Titus Kakul
Community College of Rhode Island
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Publication
Featured researches published by Titus Kakul.
Journal of Chromatography A | 2000
Didier Rochat; Pamela Ramirez-Lucas; Christian Malosse; Rosa Aldana; Titus Kakul; Jean-Paul Morin
Solid-phase microextraction (SPME) samplings from live insects or natural secretion allowed one to identify the aggregation pheromones of the pest beetles Scapanes australis and Strategus aloeus by efficient and rapid isolation of their highly volatile (72 < M(r) < 116) components. S. australis male pheromone was identified as a 84:12:4 (w/w) mixture of 2-butanol [67:33 (R)-(-):(S)-(+) ratio], 3-hydroxy-2-butanone and 2,3-butanediol [43:17:40 (R,R)-(-):(S,S)-(+):meso ratio], and S. aloeus pheromone as a 95.5:4.0:0.5 (w/w) mixture of 2-butanone, 3-pentanone and sec.-butyl acetate by GC-MS using conventional and chiral capillary columns. This is the first report of Scarabaeidae pheromones based on such small and common molecules.
Journal of Chemical Ecology | 2002
Didier Rochat; Jean-Paul Morin; Titus Kakul; Laurence Beaudoin-Ollivier; Robert N.B. Prior; Michel Renou; Isabelle Malosse; Tanya Stathers; Sebastian Embupa; Samson Laup
Laboratory and field investigations were carried out to investigate the nature and role of the male pheromone emitted by the Dynast beetle Scapanes australis and to develop a mass trapping technique against this major coconut pest in Papua New Guinea. We report the biological data obtained from natural and synthetic pheromone, previously described as an 84:12:4 (w/w) mixture of 2-butanol (1), 3-hydoxy-2-butanone (2), and 2,3-butanediol (3). EAG recordings from natural and synthetic pheromone and a pitfall olfactometer were poorly informative. In contrast, extensive field trapping trials with various synthetic pheromone mixtures and doses showed that 1 and 2 (formulated in polyethylene sachets in 90:5 v:v ratio) were necessary and sufficient for optimum long-range attraction. Beetles were captured in traps baited with racemic 1 plus 2, with or without a stereoisomer mixture of 3 (2.5- to 2500-mg/day doses). Plant pieces, either sugarcane or coconut, enhanced captures by the synthetic pheromone, which was active alone. Traps with the pheromone caught both sexes in a 3:2 female–male ratio. A pheromone-based mass trapping led to the capture of 2173 beetles in 14 traps surrounding 40 ha of a cocoa-coconut plantation. The captures followed a log-linear decrease during the 125-week trapping program. The role of the male pheromone and its potential for crop protection are discussed.
Journal of Applied Entomology | 2000
Robert N.B. Prior; Jean-Paul Morin; Didier Rochat; Laurence Beaudoin-Ollivier; Tanya Stathers; Titus Kakul; Sebastian Embupa; R. Nanguai
Scapanes australis is a major coconut pest, endemic in Papua New Guinea. Early in the night, males placed singly into artificial galleries made in young coconut palms exhibited a sex specific calling behaviour for 1 to 1.5 h. Coming to the gallery entrance, they raised the abdomen and the hind legs, the head lowered inside the gallery, and emitted a liquid secretion, rhytmically smeared by crossing the legs. Females which did not behave so, were very mobile. The adult flying period coincided with the male calling behaviour. In field assays with caged insects on coconut palms, attraction of both sexes to males was evidenced when they were calling. Males fought for gallery possession at a male arrival. No aggression but mating was observed with arriving females, which proved not to have developed oocytes. The strong male attractionwas confirmed using automatic traps, baited with one lived male in a sugarcane piece. Male were assumed to release an aggregation pheromone. Further studies are underway to identify the putative pheromone.
Archive | 2001
Jean-Paul Morin; Sudharto Ps; Rolettha Y. Purba; Roch Desmier De Chenon; Titus Kakul; Samson Laup; Laurence Beaudoin-Ollivier; Didier Rochat
Plantations, recherche, développement | 1999
Laurence Beaudoin-Ollivier; Jean-Paul Morin; Robert N.B. Prior; Titus Kakul; Jean Ollivier; Didier Rochat; Dominique Mariau
Archive | 1999
Titus Kakul; Samson Laup; Tanya Stathers; Laurence Beaudoin-Ollivier; Jean-Paul Morin; Didier Rochat
Science in New Guinea | 2001
Laurence Beaudoin-Ollivier; Robert N.B. Prior; Jean-Paul Morin; R. Nanguai; Titus Kakul
Archive | 2000
Didier Rochat; Jean-Paul Morin; Olga Pamela Ramirez-Lucas; Christian Malosse; Rosa Aldana; Jorge Aldana; Titus Kakul; Laurence Beaudoin-Ollivier; Roch Desmier De Chenon; Kazem Mohammadpoor; Arman Avand-Faghih
Archive | 2000
Titus Kakul; Samson Laup; Laurence Ollivier; Jean-Paul Morin; Didier Rochat
Archive | 2004
Titus Kakul; Samson Laup; Robert N.B. Prior; Didier Rochat; Jean-Paul Morin; Sebastian Embupa; Laurence Ollivier