Bean pod borer (entomology)

Entomology

1. Welcome To my Presentation Name: Md . Abdul Hannan ID:12309078

2. Topic Name Pod Borer/Bean Pod Borer

3.   Common Name : Pod borer / Bean pod borer Scientific Name : Maruca vitrata Family : Crambidae Order : Lepidoptera Species: M. vitrata Economic importan : It is the major pest of Bean and also cowpea . It can cause losses of 20-80% on the harvests of cowpeas. The larvae feed on the buds and flowers and bore into the pod to eat the developing seeds. Bean pod borer moths are active at night but shelter within the plant canopy during the day. Crops are invaded at the beginning of flowering. The flowers and pods are bound together by frass -covered web produced by the larva.

4. Similar species Moths may be confused with those of the beet webworm ( Spoladea recurvalis ) but are slightly larger, and have predominantly pale hindwings , as opposed to the predominantly brown hindwings of S. recurvalis .

5. Life cycle : Crops may be infested from early budding onwards. The eggs are laid on or in the flowers (inserted between the petals). Young larvae feed inside flowers for 5-7 days before moving to the pods when mid-sized. Favoured entry points are where flowers and pods are touching.

6. Con,t After completing their development (10-15 days from egg hatch), larvae exit pods and pupate in the soil. Occasionally the larvae indulge in vegetative feeding and have been observed tunnelling in the stems and feeding inside the rolled and webbed leaves of luxuriantly growing (moisture-stress-free) peanuts. Larvae can reach 18 mm in length. Bean pod borer moths have a 20-25 mm wingspan and a slender body.

7. Damage Seeds within damaged pods are totally or partially eaten out by bean pod borer larvae. Entry holes also let in water, which stains the remaining non-eaten seeds. In peanuts, bean pod borer larvae may web young leaves together and may tunnel in plant stems. Such damage is not typical of its behaviour on other legumes.

8. Control: Crop rotation Sex pheromone Biological suppression

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