Ehtisham Ali Hussain University College Of Agriculture, University Of Sargodha, Sargodha For more Topics Contact.., shamu.hassan.eh@gmail.com

1. INSECT PEST
OF STORED
PRODUCTS
Ehtisham Ali Hussain
University College Of Agriculture,
University Of Sargodha, Sargodha

2. INTRODUCTION
• Scientific name : Rhyzopertha Dominica.
• Family :Bostrchidae.
• Order : coleoptera.
• (Rhyzopertha dominica) Although it is still relatively
rare, the lesser grain borer has
• become the most commonly encountered primary
pest of stored grain in Montana.

3. IDENTIFICATION
• The adults of this species are readily distinguished by
the “squared-off” appearance at the
• front of the body. Viewed from directly above, the cover
of the thorax hides the head.
• The adults are less than 1/8 of an inch in length and
range from reddish brown to dark
• brown. This species is a good flier, and adults are readily
trapped in pheromone-baited
• traps at harvest. However, infestations are infrequent,
when compared to the rate of
• capture for adults in these traps.

4. LARVA
• The larva are white to cream coloured with biting
mouthparts
• Larva has three pair of legs .
• Young larva are mobile in bulk.
• It is sacarabaeiform.

5. ADULT
• Adult is 2-3 mm long reddish brown in colour.
• Slim cylindrical in shape.
• The elytra which cover memberaneous hind wings .
• The head is not visible when viewed from above
and its antennae end in a distinctive 3 segmented
club shape.

6. ADULT

7. LIFE CYCLE OF L.G .B
• The eggs are laid singly among the grains .
• The larva feed upon the flour.
• The larva pupa with in the grain and grain dust.
• After pupation adult emerged and remains inside
the grain for some days then comes out.
• There are 5-6 generations in a year.

8. LIFE CYCLE

9. DAMAGES
• Both larva and adult attack on the grains and
cause damage by feeding and making many
irregular hole on them .
• In severe infestation a considerable amount of frass
is produce by adult and they spoil more then what
they eat .
• On the flour young grabs are nourished.

10. DAMAGES

11. INSECTICIDES
RESISTANCE
• The lesser grain borer has shown high resistance to
malathion in wheat producing areas
• where it is more common. It is moderately tolerant
of the insecticide chlorpyrifos-methyl
• (Reldan®), so this insect is not listed on the label. A
light to moderate tolerance has been
• found to phosphine gas, once again in those areas
where it is more commonly
• encountered.

12. INSECTICIDES

13. BIOLOGICAL CONTROL
• There are a number of insect predators and
parasitic wasps that attack insect pests of
• stored grain. All are effective if used in
overwhelming numbers. However, biologicals
• are generally not used because the Food and Drug
Administration (FDA) and food
• processors do not accept live insects or insect parts
in raw grain. This inudative approach
• is simply the addition of very large numbers of
beneficial insects.

14. INSECTICIDES
• Cyfluthrin.
• Diacon .
• centynal.

15. INSECTICIDES

16. CONTROL
• Properly dry the stored products before storage.
• Store grains in the clean cantainers .
• Plug all the crevices and cracks in the store .
• Fumigation of food grains and store with carbon
tetra chloride should be done .