Research

Agricultural Sciences

Title :

Development of Disease Diagnostic Kits for CTV, HLB, Phytophthora Gummosis and Citrus canker in Citrus of North East India

Area of Research :

Agricultural Sciences

Focus Area :

Plant Disease Diagnostics

Principal Investigator :

"Prof. Lingaraj Sahoo, Indian Institute of Technology (IIT), Guwahati, Assam; Dr. Rahul Hepat, Institute of Advanced Study in Science and Technology (IASST), Guwahati, Assam; Dr. Dwipendra Thakuria, CPGSAS, Central Agricultural University(Imphal), Umiam, Meghalaya; Dr. Lalit Laxman Kharbikar, ICAR- National Institute of Biotic Stress Management (NIBSM), Raipur, Chhattisgarh; Dr. Dinesh Singh, ICAR- Indian Agricultural Research Institute (IARI), New Delhi"

Contact info :

Timeline Start Year :

2021

Timeline End Year :

2025

Total Budget (INR):

2,82,.8,504

Details

Executive Summary :

The aims of the research proposal are: (a) develop a simple and cost-efficient diagnostic immuno-strip based diagnostic kit in dip-stick format for detection of CTV strains in infected plant parts both in nursery and orchard; (b) Identification of CTV strains from various hotspot regions of NER and development of artificial Agroinfectious dimeric clones for Agroinoculation in various Citrus germplasm for testing CTV susceptibility; (c) development of a LAMP-based Point-of-care diagnostic kit for detection of Phytophthora Gummosis, Canker and citrus greening (HLB) through systematic genetic diversity studies and (d) formulation of liquid synthetic microbial consortium’ for addressing these diseases.

Equipments :

Achievements :

An extensive survey was undertaken during 2021-22 and 2022-23 across major citrus-growing regions of Northeast Indiax, Meghalaya, Tripura, Manipur, Arunachal Pradesh, Sikkim, Nagaland and Assam, along with Punjab, Haryana and Delhi to investigate the causal agent of citrus root rotand gummosis. A standardized isolation method for Phytophthora spp. was developed using young lemon-leaf baiting on corn meal agar supplemented with pimaricin(10μg/ml), ampicillin (250μg/ml), rifamycin (10μg/ml) and carbendazim(300μg/ml).A total of 101 isolates were successfully obtained, maintained on carrot agar and preserved in sterile water at 4 °C. Morphological characterization revealed fast-growing colonies with chrysanthemum and rosette patterns and whitish blooming mycelia. Pathogenicity assays on detach

Outcome/Output:

1

Organizations involved