scholarly journals Implications of aphid flight patterns for pest management of potatoes

2000 ◽  
Vol 53 ◽  
pp. 78-82 ◽  
Author(s):  
M.A.W. Stufkens ◽  
D.A.J. Teulon ◽  
D. Nicol ◽  
J.D. Fletcher
Keyword(s):  
Pest Management ◽  
Leaf Roll ◽  
Potato Leaf Roll Virus ◽  
Management Decisions ◽  
Potato Leaf ◽  
Aphid Vectors ◽  
Forecasting System ◽  
Suction Trap ◽  
Potato Crops ◽  
High Suction

The flight patterns of aphid vectors of the potato leaf roll virus were monitored for 18 years with a 75 m high suction trap at Lincoln Canterbury Analysis of the collected samples indicates that latespring and autumn aphid flight peaks vary considerably between seasons and years in their timing magnitude and duration which may have important implications for aphid and virus control in potato crops The potential of a virus forecasting system based on aphid flight monitoring to support potato growers pest management decisions is discussed

scholarly journals In silico Characterization and Homology Modelling of Potato Leaf Roll Virus (PLRV) Coat Protein

2019 ◽  
pp. 1-8
Author(s):  
Jitesh Kumar ◽  
Tushar Ranjan ◽  
Ravi Ranjan Kumar ◽  
Mohammad Ansar ◽  
Kumari Rajani ◽  
...  
Keyword(s):  
Coat Protein ◽  
Potato Virus ◽  
Homology Modelling ◽  
Leaf Roll ◽  
Potato Leaf Roll Virus ◽  
Z Score ◽  
Ramachandran Plot ◽  
Potato Leaf ◽  
Potato Virus S ◽  
Potato Crops

Polerovirus (Family-Luteoviridae) are one of the most destructive viruses causing detrimental diseases in vegetable crops in tropical regions of the world including India. Four species viz. potato leaf roll virus (PLRV), potato virus Y(PVY), potato virus X(PVX) and potato virus S(PVS) are known to cause different diseases in potato crops. Of the various viral diseases inflicting potato crops, potato leaf roll disease is the most destructive and widely distributed. They cause huge agro-economical losses (90%) worldwide and thus are the subjects of immense concern. PLRV is a phloem-limited spherical virus transmitted by several aphid species in a persistent manner. A study was performed in order to detect the infection of potato leaf roll virus from different regions of Bihar. These infected samples were diagnosed first using DAS-ELISA for the PLRV infection and later, coat protein was amplified and sequenced from PLRV positive sample. Phylogenetic tree deduced based on the nucleotide sequence of the coat protein gene gene showed a distinct divergence of PLRV isolates in two major clades. The molecular weight of the predicted protein sequence of 203 amino acids was found 22617.06 daltons while theoretical pI was 5.22. The extinction coefficient of predicted coat protein was 0.836. An attempt was taken in order to illustrate the 3D model of the coat protein which was further verified using Ramachandran plot. The model structure obtained using Swiss-Model had 92.9% residues in the most favourable region of the Ramachandran plot (Fig. 3c) and showed Z-score for bond angles, chi-1/chi-2 correlation and Ramachandran Z-score were 1.457, 1.773 and -2.633 respectively which exhibited  considerably good model quality.

scholarly journals Lack of relationship between aphid virus vector activity and potato leaf roll virus incidence

2001 ◽  
Vol 54 ◽  
pp. 229-234 ◽  
Author(s):  
D.A.J. Teulon ◽  
M.A.W. Stufkens
Keyword(s):  
Seed Potato ◽  
Leaf Roll ◽  
Correlation Coefficients ◽  
Virus Vector ◽  
Potato Leaf Roll Virus ◽  
Potato Leaf ◽  
Virus Incidence ◽  
Vector Activity ◽  
Seed Crops ◽  
Potato Crops

The relationship between activity of aphid virus vectors and incidence of potato leaf roll virus (PLRV) in seed potato crops was investigated using historical data Numbers of PRLV aphid vectors (mainly green peach aphids) caught in a 75 m suction trap at Lincoln Canterbury and the incidence of primary and secondary PLRV for Ilam Hardy seed crops from the PT seed potato certification scheme in Canterbury were collated from 1982 to 2000 The degree of simple linear relatedness between aphid flight activity and virus incidence was examined Climate variables which may have contributed to aphid survival reproduction and movement in potato crops were also investigated Very low correlation coefficients between all variables tested were obtained Explanations for the lack of any relationship between potato aphid virus vector flights and virus incidence in potatoes are discussed

Examination of an isolate of Potato leaf roll virus that does not induce visible symptoms in the greenhouse

2016 ◽  
Vol 145 (4) ◽  
pp. 829-845 ◽  
Author(s):  
Anja Hühnlein ◽  
Jörg Schubert ◽  
Volker Zahn ◽  
Thomas Thieme
Keyword(s):  
Leaf Roll ◽  
Potato Leaf Roll Virus ◽  
Potato Leaf

scholarly journals Diversité et abondance des pucerons [Homoptera : Aphididae] et leur impact sur la dissémination des virus infectant la pomme de terre au Mali

2014 ◽  
Vol 94 (1) ◽  
pp. 1-7
Author(s):  
Almouner A.A. Yattara ◽  
Amadou K. Coulibaly ◽  
Frédéric Francis
Keyword(s):  
Potato Virus ◽  
Myzus Persicae ◽  
Aphis Gossypii ◽  
Leaf Roll ◽  
Potato Leaf Roll Virus ◽  
Potato Leaf ◽  
Pomme De Terre

Des études sur l’abondance et la diversité des pucerons ont été menées pendant trois campagnes agricoles au Mali. Sur la base de relevés de bacs jaunes installés dans des cultures de pomme de terre à Kati et à Sikasso, 2 525 pucerons ont été capturés et identifiés. Dix-neuf espèces de pucerons ont été recensées, dont deux qui ont été observéesin situsur la culture :Aphis gossypii(Glover) etMyzus persicae(Sulzer). La plupart de ces espèces sont des ravageurs de cultures et elles contribuent également à la transmission virale. Des échantillons foliaires prélevés dans des parcelles de pomme de terre dans les deux régions ont été testés par la technique ELISA pour la détection des deux principaux virus dommageables, soit lePotato VirusY (PVY) et lePotato Leaf Roll Virus(PLRV). Le taux de plantes virosées dans les deux localités pendant les trois années variait de 19,3 % à 21,8 % pour le PVY, alors qu’il était de 8,5 % à 9,3 % pour le PLRV. L’occurrence de ces maladies virales s’est révélée être très homogène d’une année à l’autre, avec des taux relativement importants. Cette étude est une première quantification dans cette région du Mali de l’importance des relations pucerons vecteurs–virus en culture de pomme de terre.

Biodiversity and full genome sequence of potato viruses Alfalfa mosaic virus and potato leaf roll virus in Egypt

2018 ◽  
Vol 73 (11-12) ◽  
pp. 423-438 ◽  
Author(s):  
Engy E. Abdel Aleem ◽  
Radwa M. Taha ◽  
Faiza A. Fattouh
Keyword(s):  
Phylogenetic Analysis ◽  
Nucleotide Sequence ◽  
Mosaic Virus ◽  
Complete Nucleotide Sequence ◽  
Leaf Roll ◽  
Alfalfa Mosaic Virus ◽  
Potato Leaf Roll Virus ◽  
Rt Pcr ◽  
Potato Leaf ◽  
Potato Viruses

Abstract Solanum tuberosum (potato) is the second most important vegetable crop in Egypt. It is locally consumed, manufactured or supplied for export to Europe and other Arab countries. Potato is subject to infection by a number of plant viruses, which affect its yield and quality. Potato virus Y (PVY), potato leaf roll virus (PLRV), and Alfalfa mosaic virus (AMV) were detected in major potato-growing areas surveyed. Multiplex-RT-PCR assay was used for the detection of these three viruses in one reaction using three specific primer pairs designed to amplify genomic parts of each virus (1594 bp for PLRV, 795 bp for AMV, 801 bp for PVY). All three viruses were detected in a single reaction mixture in naturally infected field-grown potatoes. Multiplex RT-PCR improved sensitivity necessary for the early detection of infection. Incidence of single, double, or triple infection has been recorded in some locations. Full-length sequencing has been performed for an Egyptian FER isolate of PLRV. Through phylogenetic analysis, it was shown to occupy the same clade with isolate JokerMV10 from Germany. Complete nucleotide sequence of an Egyptian FER isolate of AMV and phylogenetic analysis was also performed; we propose that it is a new distinct strain of AMV belonging to a new subgroup IIC. This is the first complete nucleotide sequence of an Egyptian isolate of AMV. Genetic biodiversity of devastating potato viruses necessitates continuous monitoring of new genetic variants of such viruses.

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