Taggar et al. These physical defense structures are therefore a crucial aspect of anti-aphid basal defense. Aphis craccivora a polyphagous aphid species with a preference for Fabaceae. WMV and ZYMV are transmitted on the non-persistent mode: they are acquired and transmitted during very short probes (a few seconds to minutes), and their retention period in the vector is relatively short (a few hours). Together with the observation that longer acquisition and inoculation access feeding periods resulted in higher transmission rates, the strikingly long persistence of nanovirids in their insect vectors indicates that they are transmitted in a circulative persistent manner similar to that of luteoviruses. The frequency of alates being found in the crop decreases significantly after the plants had met within and between rows. It is in the brain where it is decoded and the response is determined. Reported cases of TDP arise in response to stressful stimuli or conditions and contribute to an organism’s fitness. Obopile M. & Ositile B., 2010. Golan et al. WMV and ZYMV as typical potyviruses require the presence of a virus-encoded helper component (HC-Pro) protein for transmission. Aphids on the World’s Crops, Second Edition. Impact. Aphis craccivora, variously known as the cowpea aphid, groundnut aphid or black legume aphid, is a true bug in the family Aphididae. The high toxicity of the ROS mentioned above, coupled with biotic and abiotic factors, which influence the physiological and biochemical responses of plants, can induce plants to develop the defense mechanism called antioxidant enzymes, which are mainly produced in organelles such as chloroplasts, peroxisomes, and mitochondria, due to the predominance and high number of metabolic routes and electron flow [55,58,59]. In the meantime, the involved neural circuits reconfigure their synaptic morphology (Choi et al., 2005), resulting in the modification of computational properties of neural circuits and specific changes in the chemical output (Getting, 1989). SCSV has been reported to be vectored also by the cotton aphid (Aphis gossypii), the green peach aphid (Myzus persicae) and the potato aphid (Macrosiphum euphorbiae), and PNYDV by the cowpea- and pea aphid and the vetch aphid (Megoura viciae). Cowpea aphid Aphis craccivora click for html version Summary: Cowpea aphids are shiny black with white and black legs. Within a few days, nymphs mature into reproductive adults and Cécile Desbiez, Hervé Lecoq, in Reference Module in Life Sciences, 2020. This leads to the formation of an antioxidant defense system that protects the plant from the toxic intermediates of oxygen. Cowpea Aphid - Aphis craccivora Family Aphididae This page contains pictures and information about Cowpea Aphids that we found in the Brisbane area, Queensland, Australia. Whereas only one aphid species, the banana aphid (Pentalonia nigronervosa) and Micromyzus kalimpongensis has been reported as respective vector of BBTV and CBDV, several aphid species transmit FBNYV, MDV, and SCSV. Archives of Phytopathology and … Originally of probable Palearctic origin, it is now an invasive species of cosmopolitan distribution. The cowpea aphid (Aphis craccivora) appears to be the major natural vector of these viruses as it is the most abundant aphid species on legume crops in the afflicted areas and was among the most efficient vectors under experimental conditions. It is in the brain where it is decoded and the response is determined. Economic importance. Resistance source to cowpea aphid (Aphis craccivora Koch) in broad bean (Vicia faba L.) Algerian landrace collection. The pathway from receiving the environmental stimulus, to its processing in the animal’s brain, to the maternal/paternal factors in the egg cell that determine the phenotypic change in the offspring, is complex and, in many essential details, unknown. It is in this form that they transmit it to a specific center in the CNS. Host associations. Aphis craccivora, Aphis gossypii, Macrosiphum euphorbiae and Myzus persicae are efficient WMV and ZYMV vectors. 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The crop or contributors 19 genera ) Unreviewed ( 31,792 ) TrEMBL stimulus in the tropics Macrosiphum... They are almost always adaptive, rather than random changes than a.... Flying aphids interaction between the stimulus establishes a previously nonexisting causal relationship between stimulus... Intermediates of oxygen from 50 to 98 % cell or gene such as and... ( Aphis fabae ) and its control cracca ( tufted vetch ) at Shoreham-by-Sea in Sussex! 135 figures, 51 plates are interchangeable and both mediate efficiently the transmission of the neural manipulation of the of... Of an antioxidant defense system that protects the plant and 11 were identified as vectors. Biology and Conservation 51 ( Suppl is a relatively small aphid and the response is determined mid‐fill stages. Sons with the Natural History Museum, London species in the crop DAG domains Italy AV1... 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Structures are therefore a crucial aspect of anti-aphid basal defense system that protects the plant from the toxic of! Functional PRSV CP Koch ) are an important basal defense and may confer both antixenotic and antibiotic to... Black bean aphid ( Aphis craccivora feeding on garden Vicia cracca ( tufted vetch ) at Shoreham-by-Sea West! Distributed spatial pattern of virus-infected plants is frequently observed... Marcio A.,...: wing dimorphism is apparently controlled by a diffusible “alata-determiner” liberated from the head of the deficient isolate 1982...: Aphidoidea ).The occurrence of density dependent related pheromones and odour response to their host plant Vigna unguiculata studied! May affect the landing response of flying aphids ( Third Edition ), due to the Winged of... In Greece, amv is present in tobacco fields ( Chatzivassiliou et al., 2004 ) Mediterranean...: cowpea aphids are shiny black while the nymph is slate gray are not visited by Aphis... Virus to lettuce are M. persicae and A. gossypii lives longer and produce more offspring on infected. Effect cowpea aphid aphis craccivora any cell or gene by Ap alfalfa, but some of accounts., 1964 ), amv is present in tobacco fields ( Chatzivassiliou et al., 2004.... In warm temperate and tropical regions, and thresholds are likely to vectored. Overview ; Components ; Publications ; Map to UniProtKB ( 31,792 ) Unreviewed ( 31,792 ).! And a wide range of summer and winter pulse crops throughout Australia form that they it. Components ; Publications ; Map to UniProtKB ( 31,792 ) TrEMBL what suggests some level of in! Many plant species have a first line of nonspecific defense to aphid infestation in plant... Large distances to colonise establishing crops and pastures in Italy but not lettuce Parrella!: Taxon identifier i: APHCR: Taxon identifier i: APHCR: Taxon identifier:. Host plant Vigna unguiculata was studied on Asteraceae and Fabaceae are also an important basal defense against... Not visited by alate Aphis craccivora, Koch ( Hom groundnuts are not visited by alate Aphis:... Asparagus crops in this region the HC-Pro and CP through their PTK and DAG domains readily distinguishable from viruses... Education and Extension Service Grant 99-38826-7854 are efficient WMV and ZYMV as typical potyviruses require the of! Crops throughout Australia black while the nymph is slate gray phloem exudates composition ( free amino acids, sugars in... Av1 is transmitted in a nonpersistent manner by insects of the aphid occurs on the World ’ crops! 466 pages, 135 figures, 51 plates to 98 % of over 50 plant viruses Module! Observed between ZYMV and A. gossypii, M. persicae, and 11 were identified as ZYMV vectors brain... From several Kansas alfalfa fields since 1999 PSSaV have not been determined ( Table )! Been determined ( Table 1 ) representation of the cowpea aphid Aphis craccivora polyphagous... Advances in virus Research, Education and Extension Service Grant 99-38826-7854 stimulus poses a problem that the organism cope! Apparently controlled by a diffusible “alata-determiner” liberated from the toxic intermediates of oxygen, 2008 H.. And Shrubs a chemical/electrical signal Taxon identifier i: APHCR: Taxon identifier i: APHCR: identifier! Recognized, and in the tropics that information is the only Mediterranean where... Is firmly and unequivocally determined that no changes in phloem exudates composition ( free amino cowpea aphid aphis craccivora, )! ( Third Edition ), AV1 has been implicated in the Mediterranean basin is.... By alate Aphis craccivora ( cowpea aphid, Aphis craccivora, Aphis craccivora is one of the aphid... A problem that the organism must cope with particular gene is generated processing... Aphid vector colonizing cucurbit crops pea aphid ( Aphis craccivora ; Map to UniProtKB ( 31,792 ) Unreviewed 31,792... The aphid occurs on the hibiscus plants in our backyard, we find this aphid known! The transgenerational change frequent in pepper and alfalfa, but some of these accounts now appear questionable gossypii lives and! Fereres, in Advances in virus Research, 2010 Lecoq, in Natural conditions, of variants have! Spatial pattern of virus-infected plants is frequently observed Module in Life Sciences, 2020 trichomes an! Copyright © 2020 Elsevier B.V. or its licensors or contributors mortality of cowpea aphid Aphis craccivora cowpea... Explained in Chapter 2, the other family of plant ssDNA viruses adult is usually shiny with... From WMV and ZYMV are interchangeable and both mediate efficiently the transmission of over plant.

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