Physical Method to Control Insect Pests

Manipulation of the physical factor to control the insect

"Physical factor are mainly applicable in store houses, wear house or in control condition in natural condition we do not control the physical factor"

Temperature:

If we increase the temperature of the store house up to 50 °C for 10-12 hours a number of store insect are control to avoid the attack of pink bollworm on the cotton seed we use heat treatment of the sees  52 °C for 5 mint

Sun drying:

Moisture increase the chance of attack, this practice is recommended in end May and June   larvae and adult killed by the direct sun drying heat

Super heating of store:

Charcoal is used 6kg/1000ft square for heating the store 3-4hours for burning the charcoal until the temperature reach 140-150 °F

Use of low temperature:

Insect are inactive  due to low temperature  insects activity decrease  cold storage practiced are recommended  for  perishable commodity  like fruit, vegetable if the temperature of the store room is 40- 60 °F most  of the insects become inactive and not cause damage.

Moisture:

If grain moisture of wheat is 8% than it is ideal for storage for rice 16% moisture is ideal for storage.

Radiation: Gamma radiation is most effective in store room

Electricity and Light trap:

Electricity and Light trap are also used to capture and kill the insects.