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DESCRIPTION
Stored pest. pest for grains.
Citation preview
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