agrochemicals

1. INNOCENT HEARTS GROUP OF INSTITUTIONS
Jalandhar Punjab
Agri... Dept
Topic:- Fate of herbicides and insecticide
Classifications of insecticides
Presented by:-
Dharmendra Kumar
Bsc ag.

2. Contents
Fates of herbicides and insecticides
Classification of insecticides

3. Fates of herbicides and insecticides
• Adsorption to soil coloid
• Photo degradation
• Chemical degradation:- hydrolysis, oxidation and reduction
• Leaching
• Drift
• Water runoff
• Volatilization
• Depositon crop leaves
• Enter in food chain

5. Factors affecting fates of herbicides and
insecticides
Environmental factors
• Wind
• Rainfall
• Microbial population
• Humidity
• Soil pH, composition,om ,texture
• Slope
• Vegetation
Other factors
• Spray volume
• Application pressure
• Career
• Formulation
• Time of spray
• Volatility

6. Classification of insecticides
1. On basis of chemical
composition
• Organic:-Animals originatef and plants originated
• Inorganic
• Synthetic
2. On the basis of mode of entry into insects body
• Contact poison
• Stomach poison
• Fumigant
• Systemic insecticides

7. 3. On the basis of mode of action
• Physical poison
• Protoplasmic poison
• Respiratory poison
• Nerve poison
• Chitin inhibitor
• General poison
4. On the basis of stage specificity
• Ovicide
• Pupicide
• Larvivide
• Adulticide

8. 5. On the basis of toxicity
• Extremely toxic – Colour: red, symbol:
skull and poison, oral LD50: 1-50
• Moderately toxic – Colour: blue, symbol:
danger, oral LD50: 501 – 5000
• Highly toxic – Colour: yellow, symbol:
poison, oral LD50: 51 – 500
• Less toxic – Colour: green, symbol:
caution, oral LD50: >5000

9. Thank you
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