Stored Grain Insect Pests

Insects Attacking Stored Grains, Seeds, and Grain Products Dr. Ayanava Majumdar Extension Entomologist Alabama Cooperative Extension System Gulf Coast Research & Extension Center 8300 State Hwy 104, Fairhope, Alabama 36532 Cell phone: 251-331-8416

front corners of pronotum not pointed rounded or irregular punctures Maize weevil or Sitophilus zeamais oryzae molitor Oryzaephilus

[object Object],[object Object],[object Object],[object Object],Insect Attacking Stored Grain Insects: hard exoskeleton, three part body (head thorax, abdomen), jointed appendages, legs never >3 pairs Arachnids: two body regions (head+thorax fused, large abdomen), jointed appendages but >3 pair legs normal HEAD PROTHORAX ABDOMEN

How insects respire? ,[object Object],[object Object],[object Object],[object Object]

BEETLES/WEEVILS IN STORED GRAIN

Granary weevil vs. Rice Weevil ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Granary weevil, Sitophilus granarius S. oryza

Granary weevil vs. Rice Weevil ,[object Object],[object Object],[object Object],Granary weevil, Sitophilus granarius S. oryza

Feeding injury from weevils ,[object Object],[object Object],[object Object],[object Object],[object Object]

Sawtooth vs. Merchant grain beetles ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],Damage from grain beetles

Red flour beetle (RFB) Tribolium castaneum ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Confused flour beetle (CFB) Tribolium confusum ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Feeding injury by RFB & CFB ,[object Object],[object Object],[object Object],[object Object]

Lesser grain borer (LGB) Rhyzopertha dominica ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Lesser grain borer feeding injury ,[object Object],[object Object],[object Object],[object Object],[object Object]

Drugstore beetle vs. Cigarette beetle ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Stegobium paniceum Lasioderma serricorne

Feeding injury by drugstore & cigarette beetles ,[object Object],[object Object],Cigarette beetle damage

Cadelle Tenebroides mauritanicus ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Feeding injury from cadelle ,[object Object],[object Object],[object Object],[object Object]

Mealworms ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Insect is native of Europe. 1 2 3 4 Ground beetle 1 2 3 4 5 5 tarsal segments

Dermestid beetles ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Carpet beetle , Anthrenus sp. Khapra beetle, Trogoderma

Angoumis grain moth Sitotroga cerealella ,[object Object],[object Object],[object Object],[object Object],[object Object]

Grain moth damage ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Indian meal moth Plodia interpunctella ,[object Object],[object Object],[object Object],[object Object],[object Object],Meal moth larvae Bracon hebetor

Damage by Indian meal moth ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Mediterranean flour moth Ephestia kuhniella ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],Feeding injury by mediterranean flour moth

Storage temp. vs. Insect activity

0 150 300 450 0 1 2 3 4 No. of Insects Months The number of insects present at the start of storage is critical Treat the storage areas and harvest at the right time to cut postharvest losses!

Back to basics… ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Source: Page & Lubatti (1963), Parkin (1956), Fields & White (2002)

Back to basics… ,[object Object],[object Object],[object Object],[object Object],Source: Page & Lubatti (1963), Parkin (1956), Fields & White (2002)

Stored Grain Insect Pests

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Stored Grain Insect Pests