8/25/2023 0 Comments Coconut rhinoceros beetle control![]() Adults are black, 4-6 cm long, and are strong fliers. As the larvae grow, they moult twice, reaching 10 cm in length and 2 cm wide, before pupating at about 9 months. Breeding sites have also been found in old nests of magapodes, when these were near breadfruit trees.Įggs hatch after about 30 days producing C-shaped larvae (Photo 2), with heads of reddish-brown to brown. In Papua New Guinea, breeding sites occur in cocoa and coconut plantations associated with rotting stumps of shade tree (e.g., Gliricidia sepium). The eggs are creamy-white, about 5 mm long and 3 mm diameter, laid singly in soil near rotting logs or other decaying matter that provides food for the larvae. The damage allows entry of other organisms: termites and, especially, Rhynchophorus weevils. If the growing point is damaged, the palms die. The emerging fronds show V-shaped cuts, twisting, spiraling and truncated leaflets. Damage to coconuts is considerable, especially up to 5 years' old. The adults bore into crowns of coconut, oil palm, betel nut, and other palm species, as well as pseudostems of bananas (Photo 1). The main hosts are coconut, oil palm and betel nut, but the beetle is also found on banana, sugarcane and wild palms. It is recorded from Papua New Guinea and Solomon Islands. Different sub-species ( Scapanes australis australis and Scapanes australis grossepunctatus) exist in Papua New Guinea the situation in Solomon Islands has not been studied. Melanesian rhinoceros beetle, coconut rhinoceros beetle, Scapanes Scientific Name ![]() Apply mixture of either neem seed powder + sand (1:2) g per palm or neem seed kernel powder + sand (1:2) g per palm in the base of the 3 inner most leaves in the crown.Photo 3.Soak castor cake at 1 kg in 5 liter of water in small mud pots and keep them in the coconut gardens to attract and kill the adults.Field release of Baculovirus oryctes inoculated adult rhinoceros beetle 15 beetles/ha reduces the leaf and crown damage caused by this beetle.Application of green muscardine fungus, Metarrhizium anisopliae 5 x 10 11 spores / m 3 - spray 250ml Metarrizhium culture + 750ml water in manure pits to check the perpetuation of the pest.The dispenser may be hanged in a plastic bucket having 2 liter of insecticide solution once in a week. Set up Rhino lure pheromone trap 5 traps/ha to trap and kill the beetles.Treatment will have to be repeated every six months. Treat manure pits and other possible breeding sites with 0.01% carbaryl (50 % WP) on w/w basis.Place phorate 10 G 5 g in perforated sachets in two inner most leaf axils for 2 times at 6 months intervals.three to four balls) covered with fine sand, once in 45 days. ![]() (b) For seedlings, apply Naphthalene balls 10.5 g (approx. (a) Sevidol 8G 25 g + fine sand 200 g, which is to be done thrice in a year in April-May, September-October and December-January.
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