Name the genus of baculovirus that acts as a biological control agent inspite of being a pathogen. Justify by giving three reasons that make it an excellent candidate for the job.

or

‘‘Micro-organisms play an important role for the biological treatment of sewage.’’ Justify.

The provided question has two choices, and their respective correct answers/justifications are detailed below.

Choice 1: Baculoviruses as Biological Control Agents
The genus of baculovirus that acts as a biological control agent is Nucleopolyhedrovirus.
This genus is an excellent candidate for biological control due to the following three key reasons:
1. Species-specific action: They target only specific species of insects or other arthropods, ensuring that other organisms are not harmed.
2. Narrow-spectrum insecticidal applications: Their biological activity is highly targeted and limited to specific pest species, avoiding broad-spectrum destruction.
3. No negative impact on non-target organisms: They have been shown to have no adverse effects on plants, mammals, birds, fish, or other non-target insects.

or

Choice 2: Role of Micro-organisms in Biological Treatment of Sewage
Micro-organisms play a critical role in the biological treatment of sewage (secondary treatment) through the following steps:
1. Aeration and Agitation: The primary effluent is passed into large aeration tanks where it is constantly agitated mechanically and air is pumped into it.
2. Floc Formation: This continuous aeration and agitation allows the vigorous growth of useful aerobic microbes into flocs, which are masses of bacteria associated with fungal filaments to form mesh-like structures.
3. Reduction of BOD: While growing, these aerobic microbes consume the major part of the organic matter in the primary effluent. This significantly reduces the Biochemical Oxygen Demand (BOD) of the effluent, indicating a reduction in water pollution.