Entomology -
Stored Grain Pest

About 500 species of insects have been associated with stored grain products. Nearly 100 species of insect pests of stored products cause economic losses Storage insect pests are categorized into two types viz.

Stored Grain Pest

Primary Pest

Those that infest intact commodities. Primary pests attack and breed in previously undameged commodities. They do not attack milled or ground foodstuff. They are more destructive than secondary pests.

Secondary Pest

Which feeds on processed grain/require the commodity to be damaged before they can infest it.They attack only materials that have been previously damaged either by primary pests or by poor handling and storage. They also attack processed items like flour or milled rice.

Primary Pest

DRUGSTORE BEETLE - Stegobium paniceum
PEANUT BRUCHID - Caryedon serratus
RICE WEEVIL - Sitophilus oryzae
SWEET POTATO WEEVIL - Cylas formicarius
KHAPRA BEETLE - Trogoderma granarium
LESSER GRAIN BORER - Rhyzopertha dominica
POTATO TUBER MOTH - Phthorimaea operculella
PULSE BEETLE - Callosobruchus chinensis
CIGARETTE BEETLE - Lasioderma serricorne
GRANARY WEEVIL - Sitophilus granaries
GRAIN MOTH - Sitotroga cerealella

Secondary Pest

INDIAN MEAL MOTH - Plodia interpunctella
MERCHANT GRAIN BEETLE - Oryzaephilus Mercator
MEDITERRANEAN FLOUR MOTH - Ephestia kuehniella
SAW TOOTHED GRAIN BEETLE - Oryzaephilus surinamensis
ALMOND MOTH - Cadra cautella
FLAT GRAIN BEETLE - Oryzaephilus surinamensis
RICE MOTH - Corcyra cephalonica
LONG HEADED FLOUR BEETLE - Latheticus oryzae
CONFUSED FLOUR BEETLE - Tribolium confusum
RED FLOUR BEETLE - Tribolium castaneum