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Wily A. Baringbing
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STUDIES ON HIDARI IRAVA LEAF CONSUMPTION IN RELATION TO WARNING SYSTEM IN THE CONTROL OF THE COCONUT PEST Wily A. Baringbing; Bariyah Baringbing
International Coconut Community Journal Vol 9 No 02 (1993): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v9i02.273

Abstract

Two‑month laboratory and field experiments were carried out to investigate amount of leaflet consumed by the leaf‑eating caterpillar. Hidari irava Moore, during the larval stadium in an effort to determine the right time to control the pest chemically. The experiment was conducted in Pakuwon Experimental Garden, West Java, Indonesia in 1990. A total of 70 larvae of the hesperiid were reared in laboratory. Mature coconut leaflets replaced daily with fresh material. Were cut arid measured for food of the caterpillars in glass containers. Fifty mature hybrid coconuts, Malayan Red Dwarf (MRD) x West African Tall (WAT), were studied to calculate the leaflet weight of each leaf. A leaf was cut from each palm. There were 50 leaves used altogether. Results of the study showed that a single larva, from the second to fifth instars, consumed 13.90 g coconut leaflet. Weight of leaflets per leaf was 2,562.79 g and 66,455.29 g per tree. A population of 18.43 larvae per leaf caused 10% damage to the crown of a palm tree.
STUDIES ON HOST PREFERENCE OF PARASA LEPIDA ON SOME CULTIVARS OF HYBRID COCONUT IN SWAMPY AREA Wily A. Baringbing; Bariyah Baringbing
International Coconut Community Journal Vol 10 No 02 (1994): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v10i02.284

Abstract

A two‑month f ield experiment to study host preference of the leaf‑eating cater­pillar, Parasa lepida cramer, on 5 cultivars of hybrid coconut: Green Khina‑1, Brown Khina‑1, Nias Yellow Dwarf (NYD) x West African Tall (WAT),. Malayan Red Dwarf (MRD) x WAT, and Camerun Red Dwarf (CRD x Rennel Tall (RLT), aged 2.5 years, was carried out in swampy area of South Sumatra province, in 1991. A number of 30 palms, taken at random, from each block of the above mentioned hybrids were studied. Hence, there were 1SO trees observed altogether. The population of larvae per leaf as well as their dwellings in the fronds were recorded to investigate age of leaf consumed. Results of the study showed that none of the hybrids were resistant to P. lepida larvae. Cultivar of NYD x WAT was attacked more followed by Green Khina‑1, NYD x WAT, CRD x RLT, and Brown Khina ‑ 1. Leaves of half matures of all hybrids were preferred compared to those of the others.
STUDIES ON CHELONUS SP. THE PARASITE OF THE COCONUT MOTH BATRACHEDRA ARENOSELLA WALKER Wily A. Baringbing; Bariyah Baringbing
International Coconut Community Journal Vol 13 No 01 (1997): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v13i01.308

Abstract

An experiment was conducted at a coconut pest laboratory at Nita, elevation 250 m, Sikka regency, Flores island, province of East Nusa Tenggara, to study mass production of Chelonus parasite by using Phthorimaea operculella Zeller as its host, in an effort to control the coconut moth, Batrachedra arenosella Walker, biologically. Results of the experiment showed that the parasite could be produced in laboratory by using P. operculella as the host and a 10% solution of honey as food for both parasite and the adult host. A female parasite gave an average of 14 offspning during their lives with a sex ratio of 2.27:1, between male and female. The sex ratio of the same parasite in the field with B. arenosella as its host was 1:1. The incubation period of the parasite in laboratory was 26 days for males and 27 days for females. The sex ratio of the moth in the field as 1: 1.26.
STUDIES ON PESTS IN 4 COCONUT CULTIVARS IN LAMPUNG PROVINCE Wily A. Baringbing; Bariyah Baringbing
International Coconut Community Journal Vol 14 No 01 (1998): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v14i01.315

Abstract

A three‑year field study to investigate species of pests on four (4) coconut cultivars: PB‑1 21, PB‑111, KH17VA‑1 and dwarf Salak, was carried out in Lampung province involving 11 visits from November 1991 to April 1993. Only two regencies: Lampung Utara and Lampung Tengah with 3 and l sub‑districts, respectively were surveyed But only three sub‑districts of Lampung Utara: Sungkai Selatan, Manggala and Mesuji and only Terbanggi Besar in Lampung Tengah were studied Observations of Brontispa longissima Gestro, Plesispa reichei Chapuis, Oryctes rhinoceros Linnaeus, Xylotropus Gideon (Linnaeus), Rhynchophorus vulneratus (Panzer), and the others were studied. Results of the study showed that no cultivars were resistant to any species of pests in Lampung province. There were 19 species of pests, 2 of which do not belong to the insect present in the 2 regencies. The 17 species of insects belong to 4 orders including: Coleoptera, Lepidoptera, Homoptera and Orthoptera in 3, 5, 1 and l families, respectively.
Co-Authors Bariyah Baringbing