3. Methods.
• 1) Tillage operation
• 2)Crop Rotation
• 3) Trap Cropping
• 4) Sanitation of field
• 5) Time of sowing / planting
• 6) Use of resistance variety
• Merits& Demerits.
4. 1) Tillage operation⛏️
• Ploughing & other tillage operation expose to (insect) to upper soil
surface which are picked by ( bird’s) Or destroy by ( Heat).
• E.X:- Bihar hairy caterpillar, Fruit fly,Gram pod borer
• It also help in removal of weeds which may serve as host for insects.
Tillage is the agricultural prepration of soil
mechanical agitation of various types.
5. 2) Crop Rotation:-
Growing different crop every year.
Crop rotation- Cereal crop- Insect.
Legumes
Repeat- legume-Insect dominant.
6. 3) Trap cropping.
• The pest which effect the
main crop they will be
diverted towards the the
trap crop main crop will be
safe.
• E.g Okra Is good trap
crop Fir cotton to attract
Jassids & spotted
bollworming.
7. 4) Sanitation of field.
Removel & destruction of all undesirable
plants plant debris weeds & clean cultivation
of field.insects use the plant residues weeds
as host& increase the pest attack in next
season. e.g. Sugarcane borer.
8. 5) Time of sowing /planting.
• Adjusting time of sowing infection of
some pests can be prevented .if the planting
& egg laying time are same then pest attack’
the crop.
• E.g Sugarcane should be harvested before mid Feb to avoid egg
laying of top borer.
9. 6) Use of resistant varities.
• Some morphological or genitic factors
associated with the variety make the variety
resistant for some pest
• E.g. Deshi cotton is more resistant to jasids
whitefly& bollowarm than American cotton.
10. Merits Demerits.
• May be Cheap & simple.
• Environmentaly Safe
• It is well matched with other
methods of pest control.
• It gives least chance of insect
development.
• Knowledge of ecology &
biology is essential.
• Timing decides Success
• No complete control.
• Required long term planning.
