Read the following paragraph and answer the given questions.

Bio-fertilisers are organisms that enrich the nutrient quality of the soil like cyanobacteria, while there are organisms that help to control plant diseases and pests. The very familiar beetle, the ladybird and dragonflies are useful to get rid of aphids and mosquitoes, respectively. An example of microbial biocontrol agents that can be introduced to control butterfly caterpillars is certain bacteria, which are available in sachets in the form of dry spores. These spores are mixed with water and sprayed onto vulnerable plants. Trichoderma species that are very common in the root ecosystem, are very effective biocontrol agents of several plant pathogens. Baculoviruses attack insects and other arthropods. Usage of these viruses is desirable when an ecological sensitive area is being treated.

A farmer wants to get rid of aphids, but does not want to use insecticide, Choose the best option for him?

Ladybird

The correct answer is Option (1) → Ladybird 

In agriculture, there is a method of controlling pests that relies on natural predation rather than introduced chemicals. The very familiar beetle with red and black markings – the Ladybird, and Dragonflies are useful to get rid of aphids and mosquitoes. Ladybird beetles, also known as ladybugs or ladybirds, are beneficial insects that feed on aphids, which are pests that can damage plants. Ladybird beetles are often introduced into agricultural fields or gardens as a form of biological control to naturally reduce aphid populations. Similarly, dragonflies are natural predators of mosquitoes and their larvae. Dragonflies are known for their voracious appetite for mosquitoes and are commonly used as a biocontrol agent to control mosquito populations in certain areas.