Okra Yellow Vein Mosaic Virus

Among the sucking pests whitefly Bemisia tabaci Gennadius causes economic dew that causes sooty mould formation 23. Kulkarni 1924 was the man who first reported this disease in our country and further studies were extended by Uppal et al.

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It is characterized by different degrees of chlorosis and yellowing of veins and veinlets Fig1 smaller leaves fewer and smaller fruits and stunting Venkataravanappa et al 2012.

Okra yellow vein mosaic virus. Okra with mosaic virus of this type first develops a mottled appearance on the leaves that is diffuse. Symptoms The main symptom of this disease is a homogenous interwoven network of yellow veins. Enzyme-linked immunosorbent assay ELISA detected Okra mosaic virus OkMV and Okra yellow vein mosaic viru s OYVMV in symptomatic leaves of the ten cultivars.

Symptoms of Okra Yellow mosaic virus 1. Okra mosaic disease was the most frequently detected in cultivar Adom while okra yellow vein mosaic disease was most abundant in cultivar Labadi dwarf. The most common okra leaf disease is yellow vein mosaic virus disease.

As the plant grows the leaves start to get interveinal yellow coloring. The key sucking pests of okra are whiteflies aphids jassids thrips and mites. Is caused by YVMV and subsequently named as yellow vein mosaic of okra Uppal et al 1940.

This viral disease of Okra may cause significant yield losses. Identification and detailed molecular characterization of associated. 6210 Radish Leaf curl disease in radish was fi rst observed.

Okra Diseases and their Control. Occurrence of yellow veins and mosaic patterns on the leaves. The association of betasatellite has been found in India in fi eld con-dition Chatterjee and Ghosh 2007There was an association of cotton leaf curl betasatellite with MeYVMV.

Okra Yellow Vein Mosaic Virus OYVMV disease which is transmitted by whitefly Bemisia tabaci Gen is the most devastating disease in okra cultivation in the world as well as in Sri Lanka. This disease is transmitted by whitefly. This virus is known to be transmitted by whiteflies.

It has been estimated that if plants are infected within 34-35. 22 studied the genetics of yellow vein mosaic virus resistance in okra based on 9 generations derived from crosses involving resistant and susceptible cultivars. Yellow vein mosaic virus.

The okra essential for systemic movement and symptom expression yellow vein mosaic virus OYVMV disease is Brown and Nelson 1988 Nouiry et al 1994. The YVMD was first reported in 1924 from India. It was first found in 1924 in Bombay India and Sri Lanka.

The yellow vein mosaic virus YVMV is one of the most serious diseases in okra production often causing severe losses in commercial fields. Identifying and deploying resistant genotypes and understanding the inheritance of YVMV disease resistance are essential for the okra geneticists to develop an effective breeding strategy. Harender et al 1993 Nath et al 1993 Sastry and Singh 1975.

The vein is clearing and veinal chlorosis occurs. Crops in recent years. Bhendi yellow vein mosaic virus BYVMV or okra yellow vein mosaic OYVMV is a viral disease caused by monopartite Begomovirus affecting okra plants.

It occurs at all crop stages and is transmitted by whiteflies Bemisia tabaci. Besides causing direct damage it also transmits an economically important viral disease caused by Okra yellow vein mosaic virus OYVMV. It is the major limitation of the production of okra.

Its symptoms are interwoven network of yellow veins encompassing with islands of green tissues in leaves. Strains with no known vectors have infected plants in Africa but it is yellow vein mosaic virus that has been seen in US. OYVMV characteristically have circular single-stranded DNA genomes.

Mesta yellow vein mosaic virus and mesta yellow vein mosaic Bahraich virus are affecting in India. Characterized by a homogenous interwoven network of yellow vein enclosing islands of green tissue within its Recently certain monopartite Begomoviruses leaf. It can ef fi ciently transmit up to 85 in H.

Yellow vein mosaic disease is the major biotic constraint of okra cultivation in Sri Lanka. The leaves vein and veinlets are conspicuous yellowing and they become thick. Fruit yield may be reduced to a maximum of 96 if the crop is infected in an early stage.

Later entire leaves turn yellow. Distortion of leaf stalks and stems occurs at. Yellow vein mosaic disease of Okra Bhindi is the commonest one of this vegetable in India and most probably is restricted to countries of South Asia.

Arka anamika and Arka Abhag were the most suitable yellow vein mosaic virus resistant okra for commercial cultivation. This disease is vectored by an insect white fly Bemisia tabaci Genn. In severe cases the leaves become completely yellow.

Yellow Vein Mosaic Disease YVMD caused by the Okra Yellow Vein Mosaic Virus OYVMV is the most serious constraints in the production of okra Farnendo and Udurawana 1942. The growth of the plant becomes affected and they remain stunted. Infection of 100 plants in a field is quite usual with yield loss.

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