Graft transmissible pathogens

Citrus fruits belonging to the family Rutaceae, occupies a place of considerable importance in the fruit crop due to high economic returns. Citrus greening is one of the most severe disease of citrus. Citrus greening disease was presumed to originate in china during the 1890 (Graca 1991). It is evident that the citrus disease has emerged as a potential series threat to citrus production in all the citrus growing districts of Maharashtra. It has been proved that in Maharashtra the greening disease is the major causes a decline in citrus production.

9p nguaconbaynhay10 22-01-2021 7 2   Download

Citrus Yellow Mosaic Virus (CYMV) disease and citrus greening bacterium are two important diseases in citrus. Citrus yellow mosaic virus (CYMV) disease is caused by bacilliform DNA virus while citrus greening disease caused by a fastidious bacterium (Candidatus liberibacter asiaticus) (Cla). Both the pathogens are infected citrus plants may detected by PCR using leaf tissues midrib tissue incase of greening.

5p kethamoi6 29-06-2020 12 2   Download

A wide range of graft transmissible pathogens (GTPs) of viral, viroid and phytoplasma etiology affect apple trees resulting in diseases with adverse effects in orchards around the globe. The significance of diseases caused by these GTPs on tree health, fruit shape and quality has resulted in the imposition of legislation based quarantine measures at both domestic and international front. Losses resulting from viruses in apple often remain unnoticed as the impact of these pathogens on productivity is evident over a period of time.

19p nguathienthan4 18-04-2020 15 1   Download