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Question: What is stored grain pest?

Stored-grain insects are known as “internal feeders” if they feed within the kernels, otherwise they are referred to as “external feeders.” The granary weevil, rice weevil, lesser grain borer, and larvae of the Angoumois grain moth are in- ternal feeders.

What do you mean by stored grain pest?

Primary grain pests attack the whole grain. The eggs are laid inside the grain, before the larvae mature inside the grain and then chew their way out. Some of these pests include the Lesser grain borer, Granary weevil (Sitophilus granarius, the Wheat weevil) and Rice weevil (Sitophilus oryzae).

What are different Stored grain Pests?

Primary and secondary storage insects

  • Rice weevil: Sitophilus oryzae, S.
  • Khapra beetle: Trogoderma granarium.
  • Lesser grain borer/Hooded grain borer/paddy borer beetle: Rhyzopertha dominica.
  • Angoumois grain moth or Grain moth: Sitotroga cerealella.
  • Pulse beetle: Callosobruchus chinensis, C.
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How can stored grain pests be managed?

Management of stored product pests in Warehouses

  1. Maintain store house hygiene brushing the cracks, crevices and corners, removing all debris and cleaning the entire godown before storing the grains.
  2. Reduce moisture content below 10 %
  3. Dry all the bags, bins etc in the sun.

What are various stored grain pests infecting the seed during storage?

Several fungi can cause grain spoilage in storage, but the most common ones include Penicillium spp, Aspergillus spp, Alternaria spp, Fusarium spp, Rhizopus stolonifera, Mucor spp, and others.

Is moth a storage pest?

The main storage pests, apart from rodents, are beetles and moths. Some pests such as grain borers, weevils and Angoumois grain moths are able to feed on whole, healthy grains, they are considered primary pests.

Are termites storage pests?

Several species of dry wood and subterranean termites are storage pests and can become a problem in farmers’ granaries or in village stores. Most of the damage occurs in wooden storage structures, but some subterranean termites also feed directly on the stored grain.

What are storage fungi?

Storage fungi (also called storage molds) are fungi which invade grains or seeds during storage. Storage fungi are usually not present to any serious extent before harvest. The most common storage fungi are species of Aspergillus and Penicillium. These fungi are widely distributed and almost always present.

What is the difference between field pest and storage pest?

A field pest is any organism which causes damage to crops when still on the field before harvesting whereas, a storage pest is any organism which causes damage to farm produce in storage.

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What are the signs of infection of stored grains?

Common signs of an insect infestation: Sweet, musty odor in grain. The lesser grain borer is known to leave behind dust and thin brown shells in grain, as well as a sweet, musty scent. Rice weevils leave holes in grain and deposit larvae inside of kernels.

How should grains be stored?

All whole grains should be stored in airtight containers with tight-fitting lids or closures. The type of container is a matter of preference. Glass, plastic, and aluminum canisters or zip-top plastic bags can all be successfully used, as long as they are airtight.

Which of the following can be used for protecting stored grains at home?

Turmeric application method Grains and seeds are mixed with turmeric powder before storing them in containers or jute bags. This treatment provides protection for up to 6-8 months and is equally safe for consumption.

How can we prevent storage pests?


  1. Inspect the roof for any leaks and repair if necessary.
  2. Inspect the bin for any cracks, holes or gaps and seal if necessary.
  3. Remove any old grain from the bin.
  4. Clean the walls and floor of the bin to remove any grain, dust or debris by sweeping or vacuuming.
  5. Clean any old grain spills from around the bin.

What are the sources of infestation by storage pest?

Sources of infestation Carried -over commodities, waste and rejects. Agricultural machineries. Processing plants Farm grain stores and re-used sacks.

What are the major insect pest in storage commodities Slideshare?

This presentation contains valuable information on major insect pests of stored foods like Angoumois grain moth, Indian meal moth, Rice moth, Potato tuber moth etc.

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