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Montong, Bernadeth V.
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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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Abstract

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
EFEKTIFITAS ESKTRAK PUTRI MALU, BAWANG PUTIH, DAN LENGKUAS TERHADAP PENYAKIT KARAT PUTIH (Puccinia horiana Henn.) PADA PEMBIBITAN TANAMAN KRISAN (Chrysanthemum sp.) Kalrengsang, Sandra O. K.; Montong, Bernadeth V.; Ratulangi, Max M.
COCOS Vol 8, No 8 (2021)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v8i8.37308

Abstract

ABSTRACTChrysanthemum (Chrysanthemum sp.) is an ornamental plant that produces flowers that havehigh economic value. Chrysanthemum flowers have the potential to be developed because they are ingreat demand by the public in terms of beautiful shapes and colors. One of the important stages inchrysanthemum cultivation is seeding. The main problem in chrysanthemum farming is the attack ofwhite rust caused by a fungus (P. horiana) starting from seedling to harvesting. The use of plantextracts as alternative pesticides has many advantages and benefits. Plants that have the potential tobe used as botanical pesticides include mimosa, garlic and galangal. This study aims to determine theeffectiveness of giving the extracts of mimosa, garlic and galangal in chrysanthemum plant nurseriesto suppress white rust disease caused by the fungus P. horiana. This research was carried out usingan experimental design, namely a completely randomized design (CRD) which consisted of 4 (four)treatments and 4 replications, namely K (control), P1 (20% mimosa extract), P2 (20% garlic extract),and P3 (20% galangal extract). Based on the results of observations of the symptoms of white rust (P.horiana) the upper surface of the leaves at first in the form of yellow spots which gradually changedcolor to dark brown, then on the lower surface of the leaves can be seen the presence of pustules thatare pink, and long Over time the pustules will get bigger and then turn white. The highest percentageof attacks was in the control (K) 10.08%, the garlic extract treatment 20% (P2) 4.27%, then followedby the 20% galangal extract treatment (P3) 3.33%, and the mimosa extract treatment 20% (P1)0.96%. The results showed that the use of extracts of Putri malu, garlic and galangal was able tosuppress white rust disease (P. horiana) in chrysanthemum plant nurseries, with the best treatment insuppressing white rust disease (P. horiana) which was mimosa extract 20% (P1 ) with attackpercentage : 0.96%, followed by galangal extract (P3) : 3.33% and garlic extract (P2) : 4.27%. Inaccordance with the results of the research that has been carried out, it is necessary to carry outfurther research on the use of Mimosa Extract, Garlic and Galangal against white rust (P. horiana) inchrysanthemum plant nurseries with higher concentrations and in other varieties of chrysanthemumseedlings.Keyword : effectiveness, extract, mimosa, garlic, galangal, chryns, white rust disease