EVALUATION OF ORGANIC AMENDMENTS AND INSECTICIDES AGAINST  OKRA YELLOW VEIN MOSAIC VIRUS AND ITS VECTOR

Okra (Abelmoschus esculentus L.) is susceptible to number of diseases like Yellow Vein Mosaic Virus disease, Damping Off, Fusarium wilt, Powdery Mildew and Enation Leaf Curl. The Okra is favorite host of whitefly which transmits the okra Yellow Vein Mosaic Virus (OYVMV). OYVMV disease causes considerable yield losses in Okra. Experiment was conducted to check the efficacy of organic matter (poultry manure, leaves) and insecticides (Acetamiprid, Diafenthiuron, Pyridine Carboxamide) against OYVMV and its whitefly vector. In this experiment, ten okra varieties were sown in randomized complete block design (RCBD). Organic matter and insecticides were applied at recommended doses (@5ml/L) on weekly intervals. Among insecticides, Acetamiprid showed the best result to manage whitefly infestation with 60.01% mortality and OYVMV disease severity with 53.98% efficiency. Polo (Diafenthiuron) also showed good results to manage whitefly (56.36%) and OYVMVD (46.34%), but Ulala (Pyridine Carboxamide) insecticide was least effective to control whitefly population (47.27%) and to manage the infection of OYVMV disease (43.91%). Leaf manure was more effective with 61.16% efficiency as compared to poultry manure (56.01%) against OYVMV disease severity. New chemistry insecticide (acetamiprid) gave the most effective control of whitefly and transmission of OYVMV and could be used in place of conventional insecticides. Leaf manure proved significant defense activator in okra plants with effective control of disease and could be used as eco-friendly management approach.

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Genetic analysis of Okra Yellow Vein Mosaic Virus disease resistance in wild relative of okra Abelmoschus angulosus Wall. ex Wight & Arn

Plant Genetic Resources ◽

10.1017/s1479262119000078 ◽

2019 ◽

Vol 17 (04) ◽

pp. 346-351

Author(s):

SamanthiKumari Wasala ◽

Sumudu I. Senevirathne ◽

Jayantha Bandara Senanayake ◽

Anuradini Navoditha

Keyword(s):

Disease Resistance ◽

Mosaic Virus ◽

Disease Severity ◽

Virus Disease ◽

Disease Incidence ◽

Severity Index ◽

Yellow Vein ◽

Wild Relative ◽

Yellow Vein Mosaic Virus ◽

Progress Curve

AbstractWild relative of okra, Abelmoschus angulosus Wall. ex Wight & Arn. was identified as a resistant germplasm for Okra Yellow Vein Mosaic Virus (OYVMV) which is the devastating disease for okra cultivation in Sri Lanka. The mode of resistance of OYVMV in A. angulosus was studied with the aim of tagging responsible genes for the disease resistance. Wide hybridization was performed between A. angulosus and highly virus susceptible A. esculentus variety, MI-7. Very poor seed setting was observed in F1 and F2 generations due to post zygotic abortion. Disease screening was carried out using F1 and F2:3 populations along with parents in the field under induced disease pressure. Disease severity index and area under disease progress curve were calculated to measure disease severity. Number of genes segregating for OYVMV disease resistance was calculated for the F2:3 generation. Modified Wright's formula was used to estimate the effective gene number and mode of inheritance by a quantitative method. A χ2 test was performed for qualitative analysis. Plants of A. angulosus were totally free of virus incidence while 100% disease incidence was observed in the variety MI-7. F2:3 population showed between and within progeny segregation for disease incidence. Results indicated that the disease susceptibility was dominant over resistance. χ2 analysis revealed that the segregation of disease severity was significantly fit to the gene model of 9:6:1 (χ2 = 0.1757 at P ≤ 0.05) suggesting the disease resistance in A. angulosus is governing by two recessive genes in an additive manner. Result was confirmed by the quantitative analysis.

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Evidence of Economic Heterosis and Genetic Control of Fruit Yield and Yellow Vein Mosaic Virus Disease Severity Traits of Okra

Vegetos- An International Journal of Plant Research ◽

10.5958/2229-4473.2016.00091.4 ◽

2016 ◽

Vol 29 (3) ◽

pp. 46 ◽

Cited By ~ 3

Author(s):

Tania Seth ◽

Arup Chattopadhyay ◽

Subrata Dutta ◽

Pranab Hazra ◽

Bijendra Singh

Keyword(s):

Mosaic Virus ◽

Genetic Control ◽

Disease Severity ◽

Virus Disease ◽

Fruit Yield ◽

Yellow Vein ◽

Yellow Vein Mosaic Virus

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Weather based prediction models for whitefly Bemisia tabaci and Okra yellow vein mosaic virus disease in Okra

Indian Journal of Entomology ◽

10.5958/0974-8172.2019.00108.1 ◽

2019 ◽

Vol 81 (3) ◽

pp. 501

Author(s):

K. P. Manju ◽

K. Vijaya Lakshmi ◽

B. Sarath Babu ◽

K. Anitha

Keyword(s):

Mosaic Virus ◽

Bemisia Tabaci ◽

Prediction Models ◽

Virus Disease ◽

Yellow Vein ◽

Yellow Vein Mosaic Virus

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Assessment of Selected Yellow Vein Mosaic Virus Resistant Varieties of Okra in Rabi Season of Chatra District in Jharkhand, India

Current Journal of Applied Science and Technology ◽

10.9734/cjast/2020/v39i1630743 ◽

2020 ◽

pp. 112-115

Author(s):

Dharma Oraon ◽

Anjani Kumar ◽

Ranjay Kumar Singh ◽

U. K. Singh ◽

Zunaid Alam

Keyword(s):

Mosaic Virus ◽

Block Design ◽

Yellow Vein ◽

Cost Ratio ◽

Local Market ◽

Net Income ◽

Resistance Level ◽

Benefit Cost Ratio ◽

Yellow Vein Mosaic Virus ◽

Randomized Block Design

An On-Farm Trial (OFT) was conducted in the year 2016-17 and 2017-18 to assess the resistance level of different okra varieties against yellow vein mosaic virus in Kharif season of Chatra district of Jharkhand. The experiment was conducted in vegetable growing village Gidhour in Gidhour block of Chatra district in Jharkhand. The trial was designed in randomized block design consisting of 20 replications with three technological option i.e. TO-I Arka Abhay (N100P60K50), TO-II Arka Anamika (N100P60K50) and-III Pusa Makhmali (N100P60K50). For assessment related to yellow vein mosaic, percentage infestation in 5sqm and yield q/ha and economic was considered. The lowest infestation of yellow vein mosaic virus was observed in Pusa Makhmali variety i.e. (3.8%) with yield of 132.5 q/ha. It was also found superior in terms of Gross Income, Net Income and Benefit: Cost Ratio followed by Arka Anamika and Arka Abhay, respectively. Farmers’ response was also positive in all respects except the availability of varieties in local market.

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