Citrus

Citrus Tristeza Virus

Citrus Tristeza Virus (CTV) is the most important and destructive pathogen affecting citrus worldwide. During last century the disease destroyed several millions trees in South America, United States and Europe. Depending on the virus strain, CTV causes different symptoms on citrus plants, varieties and scion-rootstock combination. The primary action in the disease control is the certification of bud-stock and the use of resistant rootstock. Bud-stock trees should be periodically tested and indexed. Trees showing severe stem-pitting, dwarffing or reduced vigor are not eligible for propagation. The CTV antibodies have been developed by the Dr. Zemzani from the Moroccan Royal Domains. These antibodies are highly sensitive and recognize all strains, worldwide. Thanks to this collaboration, Agdia offers you a range of products to help you detect CTV.

Xanthomonas axonopodis pv. Citri

Xanthomonas axonopodis pv. Citri is the bacteria responsible of citrus canker disease. It causes necrotic lesions on leaves and fruits. The disease is present in Asia, Africa, North and South America and Oceania. In Europe it is considered as quarantine pathogen and it has been included in the A1 EPPO list. The Xac Flashkit® can be used as a confirmation tool to support the visual diagnosis of Asiatic citrus canker on fruit, or on leaves and stems of mature trees. The lesions of suspect tissues can be easily tested on-site. This test was evaluated by scientists from Florida’s Department of Plant Industry and USDA-PPQ.

ELISA the most popular diagnostic method, allows running many samples during large scale surveys for CTV control in nurseries

Immunoprinting is an alternative diagnostic method for CTV allows easy sampling of citrus trees onto nitrocellulose membranes where the reactions take place. The positive result shows an image of the vascular tissue with dark blue spots in the vascular bundles, whereas the negative control remains uncolored.

Flashkit® are quick detection kits based on immuno-chromatography system. These kits are as reliable and can be often as sensitive as ELISA tests used in laboratories. These kits are user-friendly. In just a few minutes you will know if a tree is infected or not.