EHTISHAM ALI HUSSAINBAGF15E258University College Of Agriculture, University of Sargodha shamu.hassan.eh@gmail.com

2. Dhora beetle
Callosobruchus chinensis
EHTISHAM ALI HUSSAIN
BAGF15E258
University College Of Agriculture,
University of Sargodha

3. Contents
 Contents
 Taxonomy
 identification
 Life cycle
 Behavior
 Habitat
 Damages
 Control

4. Taxonomy
 Kingdom: Animalia
 Phylum : Arthropoda
 Class: Insecta
 Order: Coleoptera
 Family: Bruchidae
 Genus: Callosobruchus
 Species: C. chinensis, C. maculatus
Binominal name: Callosobruchus chinensis

5. Identification
Egg
 Laid singly, stick in to seed,
Fresh eggs are translucent,
White in color
Larva
 Fleshy, Curved,
Creamy white in color,
Black mouth parts.

6. Pupa
 Pupation takes place in a pupal cell prepared beneath the
seed coat.
Adult
 3- 4 mm long
 oval shaped
 Brownish grey beetle with dark spots
 body is pointed towards front.
 Adults are short lived, it is harmless and do not feed on storage
produce at all.

7. Life Cycle
 Consists of four stages
 Egg stage
 Larval stage
 Pupa stage
 Adult stage

9. Behaviour
 C. chinensis shows has death feigning behavior as an anti-predatory
technique. During this behavior, under certain stimulus that startles the
insect, the beetle will roll onto its back and curl its legs up. This is likely to
be used in order to dissuade parasitoid wasps from preying on the beetle.
 Temperature has been shown to alter this behavior in adult beetles. As
temperatures rise, this behavior becomes less common. A larger body size
also has a decline in thanatosis.

10. Habitat
Usually found in
 Grain storage facilities
 Food markets

11. Damage
 The adult and larva feed on the grain by making a small hole.
 Infested recognitions - by white eggs round exit holes
Host range
All whole pulses, beans and grams

12. They usually infest
 It prefers cowpea (Vigna catjang)
 red gram
 arhar
 lentil
 pea
 small pea
 mung
 soybean
 khesari etc.

13. Control
Physical control
 Exposure of the grain to sun light .
 Dry the pods to optimum kernel moisture level of about 7 %.
 Store the pods in polythene-lined gunny bags with a layer of sand.
 Fumigation with aluminum phosphide protects the seed without affecting
the viability.
 Coat the seed with small quantities of vegetable oil or mix neem leaves in
the stored grain.

14. Chemical Control
 Fumigation with aluminum phosphide protects the seed without affecting
the viability.
 Apply E.D.B. ampulses at 3 ml/q of seed in air tight storage structure.
 Fumigation with aluminum phosphide protects the seed without affecting
the viability.
Biological Control
 Coat the seed with small quantities of vegetable oil or mix neem leaves in
the stored grain.