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Watung, Jackson F.
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Journal : COCOS

PENGGUNAAN EKSTRAK TANAMAN BUAH LANTA (Excoecaria agallocha L.) DALAM PENGENDALIAN HAMA PENGGEREK BATANG (Hexamitodera semivelutina Hell.) PADA TANAMAN CENGKEH (Syzygium aromaticum L.) DI DESA RERER KECAMATAN KOMBI KABUPATEN MINAHASA Rambi, Trivandi Efraim; Manueke, Jusuf; Watung, Jackson F.; Pakasi, Sandra E.
COCOS Vol 3, No 3 (2020)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v3i3.28692


ABSTRACT Clove (Syzygium aromaticum L.) in English called cloves, is a scented dried flower stalk from the Myrtaceae family. Clove is a native plant of Indonesia, widely used as a main ingredient in Indonesian clove cigarettes. Pests are one of the inhibiting factors in efforts to increase Clove productivity. This study aims to determine the effect of extracts of lanta (Excoecaria agallocha L.) against larvae attack (Hexamitodera semivelutina) on clove plants (Syzygium aromaticum L.) and determine the concentration of lanta fruit extract which is the best in controlling H. semivelutina larvae attacks on clove plants In Rerer Village, Kombi District, Minahasa Regency. The study was conducted in October to December 2019. The study uses a purposive sampling method (Purposive Sampling Method), which is to choose or determine the location and object of research directly. The study consisted of 5 treatments and 4 replications. Each treatment consisted of 5 sample clove trees that had one active H. semivelutina larvae, so the number of sample trees needed was = 100 trees. materials and equipment include lanta fruit, blenders, filters, plastic containers, injection tools, knives / cutters and mobile / camera clay. The results showed that the highest percentage of H. semivelutina larvae hole due to the use of lanta fruit extract was found in treatment D (concentrated extract 20%) that is 100%, then followed by treatment C (concentrated extract 15%) that is 75%, treatment B (concentrated extracts) 10%) is 55% and the lowest is in treatment A (5% concentrated extract), which is 35%. Keywords: E. agallocha, H. semivelutina, Clove
Sebaran dan Persentase Serangan Hama Paralecta sp. Pada Tanaman Cengkeh di Kabupaten Kepulauan Sangihe Tahulending, Yunita; Watung, Jackson F.; Montong, Bernadeth V.; Pakasi, Sandra E.
COCOS Vol 5, No 5 (2020)
Publisher : COCOS

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ABSTRACTClove (Syzygium aromaticum L) is a trade plant that has a high economic value in Indonesia.This study aims to determine the distribution and percentage of pest attacks Paralecta sp. inthe Sangihe Islands Regency. This study uses a survey method or direct research at theresearch location. The study was conducted at several clove plantation locations in theSangihe Islands. Observation of the distribution of branch borer pests and clove branches wascarried out in clove plantations, then marked using GPS and recorded coordinate points thencopied to map images using the arcMap 10.5 mapping program. Observation The percentageof attacks carried out on plantations used as sample locations and determined 25 sample treesto be used to calculate the percentage of attacks. Results of the study There were 18 locationsfound pests attack Paralecta sp. namely in the Central Sangihe and to the southern part withthe percentage of attacks that reached 100%, namely in the Village of Malamenggu 448meters above sea level, 435 meters above sea level and 8 points of location that were notfound is a pest attack Paralecta sp. that is, in the middle of Sangihe to the northern part ofSangihe with 0% attack percentage.Keywords: Clove, Distribution, Paralecta sp. Percentage of attack
COCOS Vol 5, No 5 (2021)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v5i5.35469


Abstract Butterflies are a group of insects belonging to the order Lepidoptera, which have two pairs of wings and a scaly body. Butterfly species richness may decrease due to increased deforestation and conversion of forest land which affect the diversity of larval and imago feed plants. The purpose of this research was to analyze the diversity of butterfly species and feed plants for larvae and imago in the protected forests of Mount Tampusu and Mahawu. The method used in this research is the pathway count method. The results showed that there were 5 families of 37 species of butterflies in the two research locations including 26 species in the Mount Tampusu protected forest and 23 species in the Mount Mahawu protected forest. The results of the analysis of the Shannon-Wiener diversity index are H'= 2.74 and the evenness index analysis is: E = 2.74/ln (37) = 0.76. The larval food plants found in the Mount Tampusu Protection Forest were Ficus sp. and feed for larvae found in the Mount Mahawu Protection 2 Forest, namely Glochidion sp., and Alpinia sp.. The imago feed plants in the Mount Tampusu Protection Forest were Crassocephalum crepidioides, Lantana camara, Lindernia crustacean, Mikania cordata and forage plants in the Mount Protection Forest, namely Bidens pilosa, Crassocephalum crepidioides, Hyptis capitate, Impatiens sp., Sida acuta, and Vernonia sp.. Keywords: Butterflies, host plant and food plant, Mount Tampusu and Mahawu protected forests