Plantwise Factsheets for Farmers
Rhinoceros Beetle in Coconut
Recognize the problem
beetle is a black-coloured
horned beetle which is active at night and hides in feeding
or breeding sites during the day. The beetle attacks the young leaf fronds which,
when fully opened, show characteristic
diamond shaped cuts. Repeated attack can destroy the top portion resulting in
the death of the palm.
The adult beetles from the manure pits
or the nearby trees bore into the opened fronds of the young palms and cause
damage. The rhinoceros beetle feeds on young growing tissue and eats the exuded sap. The grubs of the beetle are
usually found in manure pits.
Wipe out the grubs in the manure pits by pouring 250 ml green muscardine fungus (Metarhizium anisopliae) culture mixed
with 750 ml of water into manure pits
- Keep the coconut farm clean by chopping and burning the decayed
and affected logs
- Hook out the beetle from the attacked palm using the beetle hook
- Place three naphthalene balls in the leaf axil at the top of the
crown to repel the beetles
- Set up light traps following the first
rains in summer and monsoon period to attract and kill the adult beetles
- Use pheromone traps with
Rhinolure @ 12 /ha for trapping the adults, then destroy them
- Soak castor cake @ 1 kg/ 5 litres of
water in small mud pots and keep them in the coconut gardens to attract and
kill the adults
- Treat the longitudinally split tender
coconut stem and green petioles of fronds with fresh toddy and keep them in the
garden to attract and trap the beetles
- Apply a mixture of Neem Seed
Kernel Powder + sand (1:2) @150g/ palm at the base of the 3 inner most leaves
in the crown
- For nut bearing
coconut, root feed with TNAU coconut tonic at 200ml/palm, once in six months.
Apply 200 g of borax/ palm /year in two splits.
The recommendations in this factsheet are relevant to:
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