Control of sweet potato virus diseases

Area of Science:

• Agricultural Science
• Plant Pathology
• Virology

Background:

• Sweet potato (Ipomoea batatas) is a globally significant food crop, ranking seventh in production and third among root crops.
• Vegetative propagation methods make sweet potatoes highly susceptible to yield-reducing virus diseases, with losses sometimes exceeding 50%.
• Key viruses include Sweet potato feathery mottle virus (SPFMV) and Sweet potato chlorotic stunt virus (SPCSV), with complex infections causing substantial yield reduction.

Purpose of the Study:

• To outline the standard methods for controlling virus diseases in sweet potato cultivation.
• To detail the process of producing and distributing virus-tested planting material to farmers.

Main Methods:

• Virus detection in high-yielding plants using PCR, serology, and grafting to indicator plants.
• Meristem tip culture from virus-free plants to generate new plantlets.
• Cultivation of meristem-derived plants under insect-proof conditions to prevent reinfection.

Main Results:

• The described methods enable the production of virus-free sweet potato planting material.
• This process ensures that farmers receive healthy plant stock, mitigating yield losses.

Conclusions:

• Supplying virus-tested planting material is the primary strategy for managing viral diseases in vegetatively propagated crops like sweet potato.
• Strict adherence to sterile techniques and insect-proof conditions is crucial for maintaining the virus-free status of planting material throughout propagation.