T7 recognition of natural enemies in crops

Natural enemies

beneficial organisms that kill or weaken insect pests and reproductive capacity

1. predators

2. parasites

3. microbial agents

3 groups of natural enemies

Predators

organisms that feed on several preys (pest) to complete their life cycle

generalists

Most predators are -

Chewing

Most predators have what kind of mouthpart?

Parasite

lives in the body of another organism and usually hides in the segment

Parasitoid

Parasitizes and kills an arthropod host, usually during their immature stages

Parasitoid

Include insect species that require only one host (insect species) to complete their life cycle. usually smaller than the host.

pupa

They dont like moist environments

egg parasitoid

attacks and parasitizes eggs

larval parasitoid

attacks and parasitizes larvae, usually specialists

pupal parasitoid

attacks and parasitizes pupa

adult parasitoid

attacks and parasitizes adults

under leaves

where do lacewings lay their eggs?

Microbial pathogens

Organisms that cause disease on other organism

Beauveria bassiana

a fungus, that infects its host upon physical contact. The host’s body will die because of these toxins and the consumption of the insect’s body by the fungi.

Bacillus thuringiensis

infects an insect host upon ingestion of the bacteria containing Bt toxin. used in genetically modified crops