Jurnal Proteksi Tanaman (Journal of Plant Protection)
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Pengaruh Aplikasi Beberapa Jenis Bahan Aktif Insektisida Sintetis terhadap Predator Eocanthecona furcellata (Wolff) di Laboratorium: english
Full text linkApplication of various synthetic insecticides to control fire caterpillar (Setora nitens) on palm oil plantation has negative impact on predator Eocanthecona furcellata, the natural enemy of fire caterpillar. Profenofos, deltamethrin and cypermethrin insecticides have negative effect because they can reduce population of E. furcellata. The research was conducted using contact method with concentration of 2 ml.l-1 and water as a control with 7 days in observation time. Generallly, the result of the research showed that synthetic insecticides have toxicity on E. furcellata. The profenofos had an effect on the total mortality of E. furcellata up to 63.33%, cypermethrin up to 59.99% and deltamethrin up to 53.33%. The female significantly was more tolerant than male. It is necessary to choose suitable insecticide that are not only effective in controlling S. nitens but also safe for natural enemies
Aktivitas Air Rebusan Beberapa Kulit Jeruk (Citrus spp) untuk Menekan Pertumbuhan Colletotrichum gloeosporioides pada Tanaman Buah Naga secara In Vitro: Activity of Orange Peel Decoction (Citrus spp) to Suppress the Growth of Colletotrichum gloeosporioides on Dragon Fruit Plants In vitro
Full text linkPenelitian bertujuan untuk mendapatkan air rebusan kulit jeruk yang efektif dalam menekan pertumbuhan patogen Colletotrichum gloeosporioides penz. & Sacc. penyebab penyakit antraknosa pada tanaman buah naga (Hycoleceurus polyrhizus, L.) secara in vitro. Hasil penelitian diharapkan dapat membantu petani dalam mengendalikan penyakit antraknosa pada tanaman buah naga, serta mampu mempertahankan kualitas dan kuantitas dalam memproduksi buah naga. Penelitian ini dilaksanakan di laboratorium Fitopatologi Fakultas Pertanian Universitas Andalas dengan Rancangan Acak Lengkap, 6 perlakuan dan 5 ulangan. Perlakuannya adalah air rebusan dari beberapa kulit jenis jeruk dengan konsentrasi 5 g/100 ml, diantaranya: A = Tanpa perlakuan (kontrol); B = Kulit jeruk purut (Citrus histrix DC); C = Kulit jeruk manis (Citrus sinensis L.); D = Kulit jeruk nipis (Citrus aurantifolia); E = Kulit jeruk kasturi(Citrus madurensis Lour.) ; F = Pestisida berbahan aktif (tebukonazol, dengan dosis anjuran 2 g/100 ml, sebagai pembanding). Data yang diperoleh dianalisis secara sidik ragam (uji F) dan jika berbeda nyata dilanjutkan dengan (Least Significance Different) LSD pada taraf nyata 5%. Hasil penelitian menunjukkan bahwa dari perlakuan beberapa kulit jeruk dapat menekan pertumbuhan jamur C. gloeosporioides in vitro. Perlakuan air rebusan kulit jeruk manis adalah yang paling baik dengan efektivitas penekanan: luas koloni 76,86%, jumlah konidia 94,58%, dan daya perkecambahan konidia 38,18%. Namun efektivitasnya masih rendah jika dibandingkan dengan penggunaan pestisida berbahan aktif tebukonazol lebih efektif 100%.Colletotrichum gloeosporioides is a pathogenic fungus that attacks dragon fruit plants. This research aimed to obtain effective orange peel decoction in suppressing the growth of C. gloeosporioides that causes anthracnose on dragon fruit plants in vitro. The research was carried out in the Phytopathology Laboratory of the Faculty of Agriculture, Universitas Andalas with a Completely Randomized Design, six treatments, and five replications. The treatment was decoction of several orange peels with a concentration of 5 g / 100 ml (Control, kaffir lime skin (Citrus histrix), sweet orange peel (Citrus sinensis), lime peel (Citrus aurantifolia), castard orange peel (Citrus madurensis), and tebukonazol (synthetic pesticides with a recommended dose of 2 g / 100 ml). The data obtained were analyzed by ANOVA and LSD at 5% significance level. The results showed that the decoction of several orange peels could suppress the growth of C. gloeosporioides. The decoction of sweet orange and lime peel were the highest in reducing the colony area, with the effectiveness of suppression were 76.86% and 73.96%, respectively. Sweet orange peel decoction was most effective in reducing the number of conidia (94.58%). The decoctions of sweet orange, lime peel, and musk orange peels can reduce wet weight, dry weight, and inhibit the germinating rate of C. gloeosporioides
Respon Kutu Putih Pepaya dan Tanaman Pepaya terhadap Aplikasi Asam Salisilat: english
Full text linkSalicylic acid is one of the elicitor substances that can be used to reduce the level of damage of plants, both by pathogen and herbivore. The application of salicylic acid also affects plant growth and productivity. The impact of the salicylic acid application on a plant varies, such as depending on concentration, mode of application, and plant species. This research aimed to know the effect of different salicylic acid concentrations on mealybug development and papaya growth. The results showed that salicylic acid at concentrations of 100 mg/l slowed mealybug development and suppressed the amount of fecundity. Still, it caused a plant to grow smaller relatively. The application of salicylic acid at a concentration of 50 mg/l was the best treatment because it provided the best growth of papaya plants and suppressed the fecundity of mealybug
Uji Beberapa Konsentrasi Ekstrak Akar Tuba (Derris elliptica Benth) untuk Mengendalikan Larva Kumbang Tanduk (Oryctes rhinoceros Linnaeus) pada Tanaman Kelapa Sawit: Test Some Concentrations of Tuba Root Extract (Derris elliptica Benth) to Control Horn Beetle Larvae (Oryctes rhinoceros Linnaeus) on Palm Oil Plant
Full text linkOryctes rhinoceros Linnaeus is one of the main pests of oil palm plants. The Oryctes rhinoceros control of being commonly used is synthetic insecticides. However, it is unwise useable to cause negative impacts on humans and the agricultural environment. Therefore, an alternative insecticide that is safer and environmentally friendly is needed, such as tuba root (Derris elliptica Benth.). The research was conducted in a Plant Pest laboratory, Faculty of Agriculture, University of Riau, Pekanbaru, from July to August 2018. This study aims to obtain an effective concentration of tuba root extract to control Oryctes rhinoceros larvae. The research was conducted experimentally using a Completely Randomized Design (CRD), which consists of five treatments and four replications. The treatment used is the concentration of tuba root extracts 0 g.l-1 of water, 25 g.l-1 of water, 50 g.l-1 of water, 75 g.l-1 of water and 100 g.l-1 of water. The result in them showing that the application of tuba root extract at a concentration of 75 g.l-1 was able to decrease O. rhinoceros larvae population with a total mortality of 82.5%. The lethal concentration to kill 50% of O. rhinoceros larvae population was 1.0% or equal to 10 g.l-1 of tuba root extract, while the lethal concentration to kill 95% of O. rhinoceros larvae population was 30.6% or equal to 306 g.l-1 tuba root extract
Respon Beberapa Varietas Padi Terhadap Serangan Fusarium fujikuroi Penyebab Penyakit Bakanae
Full text linkFusarium fujikuroi is the cause of bakanae disease in rice plants. Level of bakanae disease attack on some rice cultivation land in West Sumatra, especially in Padang Pariaman district is quite high. One effort to suppress the development of F. fujikuroi is by planting resistant varieties. In this study, 15 rice varieties originating Sumatera Barat were used to be tested for their response to F. fujikuroi attack. The purpose of this study was to obtain the varieties with the low attack rate of F. fujikuroi. Parameters observed were number of dead seeds, number of dead seedlings, number of stunted seedlings, number of seeds showing symptoms of Bakanae and total infected seeds. The results of the study indicated that symptoms of F. fujikuroi attack varied which were dead seeds, stunting seedlings, dead seedslings and bakanae. The response of rice varieties to F. fujikuroi attack was different with characterized by different levels of infection rates. Low infection rates were found in Pessel varieties (2.0%), Batang sahalai (15.5%), Cisokan (17.0%), and Batang Lembang (20%). Other varieties showed a high percentage of F. fujikuroi attacks ranging from 20% to 54.5%
Aktifitas Ekstrak Metanol Kulit Buah Manggis (Garcinia mangostana L) terhadap Crocidolomia pavonana Fabricius (Lepidoptera: Crambidae): English
Full text linkCrocidolomia pavonana is an important pest of Brassicaceous which can be controlled by botanical insecticide. The objective of this study was to determine activity of the mangosteen peel fruit (G. mangostana) methanol extract on mortality and development of C. pavonana. The research was conducted at laboratory. The design used was a completely randomized design with four level of methanol extract of the mangosteen peel fruit on larva of 2nd instar. The extract was tested to larvae by a leaf-residue feeding method without selection. The parameters were mortality, antifeedant activity, developmental time, and numbers of pupae C. pavonana formed. The results showed that methanol extract of the mangosteen peel fruit was less effective in controlling C.pavonana. The highest concentration of extract (0.5%) caused mortality 72%, antifeedant activity 55,70%, extended larval developmental time and inhibited numbers of pupae formed of 30,66%
Kemampuan Isolat Rizobakteri sebagai Agens Antagonis Fusarium verticillioides Penyebab Penyakit Busuk Tongkol pada Tanaman Jagung (Zea mays Linnaeus), secara Invitro: english
Full text linkRhizobacteria is an alternative biocontrol of Fusarium verticillioides Sacc. Nirenberg caused ear rot on maize. The aim of this study was to screen rhizobacteria isolates that had ability as antagonist agent against F. verticillioides in vitro. Rhizobacteria was isolated from rhizosphere of healty maize from two villages of West Pasaman. Twenty six rhizobacteria isolates were obtained, then tested for hypersensitive reaction (HR), pectinase enzyme production, initial inhibitory activity, and hemolytic test. Two selected isolates: RBPas1 10-6 1 and RBPas2 10-5 2 could inhibit the growth of F. verticillioides. The inhibitory activity of both isolates were observed with dual culture method, using complete random design (CRD) with 2 treatments and 5 replications, furthermore physiological characterization was conducted. RBPas1 10-6 1 and RBPas2 10-5 2 isolates had the percentage inhibition of micelial growth: 46.16% and 31.30% respectively. Physiological characterization showed that RBPas1 10-6 1 was gram negative with baciliform cells, produced chitinase enzyme, siderophores and fluorescent. RBPas2 10-5 2 was gram positive with bacilliform cells, did not produce chitinase enzyme, siderophores and fluorescent
Preferensi dan Tingkat Serangan Keong Mas (Pomaceae canaliculata Lamarck) terhadap Beberapa Varietas Padi (Oryza sativa Linnaeus): english
Full text linkThe study of preference dan attack level of golden apple snail (Pomaceae canaliculata Lamarck) on several rice varieties was carried out in farmers' paddy fields at Limau Manis, Pauh District, Padang, West Sumatera. The aim of this study was to obtain golden apple snail preferences and its attack level on several rice varieties. The experiments used a Randomized Block Design (RBD) with 8 treatments and 3 blocks. The treatments were several varieties commonly grown in West Sumatera, namely: Cisokan, IR 42, Anak Daro, IR 66, Batang Piaman, Ceredek Merah, Kuriek Kusuik, and Junjuang. The parameters observed were the preference, percentage and intensity of golden apple snail attacks on rice, and rice yield. The results showed that golden apple snail liked all rice varieties, but different varieties affected the preference and attack level. The three most preferred rice varieties by golden apple snail were IR 66, IR 42 and Anak Daro. Meanwhile the three least preferred rice varieties were Kuriek Kusuik, Batang Piaman and Junjuang with a low attack level and a high of yield
Aktivitas Bagian Tumbuhan Sirih Hutan (Piper aduncum Linnaeus) yang Berasal dari Lokasi Berbeda dalam Menekan Pertumbuhan Colletotrichum gloeosporioides secara Invitro: english
Full text linkThe boiled water of Leaves and inflorescences of spiked pepper (Piper aduncum) is one alternative to control the pathogen of anthracnose (Colletotrichum gloeosporioides) in chili. The purpose of this study was to determine the activity of leaves and inflorescences of spiked pepper from different locations in suppressing the growth of C. gloeosporioides in vitro. The research was carried out in Phytopathology Laboratory of Pests and Plant Diseases Department, Faculty of Agriculture, Universitas Andalas from March to May 2017. The study used a Completely Randomized Design (CRD) with 5 treatments and 5 replications. Data from observations were analyzed by ANOVA and LSD at the level of 5%. The parameters observed were the growth of fungal colony area, wet and dry weight, number of conidia/ml of suspension and conidia germination. The results showed that the application of leaves and inflorescences of spiked pepper from different locations could suppress the growth of C. gloeosporioides in chili in vitro. Boiled water of inflorescences of spiked pepper from Bukit Lampu - Bungus - Padang City became the best treatment because it had the highest ability in suppressing C. gloeosporioides colony area with an effective suppression of 73.5% and reducing the highest germination capacity with an effective suppression of 23.28%. Its ability to reduce wet and dry weight were not different from inflorescences boiled water from Limau Manis, then the ability to suppress the number of conidia was not significantly different from leaves and inflorescences boiled water from Bukit Lampu and Limau Manis
Tingkat Serangan Brontispa Longissima (Gestro) (Coleoptera: Chrysomellidae) pada Kelapa (Cocos Nucifera) Varietas Genjah dan Varietas Dalam di Kabupaten Solok: english
Full text linkThe attack of Brontispa longissima has spread to almost all coconut plantations in Indonesia. This study aimed to determine the attack level of B.longissima on dwarf and tall varieties and the number of fruit in Solok Regency. A survey with purposive random sampling was done. The parameters observed were the percentage of plants attacked, the percentage of midribs attacked, and the number of the coconut fruit. The results showed that the highest percentage of coconut attacked by B. longissima occurred on the tall variety (83.34%) in Gunung Talang Subdistrict, the highest percentage of midribs attack occurred on tall variety (12.67%) in X Koto Singkarak Subdistrict. There was a negative close correlation between the percentage of leaves attacked and the number of coconuts