Begomovirus macroptilifloridaense

Begomovirus macroptilifloridaense is a plant pathogen belonging to the Geminiviridae family. As a typical begomovirus, it possesses a single-stranded DNA genome and relies on specific insect vectors for transmission between host plants, causing significant economic losses in affected legume crops.

The virus is primarily associated with the host Macroptilium lathyroides, acting as a natural reservoir. However, it readily infects cultivated legumes, including common beans (Phaseolus vulgaris). The virus interferes with the host's physiological processes, leading to stunted growth and reduced seed yield, which is critical for agricultural productivity.

Visible signs of infection include mosaic patterns on leaves, leaf curling, crinkling, and severe chlorosis. These symptoms often mimic nutrient deficiencies or damage caused by other viral agents, making precise diagnostics essential. As the virus progresses, the plant's ability to undergo photosynthesis is severely compromised.

Transmission occurs through the whitefly Bemisia tabaci. This insect vector acquires the virus while feeding on infected plant tissues and subsequently transmits it to healthy plants. Warm temperatures and high humidity create optimal conditions for both the multiplication of the whitefly population and the rapid spread of the virus throughout the field.

Control strategies for this virus are focused on preventing its introduction and managing the vector population. Because no direct cure exists once the plant is infected, emphasis is placed on using healthy, virus-free seeds, controlling weeds that harbor the virus, and implementing integrated pest management (IPM) to suppress whitefly activity effectively.

• Field sanitation to eliminate virus reservoirs.
• Regular monitoring of whitefly populations.
• Use of resistant or tolerant crop varieties.
• Implementation of physical barriers like mesh netting in greenhouses.