Incidence of apical leaf curl disease (ToLCNDV), and economics and reaction of potato (Solanum tuberosum) cultivars against whitefly, Bemisia tabaci in northern India

Bhatnagar, Anuj; Pant, RP; Sridhar, J.; Chakrabarti, Swarup K.; Lal, Murari

doi:10.56093/ijas.v87i12.76513

Cited by 6 publications

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References 2 publications

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“…They found that three sprays of insecticide could reduce the incidence of B. tabaci in K. Bahar and K. Khyati, K. Pukhraj and K. Chipsona-1. The population of whitefly varied in both years in potato cultivars [36].…”

Section: Monitoring Of Sucking Insect Pests In Unsprayed Cropmentioning

confidence: 99%

Selection of Potato Apical Leaf Curl Virus Disease-Resistant Genotypes, Pest Surveillance, Seed Degeneration, and Management of Aphid in Field Conditions

2022

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Objectives: Under All India Co-ordinated Research Project on Potato, studies on the selection of potato apical leaf curl virus disease-resistant genotypes, pest surveillance, seed degeneration, and management of aphid in field conditions were conducted at Hisar during 2017–2018. Methods: Sowing of seed tubers was done at recommended time and spacing in every experiment followed by spraying of required insecticides. Observations on different aspects were recorded and statistically analyzed to present results in tabular format. Results and Discussion: Out of 100 germplasm, seven were resistant and one was moderately resistant to potato apical leaf curl New Delhi virus, all the local genotypes were susceptible to disease. There was infestation of aphids, jassids, thrips, and whitefly irrespective of cultivars. Severe mosaic incidence ranged from 63.6 to 93.2%. The breeder seed was superior as it resulted in the highest seed tuber emergence (98.94%) and the least incidence of leafroll disease (0.80%) followed by seed tuber of seed plot technique (SPT). The conventional seed performed the poorest in terms of emergence and exhibited the highest disease incidence. Aphid appeared in the 47th meteorological week and it approached the ET level in the 52nd week. Whitefly population was the highest in the 47th week which continuously declined. Jassid population was very mild and thrips appeared in the 52nd week. Flonicamid 50 WG caused higher aphid mortality than imidacloprid after 24 h of spray. The maximum and minimum temperatures varied from 16.9 to 35.7 and 2.6 to 16.2° C, respectively. The morning and evening relative humidity was in the range of 82–100 and 24–75%, respectively. The wind speed ranged from 1.0 to 3.6 KMPH and the sun was shined from 0.3 to 7.6 h. The results of this study are close conformity of earlier researchers. Conclusion: It is concluded that resistant genotypes, breeder seed, and seed produced through SPT are promising in managing the disease successfully. Flonicamid is a good alternative of imidacloprid. Aphid is a major pest that plays a key role in transmitting viral disease of this crop, its population touched ET level in the 52nd week.

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Section: Monitoring Of Sucking Insect Pests In Unsprayed Cropmentioning

confidence: 99%

Selection of Potato Apical Leaf Curl Virus Disease-Resistant Genotypes, Pest Surveillance, Seed Degeneration, and Management of Aphid in Field Conditions

2022

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Tomato leaf curl New Delhi virus (Tomato New Delhi virus)

Gómez¹,

Juárez²

2022

CABI Compendium

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Begomoviruses affecting pulse and vegetable crops are unevenly distributed in distinct agroecological zones of the eastern India

Sahu

Dokka

Mahajan

et al. 2021

Journal of Phytopathology

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Intensive cultivation, climate change and host–pathogen dynamics/interaction had led to emergence of viral diseases and vector population, thereby causing significant economic losses. In the present study, extensive surveys were conducted (during 2016–2017) followed with field experiments (2017 and 2019 kharif and 2018 rabi seasons) in the state of Chhattisgarh, India, comprising of three diverse agroecological zones, viz., northern hill zone, central plain zone and southern Bastar plateau zone, for understanding the distribution pattern of viruses and vector populations in prominent pulses and vegetable crops. Field experiments revealed that more than 90% incidence of yellow mosaic disease (YMD) was recorded in mungbean and urdbean, followed by YMD of ridge gourd and bitter gourd, leaf curl disease of tomato (ToLCD) and chilli and yellow vein mosaic disease of bhendi; however, only five per cent YMD was recorded in cow pea. Molecular and sequence analysis of viral genomic components revealed ToLCD in central plain zone of Chhattisgarh was caused by a consortium of begomoviruses, including Tomato leaf curl New Delhi virus (ToLCNDV), Tomato leaf curl Karnataka virus (ToLCKV), and Tomato leaf curl Kerala virus associated with satellite molecules. YMD of mungbean, cow pea and soybean was caused by Mungbean yellow mosaic India virus (MYMIV), while YMD of ridge gourd was caused by ToLCNDV. PCR analysis, using species‐specific primers, of samples representing the three different regions revealed that YMD of mungbean, urdbean and cowpea was positive only for MYMIV and was unevenly distributed, while YMD of ridge gourd, bitter gourd, pumpkin and sponge gourd was positive only for ToLCNDV; however, ToLCD was positive for either ToLCNDV or ToLCKV or both, and some samples were also found associated with betasatellite molecules. Amaranthus and rice bean were identified as non‐host species for the begomoviruses infecting tomato and MYMIV, as observed by surveys in the hot‐spot‐like areas, controlled whitefly transmission as well as agroinoculation. Compilation and analysis of available information on begomoviruses affecting these crops in India suggest that they are unevenly distributed in India. This is the first report of the begomovirus occurrence in pulses and vegetable crops in this agroecologically diverse region.

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Incidence of apical leaf curl disease (ToLCNDV), and economics and reaction of potato (Solanum tuberosum) cultivars against whitefly, Bemisia tabaci in northern India

Cited by 6 publications

References 2 publications

Selection of Potato Apical Leaf Curl Virus Disease-Resistant Genotypes, Pest Surveillance, Seed Degeneration, and Management of Aphid in Field Conditions

Selection of Potato Apical Leaf Curl Virus Disease-Resistant Genotypes, Pest Surveillance, Seed Degeneration, and Management of Aphid in Field Conditions

Tomato leaf curl New Delhi virus (Tomato New Delhi virus)

Begomoviruses affecting pulse and vegetable crops are unevenly distributed in distinct agroecological zones of the eastern India

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