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All Journal EUGENIA Jurnal Penelitian Pendidikan IPA (JPPIPA) Budapest International Research in Exact Sciences (BirEx Journal) Jurnal Agroekoteknologi Terapan Britain International of Exact Sciences Journal (BIoEx Journal) COCOS
Maxi Lengkong
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Education Environmental Science Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Physics Transportation

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JENIS DAN SERANGAN HAMA LALAT BUAH (Bactroceradorsalis) PADA TANAMAN TOMAT (Solanumlycopersicum.L) DI DESA TARAITAK KECAMATAN LANGOWAN UTARA KABUPATEN MINAHASA Monalisa Debora Setlight; Elisabet. R. M. Meray; Maxi Lengkong
COCOS Vol. 10 No. 8 (2018)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v2i6.25768

Abstract

ABSTRACT This study aims to determine: (1) the types of fruit flies that attack tomato plants and (2) the percentage of fruit fly attack Bactroceradorsalis on tomato plants in North LangowanSubdistrict, especially Taraitak Village.  The time of the study was carried out for two months, from March to April 2019. The research was conducted using a survey method at several tomato planting locations in  NorthLangowan sub-district. Sampling using the diagonal slice method is to determine randomly where to pick tomatoes sampled which was attacked by Bactroceradorsalis. On land determined 5 points that are the location in determining the plants observed by adjusting the shape or area of tomato plants planted by farmers. Based on the results of the study it can be seen that the percentage of B. dorsalis fruit fly pests attack. on tomatoes every week is different. The first week was 11.21 percent, in the second week it increased to 12.18 percent.  And in the third week also increased to 15.50 percent, then entered in the fourth week decreased to 9.08 percent and in the fifth week slightly increased to 9.44 percent. From the results of observations in the field of B. dorsalis fruit fly attack, the pests increased and decreased every week. Keywords : Fruit flies (Bactroceradorsalis), Tomato plants
VIABILITAS PUPA PARASITOID Diadegma semiclausum Hellen (Hymenoptera : Ichneumonidae) BERDASARKAN LAMA PENYIMPANAN DI LEMARI PENDINGIN R. Irsan Dj. Hutumoy; Caroulus S. Rante; Maxi Lengkong
COCOS Vol. 10 No. 8 (2018)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v2i6.26097

Abstract

ABSTRACT This study aims to determine the viability of the D. semiclausum parasitoid pupae on P. xylostella larvae stored in the refrigerator. The results of this study are expected to provide information about the viability of D. semiclausum parasitoid pupae which are stored in refrigerators so that they can assist farmers in carrying out biological control. The study was conducted in the area of farmers' cabbage growing in the Kakaskasen II Village, Tomohon City and the Entomology and Plant Pest Laboratory, Faculty of Agriculture, Sam Ratulangi University. The research lasted for four months from July to October 2019. The study used a survey method on farmers' cabbage flower plants. The location of the collection of P. xylostella and D. semiclausum pupae was carried out by purporsive sampling, which is collecting pupae where there are flower cabbage plants in Kakaskasen II Village. In the initial stage, pupae collection is carried out with the aim of propagation of P. xylostella pests. Furthermore, if the larvae of P. xylostella have entered the initial instar, then the collection of D. semiclausum parasitoid pupae with the aim of being released in a cage to paralyze the P. xylostella larvae. The results showed that the parasitoid pupa can survive in the refrigerator until the 34th day with viabiltas of 10.00%. Furthermore, on the 36th day until the 42nd day, the D. semiclausum parasitoid pupae were no longer found that had successfully survived into adult insects. When related to the duration of storage of the D. semiclausum parasitoid pupae in the refrigerator with pupa viability, the best pupae storage time is on the 22nd day with the percentage of parasitoid pupa viability of 75.00%. Keywords : Viability, P. xylostella, D. semiclausum, Tomohon
KAJIAN PENGENDALIAN HAMA PENGGEREK BATANG CENGKEH ( Hexamitodera semivelutina Hell. ) MENGGUNAKAN METABOLIT SEKUNDER JAMUR Metarhizium DAN Beauveria DENGAN METODE INFUS AKAR Fini Natalia Tumewan; Jackson Watung; Maxi Lengkong; Dewi R.
COCOS Vol. 12 No. 1 (2020): EDISI JANUARI-MARET 2020
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v5i5.30054

Abstract

SUMMARYThis research aims to determine the effectiveness of the use of secondarymetabolites of Metarhizium and Beauveria fungi by infusion of roots in clove plantsagainst H. semivelutina larvae. The results of the study are expected to benefitfarmers in controlling H. semivelutina pests with secondary metabolites of thefungus Metarhizium and Baeveria in clove plants by means of a root infusion.The study was conducted in a clove plantation area owned by farmers in TonsawangVillage, Tobatu District, Southeast Minahasa Regency, North Sulawesi. Theresearch lasted for 3 (three) months, from February to April 2020. This study useda Randomized Block Design (RBD) method on farmers' clove plants.Determination of plants that will be applied to the root infusion is done by lookingat plants that are attacked by H. semivelutina pests by looking at the hole that emitsliquid mixed with feces in the clove plants in Tonsawang Village, Tombatu District.In this study using secondary metabolites of Metarhizium fungus and Beauveriafungus in H. semivelutina pest control by means of root infusion.The results showed that the average effectiveness of the use of secondarymetabolites in controlling H. semivelutina reached 78.52%, with a percentage ofeffectiveness of the secondary metabolite of Metarhizium fungus at 81.05% whichwas not significantly different from the secondary metabolite of Beauveria that was75.59%, but significantly different from the control of 10.57 %.Keywords: Effectiveness, secondary Metarhizium metabolites of fungus,Beauveria, H. semivelutina, Tombatu.Keywords: Effectiveness, secondary metabolites of Metarhizium fungus,Beauveria, H. semivelutina, Tombatu.
TINGKAT KERUSAKAN DAN PADAT POPULASI HAMA Sexava coriacea L. PADA TANAMAN KELAPA DI DESA TONGUTESUNGI KECAMATAN IBU KABUPATEN HALMAHERA BARAT Avendi Rangkaya; Maxi Lengkong; Caroulus S. Rante; James B. Kaligis
COCOS Vol. 13 No. 1 (2021): EDISI JANUARI-MARET 2021
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v2i2.32535

Abstract

ABSTRACTSexava coriacea L. is a major endemic pest that attacks the leaves of coconut trees in WestHalmahera district and can cause damage so that plants cannot produce fruit and can cause plantdeath if severe attacks. This study aims to determine the level of damage and population density ofS. coriacea pests in coconut plantations in Tongutesungi Village, Ibu District, West HalmaheraRegency. The research was carried out in the coconut plantation area of Tongutesungi Village, IbuDistrict, West Halmahera Regency. Observation of the level of damage to S. coriacea was obtainedby taking five affected leaf sheaths by cutting them to drop them on the ground, then observing thedamage to coconut leaves. The number of fronds observed was 5 times 20 sample plants per 100fronds, so that the total observed fronds were 100 times 5 observation points, namely 500 fronds.Observation of population density of S. coriacea per sample tree was determined by directlycounting the number of insects both nymphs and imago found in coconut leaf midribs. Observationof population density was 4 fronds x 20 sample trees multiplied by 5 points. The observation areawas 400 fronds. The population density of S. coriacea was determined by obtaining the averagevalue of all observational data. The results of the study on the level of damage to the samplingleaves of coconut trees attacked by S. coriacea were 65.07% - 67.32% (> 50-75%) and very heavy79.19% - 81.21% (> 75-100) the average level of damage reached 65.07% - 81.21% or the averagelevel of damage from all observation locations was 74.71%. The population density of S. coriaceamidrib at all observation locations ranged from 1.87- 3.01 individuls/midrib with an averagepopulation density of 2.45 individuals/midrib.Keywords : Sexava coriacea L., Cococ nucifera L., degree of damage, population density
JENIS DAN POPULASI SERANGGA-SERANGGA HAMA GUDANG BIJI PALA DI KECAMATAN TUMINTING KOTA MANADO Michael A. Lumi; Maxi Lengkong; Jantje Jantje Pelealu
COCOS Vol. 13 No. 4 (2021): EDISI OKTOBER-DESEMBER 2021
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v5i5.35390

Abstract

ABSTRACT The insects that destroy nutmeg seeds are known to be Araecerus sp., Carpophilus sp., Lasioderma sp., and Tribollium sp. Long-term storage and improper post-harvest handling will cause warehouse pests to attack which causes quality degradation and yield loss. The objectives of the study were (1) to determine the types of insect pests that attack nutmeg seeds in the warehouse and (2) to determine the population of insect pests that attack nutmeg seeds in the warehouse. This research was conducted in two ways, namely by direct capture method (hand sampling) and the use of yellow sticky trap traps. The direct capture method is carried out by taking samples of nutmeg seeds from five points, namely at the corner and center diagonally in the warehouse. The weight of the seed sample from each point was 500 grams, then put into a jar and covered with gauze. Sampling was carried out once a week five times. All samples were labeled and taken to the laboratory for calculation and species identification.Sampling using the Yellow sticky trap method is a trap made of yellow paper whose surface has been coated with adhesive glue. Yellow stick traps are hung in the nutmeg warehouse ± 2 meters from the warehouse floor surface, which are placed around piles of nutmeg sacks. The nutmeg warehouse where the observations were made was installed with four yellow sticky traps for three days. Observations were made at intervals of three days and repeated five times. Samples of trapped insects will be taken to the laboratory for population calculations and species identification. Based on the results of the discussion, it can be concluded that the insect pests that were found attacking nutmeg seeds in the storage warehouse in Manado City with the direct capture method (hand sampling) found six species, namely Anthribidae, Laemophloeidae, Silvanidae, Ptinidae, Tenebrionidae, Nitidulidae and those obtained by trapping (yellow sticky trap) six species were found, namely Anthribidae, Silvanidae, Laemophloeidae, Tenebrionidae, Tephritidae, Hymenoptera. The highest population is Tenebrionidae with a population of 66.6 individuals obtained by direct capture method (hand sampling); and 195.5 tails obtained by trapping (yellow sticky trap) Keyword : Insect, Pest, Warehouse, Nutmeg
UJI PATOGENISITAS JAMUR ENTOMOPATOGEN Beauveria bassiana Bals. TERHADAP WALANG SANGIT Leptocorisa acuta Thunb. PADA TANAMAN PADI Elhanan B. Kastilong; Maxi Lengkong; Reity Engka
COCOS Vol. 14 No. 3 (2022): EDISI JULI-SEPTEMBER 2022
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v8i8.36451

Abstract

ABSTRACT Rice ear bug (Leptocorisa acuta) in rice is an important pest that can reduce rice production. One of the control techniques is a biological control technique that utilizes the entomopathogenic fungus B. bassiana. This study aimed to examine the pathogenicity of the entomopathogenic fungus B. bassiana against L. acuta. This research was carried out in May - July 2021 at the Laboratory of Biological Agents of the Kalasey Food and Horticultural Crops Protection and Quality Testing Center. The study used a completely randomized design (CRD) with 4 treatments which were repeated 3 times. The experimental treatment used doses with conidium density B. bassiana, namely conidium density 108 conidium/ml (A), 107 conidium/ml (B), 106 conidium/ml (C), and control (K). Based on the results of the study after the application of B. bassiana to L. acuta, the pathogenicity level of B. bassiana in infecting L. acuta on the tenth day had a difference where the treatment with conidium density of 108 conidium/ml was able to cause 72% mortality, in the treatment with a density of 107 conidium/ml can cause 57% mortality, and at a density of 106 conidium/ml it can cause 48% mortality. This difference in mortality could be due to the high concentration of spores used, thus affecting the existing mortality rate. The results of probit analysis showed that the LT50 value in the conidium density treatment of 108 conidium/ml reached 6.8 days; 107 conidium/ml reached 8.9 days; and 106 conidium/ml reached 11.9 days, with an LC50 value with a conidium density of 108 conidium/ml. The conclusion that can be drawn from this study is that the level of pathogenicity of the fungus B. bassiana infecting L. acuta occurred on the first day after application. Density treatment of 108 conidium/ml was able to cause the highest mortality, namely 72% mortality. The results of probit analysis showed that the fastest LT50 value was found in the treatment with a density of 108 conidium/ml which reached 6.8 days. LC50 is at a value of 7.8 or a concentration with a conidium density of 108 conidium/ml. Keywords : Rice (Oryza sativa L), Leptocorisa acuta, B. bassiana.
POTENSI PENGGUNAAN METIL EUGENOL TERHADAP HAMA LALAT BUAH Bactrocera spp. (DIPTERA : TEPHRITIDAE) PADA TANAMAN LABU SIAM Sechium edule (Jacq) Sw. DI KOTA TOMOHON Chika C. Maarebia; Dantje Tarore; Maxi Lengkong
COCOS Vol. 14 No. 3 (2022): EDISI JULI-SEPTEMBER 2022
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v8i8.37324

Abstract

ABSTRACT One of the subtropical plants that are often found in Indonesia is the chayote plant (Sechium edule (Jacq) Sw., whose fruit is used as food and is a vegetable consumed by the general public. The genus Bactrocera is reported to have 440 species and the family Tephritidae is the largest group of the order Diptera which is an important family because it is economically very detrimental because it acts as the main insect pest. The aim of the study was to determine the effectiveness of the use of methyl eugenol as an attractant against the type and population of the fruit fly Bactrocera spp. (Diptera:Tephritidae) on chayote plants S. edule (Jacq) Sw. in the city of Tomohon. The research was carried out using a survey method using traps at several chayote planting centers. In the experimental plot, three locations were chosen, each location was placed two traps on the east and west, the traps that were installed were traps made of modified mineral water plastic bottles, sprayed curacron insecticide into the trap bottles, cotton rolled with a diameter of approx. two cm were then tied and dropped with two ml of methyl eugenol using a syringe and then hung on the center of the trap bottle, the number of traps from the entire location was six bottles. The results of the research on the types of fruit flies caught in chayote cultivation using methyl eugonal as an attractant were B. dorsalis, B. carambolae, B. umbrosa, B. albistrigata, and B. cucurbitae. The use of methyl eugenol as an attractant was able to catch several types of fruit flies in the Kakaskasen sub-district as many as 478 tails, Talete 1 as many as 290 tails, and Talete 2 as many as 269 tails with a total catch of 1033 tails. Keyword : potential, methyl eugenol, Bactrocera spp, Sechium edule
Co-Authors Avendi Rangkaya Caroulus S. Rante Chika C. Maarebia Daisy S. Kandowangko Dantje Tarore Denny Saroinsong Dewi R. Elhanan B. Kastilong Elisabet. R. M. Meray Fini Natalia Tumewan Henny V.G. Makal Jackson Watung James B. Kaligis Jantje Jantje Pelealu Maningkas, Praise Frena Merlyn Meray Michael A. Lumi Monalisa Debora Setlight Moulwy F. Dien Noni N. Wanta Oddi R Pinontoan Paruntu, Masye B. Paruntu, Meisye H. B. Pinaria, Betsy Agustina Naomi R. Irsan Dj. Hutumoy Ranten, Caroulus S. Reity Engka Sherlij Dumalang