What preventive and controlling measures need to be taken before and after storing the grains?
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Drying
At the time of harvesting the moisture content in grains and seeds varies from 15-35%. Besides, grains have a tendency to absorb moisture from the atmosphere. If the moisture content is high, seeds are prone to be infested with pests and this in turn will decrease their quality. Hence moisture content in grains and seeds must be reduced to below 9% for their safe storage. To achieve this seeds have to be spread out and dried in the sun before drying in the shade. Mechanical hot air driers could also be used.
Hygiene
Granaries, godowns and stores should be well cleaned before stacking fresh grains. Any refuse, dirt, cobwebs and husk of the previous grain should be swept. The premises should be well maintained and any crack or hole in the wall, floor or ceiling should be sealed. Before reusing old gunny bags, they should be turned inside out, dusted thoroughly, exposed to sun and fumigated. If earthen pots are used, they should also be cleaned well and exposed to sun before storing fresh grains.
Prophylactic Treatment
As a preventive measure godowns should be treated with insecticides and pesticides. Gunny bags should also be sprayed. Grains that have to be used for seed purpose must be mixed with fungicide and insecticide.
Modern Storage Structures
Research organizations have developed improved storage structures which have proved comparatively safe for the storage of grains. In these structures, temperature, moisture, oxygen and carbon dioxide can be adjusted to protect the grains. The structures are airtight, moisture impervious, thermally insulated and rodent proof. Changes in outside temperature do not affect the grains stored in these structures. Some of these storage structures are Pusa Bin, Pusa Cubicle, Pusa Kothar and Pant Kuthla.
Pest Control
It is not safe to mix insecticides and pesticides with grains meant for human or animal consumption. If any of these are used they should be within safety norms.
Chemical Control
Spraying of BHC wettable power, pyrethrum and malathion at 3 weeks interval can be done as a prophylactic treatment of the surface area of the store house.
The dosage recommended is as follows.
BHC WP (50%) 31/100m2 area in 1:25 dilution
Pyrethrum (2.5 EC) 31/100 m2 area in 1:300 dilution
Malathion (50 EC) 31/100m2 area in 1:300 dilution
Many of these chemicals are contact poisons and care should be taken while using them. Gloves and masks should be used by the person spraying the chemical.
hope u got it
At the time of harvesting the moisture content in grains and seeds varies from 15-35%. Besides, grains have a tendency to absorb moisture from the atmosphere. If the moisture content is high, seeds are prone to be infested with pests and this in turn will decrease their quality. Hence moisture content in grains and seeds must be reduced to below 9% for their safe storage. To achieve this seeds have to be spread out and dried in the sun before drying in the shade. Mechanical hot air driers could also be used.
Hygiene
Granaries, godowns and stores should be well cleaned before stacking fresh grains. Any refuse, dirt, cobwebs and husk of the previous grain should be swept. The premises should be well maintained and any crack or hole in the wall, floor or ceiling should be sealed. Before reusing old gunny bags, they should be turned inside out, dusted thoroughly, exposed to sun and fumigated. If earthen pots are used, they should also be cleaned well and exposed to sun before storing fresh grains.
Prophylactic Treatment
As a preventive measure godowns should be treated with insecticides and pesticides. Gunny bags should also be sprayed. Grains that have to be used for seed purpose must be mixed with fungicide and insecticide.
Modern Storage Structures
Research organizations have developed improved storage structures which have proved comparatively safe for the storage of grains. In these structures, temperature, moisture, oxygen and carbon dioxide can be adjusted to protect the grains. The structures are airtight, moisture impervious, thermally insulated and rodent proof. Changes in outside temperature do not affect the grains stored in these structures. Some of these storage structures are Pusa Bin, Pusa Cubicle, Pusa Kothar and Pant Kuthla.
Pest Control
It is not safe to mix insecticides and pesticides with grains meant for human or animal consumption. If any of these are used they should be within safety norms.
Chemical Control
Spraying of BHC wettable power, pyrethrum and malathion at 3 weeks interval can be done as a prophylactic treatment of the surface area of the store house.
The dosage recommended is as follows.
BHC WP (50%) 31/100m2 area in 1:25 dilution
Pyrethrum (2.5 EC) 31/100 m2 area in 1:300 dilution
Malathion (50 EC) 31/100m2 area in 1:300 dilution
Many of these chemicals are contact poisons and care should be taken while using them. Gloves and masks should be used by the person spraying the chemical.
hope u got it
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