scholarly journals Identification of Begomoviruses from Three Cryptic Species of Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) in Nepal

Agronomy ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2032
Author(s):  
Rajendra Acharya ◽  
Yam Kumar Shrestha ◽  
Mst Fatema Khatun ◽  
Kyeong-Yeoll Lee
Keyword(s):  
Cryptic Species ◽  
Bemisia Tabaci ◽  
Management Strategies ◽  
Plant Viruses ◽  
Tomato Leaf ◽  
Begomovirus Species ◽  
Tomato Leaf Curl ◽  
Leaf Curl Virus ◽  
Asia Ii 1 ◽  
Leaf Curl

The Bemisia tabaci species complex consists of at least 44 cryptic species, which are potential vectors of approximately 320 begomovirus species, most of which are significant plant viruses. However, the relationship of begomovirus transmission through vectors at the cryptic species level is uncertain. In our previous study, three cryptic species (Asia I, Asia II 1, and Asia II 5) of B. tabaci were identified from 76 B. tabaci samples collected across 23 districts in Nepal. Using the same individuals we identified seven different begomovirus species (Squash leaf curl China virus [SLCCNV], Tomato leaf curl New Delhi virus [ToLCNDV], Okra enation leaf curl virus [OELCuV], Synedrella leaf curl virus [SyLCV], Tomato leaf curl Kerala virus [ToLCKeV], Ageratum enation virus [AEV], and Tomato leaf curl Karnataka virus [ToLCKV]) by PCR using universal begomovirus primers. The begomoviruses were detected in 55.26% of whitefly samples, and SLCCNV was the most prevalent species (27.63%). Among the three cryptic species of B. tabaci, the virus detection rate was highest in Asia I (60%), followed by Asia II 1 (58.82%) and Asia II 5 (53.06%). Most viruses were detected in all three species, but AEV and ToLCKV were found only in Asia I and Asia II 1, respectively. Geographic analysis showed that SLCCNV was distributed in the whole country, which is similar to the distribution of the Asia II 5 species, but OELCuV and SyLCV were detected only in the middle region of Nepal. Our results provide important information on the begomovirus profile in Nepal which can be beneficial for plant virus risk assessment and develop the management strategies to reduce the damage of whitefly transmitted viruses.

scholarly journals Non chemical management strategies for control of tomato leaf curl virus

2017 ◽  
Vol 12 (Special-5) ◽  
pp. 1430-1435
Author(s):  
NAGAMANDLA RAMYA SRI ◽  
NAGULAPALLY SNEHA LATHA ◽  
SHANTANU JHA
Keyword(s):  
Management Strategies ◽  
Tomato Leaf ◽  
Chemical Management ◽  
Tomato Leaf Curl Virus ◽  
Tomato Leaf Curl ◽  
Leaf Curl Virus ◽  
Leaf Curl

scholarly journals A BRIEF DESCRIPTION OF TOMATO LEAF CURL VIRUS AND ITS MANAGEMENT

2020 ◽  
Vol 4 (3) ◽  
pp. 137-147
Author(s):  
Mustansar Mubeen ◽  
Yasir Iftikhar ◽  
Qaiser Shakeel ◽  
Farazia Hassan ◽  
Aqleem Abbas ◽  
...  
Keyword(s):  
Abiotic Factors ◽  
Management Strategies ◽  
Tomato Leaf ◽  
Biochemical Changes ◽  
Economic Losses ◽  
Tomato Crop ◽  
Tomato Leaf Curl Virus ◽  
Tomato Leaf Curl ◽  
Leaf Curl Virus ◽  
Leaf Curl

The tomato crop is affected by various biotic and abiotic factors. Among the biotic factors, Tomato Leaf Curl Virus (TLCV) is one of the most devastating viruses of tomato. The virus belongs to Begomovirus and family Gemniniviridae. The genome of virus is single-stranded-DNA. It is naturally transmitted through whitefly (Bemisia tabaci). The virus is responsible for causing severe economic losses up to 80% in tomato crop-growing regions and continuously threatening the tomato crops. The increasing severity of TLCV has compelled plant virologists to develop accurate detection and identification of the virus. TLCV is responsible for certain biochemical changes and considerably affecting the plant growth. Tomato Leaf Curl Virus is significantly influenced physiological parameters and metabolic activities of all tomato varieties. The biochemical changes of cellular components are caused due to morphological deviation of infected virus plants, and symptoms expressed by the plants can determine the magnitude of the vegetable losses. It is evident from the previous reports, that nutrients were effective in reducing TLCV from a tomato plant. Moreover, the usage of resistant varieties and controlling of whitefly population and management of TLCV by different nutrients are some of the economical and recommendable ways to manage TLCV. Among the organic management strategies, the compost is also considered best in suppressing disease severity. Moreover, epidemiology plays a vital role in the spread and progress of the disease. Keeping in view the importance of TLCV and its effects on tomato crop, the present review will highlight the etiology, physiology and management of TLCV.

scholarly journals Genetic population structure of Bemisia tabaci in Spain associated with Tomato leaf curl New Delhi virus – short communication

2017 ◽  
Vol 53 (No. 1) ◽  
pp. 25-31 ◽  
Author(s):  
Janssen Dirk ◽  
Simon Almudena ◽  
Crespo Oscar ◽  
Ruiz Leticia
Keyword(s):  
Cryptic Species ◽  
Bemisia Tabaci ◽  
Tomato Leaf ◽  
New Delhi ◽  
Genetic Population ◽  
Current Spread ◽  
The Mediterranean ◽  
Tomato Leaf Curl ◽  
Mitochondrial Cytochrome Oxidase ◽  
Leaf Curl

Tomato leaf curl New Delhi virus (ToLCNDV) originates from Asia where it is persistently transmitted by indigenous cryptic species of the whitefly Bemisia tabaci. The virus has recently invaded Spain, Tunisia, and Italy, and to investigate whether whitefly species new to the Mediterranean are involved, 35 populations were collected during 2015 from different crops in different regions of southern Spain. Comparison of partial mitochondrial cytochrome oxidase I sequences from the collected whiteflies revealed the existence of 7 different haplotypes belonging to the Mediterranean-Q1 cryptic species. ToLCNDV was detected in 15 populations collected from tomato, zucchini, and melon crops and from 5 different localities. The results suggest that MED-Q1 is also responsible for the current spread of ToLCNDV in Spain.

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