the detail description of the pest of coconut

1. PEST OF COCONUT

2. RHINOCEROS BEETLE
• Scientific Name : Oryctes rhinoceros
• Family : Scarabaeidae
• Order : Coleoptera
• Host range : pine apple, sugar cane , areca
nut, sago , oil palm
3/30/2020 2N.AVINESH

3. SYMPTOMS
• Central spindle appears cut or toppled
• Fully opened fronds showing characteristic
diamond shaped cuttings
• Holes with chewed fibre sticking out at the
base of central spindle
3/30/2020 3N.AVINESH

4. 3/30/2020 N.AVINESH 4

5. BIOLOGY
• EGG: Female lays oval creamy white eggs in
manure pits or decaying vegetable matter at
depth of 5- 15 cm
• EP: 8- 18 days
• GRUB: stout, sluggish, and white with pale
brown , feeds decaying matter 99 to 180 days
• PUPA: pupates in earthen cells emerge as
adult in 10- 25 days
• ADULT : stout, block and has a long horn
projecting dorsally from the head in male.
Horn short in female.

7. MANAGEMENT
• Destroy and dispose of all dead trees
• Apply fungal culture of Metarrhizium
anisopliae
• Encourage reduviid predators Platymeris
laevicollis
• Set light traps to attract adults
3/30/2020 7N.AVINESH

8. RED PALM WEEVIL
• Scientific Name : Rhynchophorus ferrugineus
• Family : curculionidae
• Order : coleoptera
• Distribution : Kerala, Karnataka, Tamil nadu
3/30/2020 8N.AVINESH

9. SYMPTOM
• Holes on the with brownish ooze
• Yellowing of inner leaves and gradual wilting
of central shoot in the crown
3/30/2020 9N.AVINESH

10. 3/30/2020 N.AVINESH 10

11. BIOLOGY
• EGGS: female lays eggs in scooped out small
cavities on palms , lays 276 eggs EP: 2 – 5
days
• GRUB: apodous light yellowish grub , laraval
period 12 -33 days
• ADULT : reddish brown weevil has six spots
on thorax
3/30/2020 11N.AVINESH

12. 3/30/2020 N.AVINESH 12

13. MANAGEMENT
• Avoiding injuries on trunk . Any injury should
be plastered with clay or CEMENT WITH
COPPER OXYCHLORIDE
• Avoid cutting green fronds
• Avoiding incidence of rhinoceros beetle
• Root feeding with monocrotophos @ 10 ml +
10ml water
• Uses aggregation pheromone traps
3/30/2020 13N.AVINESH

14. BLACK HEADED CATERPILLAR
• Scientific name : Opisina arenosella
• Family : cryptophasidae
• Order : Lepidoptera
• Distribution : all over peninsular india
3/30/2020 14N.AVINESH

15. SYMPTOM
• Dried up patches on leaflets of the lower
leaves
• Galleries of silk and frass on underside of
leaflets
3/30/2020 15N.AVINESH

16. BIOLOGY
• EGG: greyish white small eggs , EP: 5 days
• LARVA: caterpillar is greenish brown with
dark brown head and prothorax, reddish
mesothorax. LP: 40 days
• PUPA : it pupates inside the web itself in a
thin silken cocoon
• ADULT: greyish white in colour
3/30/2020 16N.AVINESH

17. MANAGEMENT
• Cutting and burning all the infested leaves
and fronds
• In summer release BETHYLIDS and BRACONID
& EULOPHID parasitoids at 1: 1:10 per tree
• Root feeding with monocrotophos
3/30/2020 17N.AVINESH

18. SLUG CATERPILLAR
• Scientific name : Parasa lepida , Conotheyla
rotunda
• Family : cochlidiidae
• Order : Lepidoptera
• SYMPTOM:
• defoliation , leaving only the midrib and veins
3/30/2020 18N.AVINESH

19. BIOLOGY
• EGG: flat shiny eggs on the under surface of
leaves in batches of 20-30 . EP: 6-7 days
• LARVA: larval periods is about 42 days ,
greenish body with white links
• PUPA : compact brown shell like cocoon,
which is convex above and flat ventrally as
stems
• ADULT: moth has green wings with prominent
dark patches at the base of each forewing
3/30/2020 19N.AVINESH

20. WHITE GRUB
• Scientific name: Leucopholis coneophora
• Family : melolonthidae
• Order : Lepidoptera
• Host range : sweet potato, tapioca , colocasia ,
3/30/2020 20N.AVINESH

21. 3/30/2020 N.AVINESH 21

22. SYMPTOM
• Leaves turn yellow, immature nuts shed ,
flowering delayed
• White grubs exposed when base of the tree is
dug
3/30/2020 22N.AVINESH

23. BIOLOGY
• EGG: female lays eggs in the soil. EP: 20 days
• GRUB : larval period :10-11 months , pupal
period is 9- 12 days , pupation occurs in soil
• ADULT : adult beetle emerge after monsoon
showers
3/30/2020 23N.AVINESH

24. COCONUT ERIOPHYID MITE
• Scientific name : Aceri aguerreronis
• Family : eriophyidae
• Order : acarina
• Distribution :Tamil nadu , Karnataka, AP
3/30/2020 24N.AVINESH

25. SYMPTOMS
• Develops on the meristematic tissues under
the perianth
• Oozing of brown gummy exudation
• Reduced nut size and copra content and
malformation of nuts
• The mite is vermiform
3/30/2020 25N.AVINESH

26. 3/30/2020 N.AVINESH 26

27. BIOLOGY
• Mite is very minute in size
• It is pale in colour with elongate body and
worm like appearance
• Life cycle completed in 10 -12 days
3/30/2020 27N.AVINESH

28. MANAGEMENT
• Root feeding with TNAU agro biocide 30ml /
tree
3/30/2020 28N.AVINESH