Effect of Okra Yellow Vein Mosaic Virus (OYVMV) on Plant Growth and Yield

Abstract

Okra yellow vein mosaic virus (OYVMV) is one of the most destructive diseases of okra plant. In the current study, effect of okra yellow vein mosaic virus (OYVMV) was assessed on plant growth and yield in naturally infected crop under agro-ecological conditions of Hyderabad district. The virus showed the significant reduction in plant height, number of leaves, flowers, fruits, and over all pickings and yield of all the locations wherever the crop was examined in the district. The significant reduction in plant height (48.67 cm) in infected plants as compared to healthy plants (62.96 cm) was recorded. Similarly, significant difference in the flowers formation per plant at all four locations was recorded in diseased (0.912) and healthy (2.165) plants. Fruit weight was also significantly reducing due to the disease prevalence at all four locations (73.25 g) as compared to healthy observed fruits (91.50 g). Interestingly, on overall basis there were more numbers of leaves (20.66) in infected plants as compared to healthy one (16.33). It is obvious from the results that virus (OYVMV) showed significant increase in number of leaves but reduced plant height, flowers, fruits and yield at all four observed locations, thus, pathologists and breeders are advised to work more on evaluation of resistant varieties using advanced molecular tools. The growers are also advised to adopt preventive as well as curative control measures so that the yield losses may be decreased.

Differential Biotic and Abiotic Induced Stress Levels Confer Varying Morphological Responses in Okra (Abelmoschus esculentus L. Moench) Cultivars

“…Again results in this work showed percentage reduction was high in that Rafiki and Indiana but low in Essoumtem, indicating a possible tolerance to both virus and drought combination stress. This was in line with the findings of Khaskheli et al 22 , who reported a significant reduction in plant height of okra grown in four different locations and infected with the yellow vein mosaic virus as compared to healthy plants. Amiteye et al 23 also reported that plant height was significantly reduced in diseased plants of all ten okra cultivars infected with the okra mosaic virus (OkMV).…”

Screening of Okra Varieties for Resistance to Okra Yellow Vein Mosaic Disease under Field Conditions

“…The virus poses a serious threat to okra cultivation worldwide including in Sindh, Pakistan owing to its long-term survival in the insect vector, highly efficient transmission through the insect vector and overlap cropping. In the Hyderabad district, Sindh-Pakistan, the BYVMV significantly reduces all plant growth and yield parameters under natural infection conditions (Khaskheli et al, 2017). Kumbhar (2017) concluded from his survey study that OYVMD prevails in districts of Hyderabad, Tando Allahyar, Matiari, and Sanghar (Sindh-Pakistan) with high incidence and severity.…”

Studies on inheritance of yellow vein mosaic virus (YVMV) resistance in okra (Abelmoschus esculentus L.) cv. Pusa Bhindi-5 and effect of YVMV disease on fruit nutritional quality

“…However, in general, Zn and Cu-deficient plants are highly susceptible to plant diseases (Grewal et al 1996 in wheat andHelfenstein et al, 2015 in soybean) as these minerals protect plants against pest and disease infestations (Marschner, 1995). Khaskheli et al (2017) reported that the yellow vein mosaic virus significantly reduced plant height, number of leaves, flowers, fruits, and overall pickings and yield of okra. Most resistant genotypes were reported to be very poor in yield and fruit quality (Nizar et al 2004).…”