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Biological Control of Agricultural Insect Pests

Biological Control of Agricultural Insect Pests

What is Biological Control of pests?

Benefits of Biological Control of pests

Different Types of Biological Agents:

  1. Parasite
  1. Predator
  1. Pathogens:

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Biological Control of Agricultural Insect Pests

Parasite:

(1) Trichogramma species:

(2) Encarsia species:


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Biological Control of Agricultural Insect Pests

(3) Apentellis species:

(4) Tachinid fly:

(5) Epiricania melanoleuca:


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Biological Control of Agricultural Insect Pests

(b) Predators:

(1) Chrysopa :

(2) Ladybird Beetle:

(3) Geocoris :


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Biological Control of Agricultural Insect Pests

(c) Pathogens :

 (1) Bacteria :


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 (2) Viruses:

(3) Fungi :

Biological Control of Agricultural Insect Pests

FAQs:

1. What is the Biological Control of Insect-Pest in Agriculture?

Ans: Biological control is the control of harmful pests by using parasitic and predatory insects and pathogens is called biological pest control.

2. Name the different Parasite Biological Control agents used for Insect-Pests control in Agriculture.

Ans: Different Parasite Biological Control agents used for Insect-Pests control in Agriculture are as under: • Trichogramma wasps • Encarsia species • Apentellis species • Tachinid fly • Epiricania melanoleuca

3. Name the different PREDATORS Biological Control agents used for Insect-Pests control in Agriculture.

Ans: Different PREDATORS Biological Control agents used for Insect-Pests control in Agriculture are as under: • Chrysopa • Ladybird Beetle • Geocoris

4. Name the different PATHOGENS Biological Control agents used for insect pest control in Agriculture.

Ans: Different PATHOGENS Biological Control agents used for Insect-Pests control in Agriculture are as under: o Bacteria: Bacillus thuringiensis and Bacillus popilii o Viruses: Nuclear Polyhedrosis Viruses (NPVs) o Fungi: Beveria baeziana, Metarhizium antisepsis and Lecanicillium lecani

5. How NPV-Nuclear Polyhydrosis Viruses Kill the Agriculture Insect-Pests?

Ans: Among the different types of viruses, nuclear polyhedrosis viruses (NPVs) are more widely used in the field of pest control. It is specially used to control green caterpillars and armyworms. When the virus enters the intestinal wall along with the food of the worm and the special type of cells present it attacks and destroys it. Diseased caterpillars initially stop eating. As the severity of the disease increases, the liquid is expelled through the mouth of the caterpillar in the form of vomiting and from the anus in the form of diarrhea and the caterpillar dies. Such a dead caterpillar is found hanging upside down on the top of the plant by its hind legs.

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