Correct Option
The 'Wolbachia method' refers to a biological control strategy aimed at reducing the transmission of mosquito-borne viral diseases. This method involves introducing Wolbachia bacteria into mosquito populations, particularly Aedes aegypti, which is a primary vector for diseases such as dengue, Zika, and chikungunya.
Wolbachia is a naturally occurring bacterium found in a wide range of insect species, but it is not naturally present in Aedes aegypti mosquitoes. When Aedes aegypti mosquitoes are infected with Wolbachia:
- The bacteria compete with viruses within the mosquito, thereby reducing the mosquito's ability to transmit these viruses to humans.
- Wolbachia is passed from infected female mosquitoes to their offspring, leading to the gradual spread of virus-resistant mosquito populations in the environment.
This approach effectively suppresses the transmission of target viral diseases over time.
Incorrect Options
Option (B): Converting crop residues into packing material is an initiative related to sustainable waste management and the development of eco-friendly packaging solutions. It does not involve the Wolbachia method.
Option (C): Producing biodegradable plastics typically involves microbial fermentation processes using various bacterial strains (e.g., Pseudomonas, Ralstonia) or plant-based materials. The Wolbachia method is not associated with this process.
Option (D): Producing biochar from the thermochemical conversion of biomass is a process primarily aimed at soil amendment, carbon sequestration, and waste management. It is unrelated to vector-borne disease control using Wolbachia bacteria.