angoumois grain moth

Angoumois Grain Mothsitotroga cerealella

H.N.B.R AbeysingheU.W.L.U SampathP.C WerathungeD.K.P. Weerasooriya

Scientific classification

Phylum - Arthropoda (Arthropods) Class - Insecta (Insects) Order - Lepidoptera (Butterflies and Moths) Superfamily - Gelechioidea Family - Gelechiidae (Twirler Moths) Subfamily - Chelariinae Genus - Sitotroga Species - cerealella

Life cycle

Adult

Egg

Larva

Pupa

Adult

Adult

Wing expanse of 13-19 mm and a length of 6-9 mm.

Forewings are clay-yellow and without markings .

The hind wings are grey

Rear edges wings have long fringes

Eggo The female lays eggs

singly or in clumps on the outside of the cereal grains.

o The number of eggs laid is variable but may total up to 200 during a life of 5-10 days.

Larva

The larvae bore in to a kernel which they hollow out completely in the course of development

Pupa

Pupation also takes place inside the kernel. Before pupation, the larva extends the anterior of its chamber to just beneath the surface of the grain, thus forming a small circular window.

The newly emerged adult pushes through the window of the seed coat leaving a small but characteristic round hole; part of the window often remains at the edge of the hole.

Adult Emergence

Diets

The adults' moth feed on honey ,water etc.

larvae feed on grains.

They bore into the seeds of the host plant and feed inside the seed covering.

Damage

A primary pest of grain, which may be

attacked in the field,

Most damage occurs in storage.

Attacks all types of cereal grains.

Harvesting and drying

Grain moisture content (12-14%)

Minimize cracked and broken grain during processing

Don’t mix old and new grain

Cleaning And Disinfesting The Storage System

By sanitation or hygiene Use of monitoring devices May need to treat with insecticide

Malathion (50EC) at 5ml/20l of water @20ml/m2,

Fenitrothion (50EC) at 5ml/l water @20ml/m2,

Deltamethrin (2.5% WP) at 1.5g/l water @20ml/m2

Treat Infected Grain

Grain treatmentInsecticide-

malathionFumigation

phosphine, carbon dioxide

PhysicalHeat