Publications by authors named "Varagur Ganesan Malathi"

Bitter gourd ( L.), one of the valued vegetable crops in India, is severely affected by yellow mosaic disease caused by two begomoviruses, tomato leaf curl New Delhi virus (ToLCNDV) and bitter gourd yellow mosaic virus (BgYMV). The symptoms are yellowing, distortion of leaf, puckering, and malformed fruits.

View Article and Find Full Text PDF

The tomato spotted wilt virus (TSWV) belonging to the genus Orthotospovirus, family Tospoviridae, causes severe necrotic disease in field crops and horticultural crops, resulting in considerable yield loss worldwide. The development of protein-based diagnostics is essential to track the virus transmission and prevent its spread in vegetatively propagated crops such as ornamentals. In this study, nucleocapsid (N) gene of TSWV was cloned in pET 28 a (+) expression vector.

View Article and Find Full Text PDF

Diverse endophytes with multiple functions exist in different banana cultivars. However, the diversity of cultivable bacterial endophytome that contributes to antifungal activity against Fusarium oxysporum f.sp.

View Article and Find Full Text PDF

Tobacco streak virus incidence in the cotton field, cv.CO14 at Department of Cotton, Tamil Nadu Agricultural University (TNAU), Coimbatore, India was nearly 36.50 %.

View Article and Find Full Text PDF

A begomovirus isolate collected from bitter gourd plants showing yellowing, puckering and stunting symptoms from Coimbatore district, Tamil Nadu, India was characterized. The full-length genome of the virus isolate was amplified by rolling circle amplification using phi29 DNA polymerase. The virus isolate exhibited 98% identity in the nucleotide sequence of DNA-A component with the Coccinia mosaic Virudhunagar virus (GenBank accession no.

View Article and Find Full Text PDF

The effect of Groundnut bud necrosis virus (GBNV) infection on the life history traits of its vector, Thrips palmi, and its feeding preference on GBNV-infected plants were studied. A significant difference was observed in the developmental period (first instar to adult) between the GBNV-infected and healthy thrips, wherein the developmental period of GBNV-infected thrips was decreased. However, there was no effect on the other parameters such as preadult mortality, adult longevity, and fecundity.

View Article and Find Full Text PDF