Biopesticide

Biopesticide

1. Biopesticide ROHIT(M.SC BIOCHEMISTRY) MDU ROHTAK

2. A  biopesticide  is a biological substance or organism that damages, kills, or repels organisms seen as pests.

3. Type of biopesticide 1 Microbial biopesticide 2.Plant-incorporated-protectants biopesticide 3 Biochemical biopesticide 4.Viral biopesticide 5.Fungal biopesticide

4. 1.Microbial pesticide Composed of microorganism like viruses,fungi,bacteria,protozoa or nematode applied as convenctional spray Include insecticide,Herbicide,fungicide eg :- Bt , Agrocin

5. Some importan microbial pesticide Bacillus thuringiensis Agrobacterium radiobactor Pseudomonas fluorescens Trichoderma Metarizium anisopliae Verticillum lecanii Nomuraea riley Baculoviruses

6. Mode of action

7. 2.Plant-incorporated-protectants pesticide Pesticidal substance produce from panlts Importan botanical pesticide - Neem oli ., Rotenone,Tobacco suspension

8. 3.Biochemical pesticides Naturally occurring substance that control pests by non- toxix mechanism Eg Azadirachtin (broad spectrum inseticide ) Capsaicin ( Compound from chili peppers-Broad spectrum inseticide ) Clove,Rosemary and peppermint oil(broad spectrum fungicide)

9. Biochemical pesticide Nervous system impair signal transduction Respiratory system blocking spiracle leads to suffocation Neurotoxin causing paralysis and death Affect DNA,RNA and protein synthesis Neuroendoceine system juvenile hormonal imbalance,decrease fertility,fecundity,malformation Cellular level distrubing ion pump,sognal transduction Mode of action

10. 4.Viral pesticide Virus used for pest control. Narrow spectrum Eg.Pox virus , Tetraviruses,Polydnaviruses

11. Mechanism 1.Ingestion of occluded viruse by larvae 2.Dissolving of protein capsule in midgut 3.Virions infect the larvae 4.Viruse replicate inside the host 5.Forming of new occluded viruses 6.Death of larvae and releasing of occluded viruses

12. 5.Fungal pesticide Fungi specially associated with insects k/d entomooathogenic fungi. Fungi attack the host via gut epithelium. Steptomycetes produce toxins. Most active toxins are actinomycin A,cyclohexamide and novabiocin . Eg.Nomurea rileyi

13. Mode of action

14. Advantages Biopesticide are less toxic than conventional pesticides. Target only pest and closely related sp. Effective in very small amount Cheap,renewable can be handle safely Difficult for insects to develop resistance to these pesticide.

15. Disadvantage of using biopesticide Not available easily. Poor water solubility Lack resistance and wide spectrum activity Rapidly degraded by UV lights