COCOS - Journal of the Coconut Research Institute of Sri Lanka
Permanent URI for this collectionhttps://dl.nsf.gov.lk/handle/1/7343
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Item A technique for the application of systemic insecticides through petiolar wells in coconut(CRI, 1989) Perera, P.A.C.R.; Mahindapala, R.; Pethiyagoda, U.Item Efficacy of naphthalene balls in the control of rhinoceros beetle attacks in coconut(Coconut Research Insitute. Lunuwila, 1990) Sadakathulla, S.; Ramachandran, T.K.Item Pheromone baited trap for the management of red palm weevil, Rhynchophours ferrugineus F. (Coleoptera:Curculionide) population in coconut plantation(Coconut Research Institute. Lunuwila, 1998/1999) Rajapakse, C.N.K.; Gunawardena, N.E.; Perea, K.F.G.4-methyl-5-nonanol (ferrugineol), the major component of the aggregation pheromone of rhynchophorus ferrugineus F. was evaluated as a lure for trapping of this pest in coconut plantations in Sri Lanka. Trap design, longevity of ferrugineol in field conditions, and the effect of trapping on damage incidence of R.ferrugineus were studied. N-pentanol, a known compound present in coconut stem volatiles was used in combination of ferrugineol in all tested traps. Trap designs tested were; an open plastic bucket, a funnel trap, and a modified metal trap. The open plastic bucket (5L) baited with ferrugineol -pentanol, which was hung on coconut palm stem at 1.5m, caught significatly more number of adult weevils than ferrugineol pentanol baited funnel and metal traps. An open plastic bucket trap was six times less expensive than the metal trap currently recommended by the Coconut Research Institute, Sri Lanka. Ferrugineol remained effective as a balt for 12 weeks under field conditions. High capture rates of adult R. ferrugineus were obtained in ferrugineol baited open bucket traps in plantations where the initial damage incidence was high. Monthly surveys of individual palms during pheromone trapping revealed that a sharp reduction of the number of coconut palms demaged by R. ferrugineus in 10 hectare experimental blocks. Continuous trapping of weevils with ferrugineol over a period of time significantly lowered the infestation of this pest.Item Population dynamics of the coconut caterpillar, opisina arenosella walker (Lepidoptera:Xyloryctidae), in Sri Lanka(CRI, 1989) Perera, P.A.C.R.; Hassell, M.P.; Godfray, H.C.J.Item New records of some pests of the coconut inflorescence and developing fruit and their natural enemies in Sri Lanka(CRI, 1987) Fernando, L.C.P.; Kanagaratnam, P.Item Effectiveness of used engine oil in the management of coconut mite, Aceria guerreronis (Acari:Eriophyidae)(CRI. Lunuwila, 2004) Chandrasiri, K.A.S.; Fernando, L.C.P.Item Efficacy of single dose anticoagulants against rodents damaging coconut(CRI, 1991-93) Sadakathulla, S.; Kareem, A.A.Crown baiting with bromodiolone 0.005 per cent ready made rodenticide cake @ four bits, weighning 16.5g each at the base of the four bunches bearing the tender nuts of fist size and above on four sides in the crown of palm was found very effective in controlling rodent damage.