What is baculovirus Class 12 Ncert?

In NCERT Class 12 Biology (Microbes in Human Welfare), baculoviruses are double-stranded DNA viruses that act as excellent, species-specific biological control agents (biopesticides) against insect pests, particularly in Integrated Pest Management (IPM) programs, as they have no negative impact on plants, mammals, birds, fish, or non-target insects, making them eco-friendly alternatives to chemical pesticides for crop protection.

What is baculovirus class 12?

**Definition of Baculoviruses**: Baculoviruses are a group of viruses that primarily infect insects, particularly those belonging to the order Lepidoptera (butterflies and moths). They are known for their rod-shaped structure and are classified under the family Baculoviridae.

What is the baculovirus in Ncert?

Baculoviruses are pathogens that attack insects and other arthropods. The majority of baculoviruses used as biological control agents are in the genus Nucleopolyhedrovirus. These viruses are excellent candidates for species-specific, narrow spectrum insecticidal applications.

What is the role of baculoviruses in biological control class 12?

Baculovirus play a major role in the control of insect pests that reduce the negative effect of synthetic insecticides on non-target groups and latter improve the integrated pest management for sustainable, effective and economical insect pest management practices.

What kind of virus is baculovirus?

Baculovirus is defined as a family of double-stranded DNA viruses that specifically infect arthropods, particularly the larval stages of Lepidoptera, where they form occlusion bodies that release viral particles to initiate the infection cycle.

Viruses (Updated)

Is baculovirus harmful to humans?

Because baculoviruses are not harmful to humans, they are considered a safe option for use in research applications. They are also used as biological agents as in the case of the Indian mealmoth, a grain-feeding pest.

What are the 4 DNA viruses?

These ROCC-inducing DNA viruses belong to 5 families (herpesviruses, baculoviruses, adenoviruses, parvoviruses, and geminiviruses) that infect a wide range of hosts and are important for human and ecosystem health, as well as for biotechnology.

What is the use of baculovirus?

Baculoviruses can also be used as gene delivery vectors, where certain genes of interest can be cloned into cells during gene therapy. These viruses are useful in this area as they have few cytotoxic effects in human cells, and do not replicate within them.

Which biocontrol agent is used to get rid of mosquitoes?

The most commonly used biological control agent is a naturally occurring soil bacteria called Bacillus thuringiensis israelensis, or Bti. Bti was discovered in Israel in 1977 and quickly became commercially available once it was shown to be an inexpensive, effective, and very target specific mosquito larvicide.

What is the biological control of bugs?

Biological control kills or sterilises the target pest, thereby reducing its abundance within the designated site or area. Examples of biological control agents include parasitoids, predators, or pathogenic fungi or viruses. This measure also includes the release of sterile insects (Sterile Insect Technique (SIT)).

What are the genes of the baculovirus?

Baculoviruses are made up of two genera: nucleopolyhedrovirus (NPV) and granulovirus (GV). The NPVs can be further divided into two groups (I and II) on the basis of the phylogenic relationships of 20 distinguishing genes (Herniou et al., 2001).

What microbes produce antibiotics?

Streptomyces is the largest antibiotic-producing genus, producing antibacterial, antifungal, and antiparasitic drugs, and also a wide range of other bioactive compounds, such as immunosuppressants.

What are the risks of using microbes?

Some microbes cause disease.

Pathogens can make us sick. These pathogenic bacteria, virus, and other microorganisms cause infections or make toxins that harm our bodies.

How is baculovirus made?

Baculovirus is produced in insect cells by transient transfection of bacmid DNA. The quality of bacmid is critical for the production of high-titer baculovirus. Typically, freshly prepared bacmid performs better than those are stored in the refrigerator for long period of time.

What are the 4 shapes of viruses?

The four main shapes of viruses are helical (rod-like/cylindrical), icosahedral (roughly spherical, multi-sided), enveloped (spherical or polyhedral with a host-derived membrane), and complex (combinations like head-and-tail bacteriophages or other intricate designs). These shapes define the virus's capsid, the protein shell protecting its genetic material, which can also have a simpler spherical appearance due to an outer envelope.
 

Is the baculovirus a fungus?

They can reduce fungal growth and pathogenicity. Baculoviruses are viruses that infect insects and arthropods. They have double-stranded DNA genomes and are commonly used as biological insecticides targeting specific pest insects. Examples include viruses used against gypsy moths and codling moths.

How do Japanese keep mosquitoes away?

Japanese people keep mosquitoes away using traditional methods like spiral incense coils (katori senkō) made from chrysanthemums, natural barriers like fine mesh screens, and modern sprays like "Skin Vape" for personal protection, alongside physical deterrents like fans and keeping sweat off. They often combine these with a philosophy of repelling rather than killing, using treated curtains, aromas, and air movement.
 

What does PETA say about killing mosquitoes?

PETA discourages killing mosquitoes, viewing them as living beings, and promotes humane, natural repellents like lemon eucalyptus oil or nets, while suggesting B vitamins for personal prevention; they argue against toxic pesticides and emphasize that mosquitoes are part of the ecosystem, offering alternatives to lethal methods to minimize harm and protect human health and the environment. 

What did Native Americans use to repel mosquitoes?

Native Americans repelled mosquitoes using a combination of physical barriers (mud, smoke), natural repellents (rancid animal fats, pungent plant pastes like yarrow, sweetgrass), and strategic location (windy hills over swamps). They applied animal fats (bear, alligator) mixed with herbs to skin and clothing, used smoke from fires, and utilized strong-smelling plants like pineapple weed or mint to mask human scents, showing deep ecological knowledge for survival.
 

Can baculovirus infect humans?

Of course, other viral vectors also lack inherent ability to replicate freely in mammalian cells but experimental restrictions in facility and equipment were less in the case of baculovirus. Despite the restricted host, it was reported that baculovirus can infect human cells (Volkman and Goldsmith, 1983).

Is baculovirus a GMO?

Both academic and industrial laboratories have since invested a great deal of effort to generate genetically modified (GM) or recombinant baculoviruses with dramatically improved speeds of kill.

Is baculovirus safe for the environment?

– A baculovirus offers highly specific pest control, targeting one or very few closely related insect species. Therefore, baculoviruses have no adverse effects on beneficial insects, plants, mammals or aquatic organisms (see table below). Key take out: Baculoviruses are safe for the user, consumer and the environment.

Which virus has no DNA?

Retroviruses have no DNA. However, the DNA of the infected host cell does possess viral DNA. How is it possible ? Retro viruses have no DNA.

Is COVID a DNA virus?

At their core, coronaviruses contain a genetic blueprint called RNA (beige), similar to DNA. The single-stranded RNA acts as a molecular message that enables production of proteins needed for other elements of the virus.

What are the 4 viruses in the US?

The “Quad-Demic” Threat That Could Hit This Winter: COVID-19, Flu, RSV, and Adenovirus. As we move into the holiday season, healthcare experts are warning of a potential “quad-demic” – the combination of four major respiratory viruses that could impact holiday plans and overwhelm hospitals.