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KEEFEKTIFAN BEBERAPA FUNGI ANTAGONIS (Trichoderma sp) DALAM BIOFUNGISIDA ENDOHEVEA TERHADAP PENYAKIT JAMUR AKAR PUTIH (Rigidoporus microporus) DI LAPANGAN

Jurnal Penelitian Karet JPK : Volume 32, Nomor 2, Tahun 2014
Publisher : Pusat Penelitian Karet - PT. Riset Perkebunan Nusantara

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Abstract

Penyakit jamur akar putih (JAP) yang disebabkan oleh Rigidoporus microporus menimbulkan kerugian ekonomi yang tinggi di perkebunan karet hingga Rp. 1,8 triliun/tahun. Penyakit ini menyerang semua stadia tanaman karet baik di pembibitan, kebun entres, TBM maupun TM. Saat ini pengendalian jamur akar putih masih menggunakan fungisida kimia berbahan aktif seperti heksakonazol, tridemorf, dan triadimefon. Pengendalian dengan fungisida kimia lebih mahal bila dibandingkan dengan biofungisida, selain itu tidak bersifat ramah lingkungan. Suatu kemajuan ditunjukkan oleh beberapa perkebunan yang telah mengadopsi penggunaan biofungisida. Endohevea merupakan salah satu biofungisida yang dapat mengendalikan JAP. Biofungisida ini terdiri atas beberapa fungi yang tergolong ke dalam genus Trichoderma yang bersifat antagonis terhadap JAP. Keefektifan biofungisida Endohevea diketahui dengan penyiraman biofungisida secara langsung ke pangkal batang tanaman yang terserang dengan skala serangan beragam (skala 1, 2, atau 3) dengan perlakuan banyaknya aplikasi (1 kali aplikasi dan 2 kali aplikasi) dan perlakuan dosis (1 tablet/liter air/tanaman dan 1 tablet/5 liter air/5 tanaman) dan kontrol (tanpa aplikasi). Parameter pengamatan yang diuji adalah persentase kesembuhan. Keefektifan dilakukan setiap bulan setelah aplikasi pertama dengan parameter persentase kesembuhan. Hasil menunjukkan bahwa biofungisida Endohevea pada dosis 1 tablet/5 tanaman efektif dalam mengendalikan JAP pada skala lapangan dengan persentase kesembuhan mencapai 79,0% yang signifikan berbeda dibandingkan kontrol. Diterima : 10 Januari 2014; Direvisi : 28 Februari 2014; Disetujui : 20 April 2014  How to Cite : Fairuzah, Z., Dalimunthe, C. I., Karyudi., Suryaman, S., & Widhayati, W. (2014). Keefektifan beberapa fungi antagonis (Trichoderma sp) dalam biofungisida endohevea terhadap penyakit jamur akar putih (Rigidoporus microporus) di lapangan. Jurnal Penelitian Karet, 32(2), 122-128. Retrieved from http://ejournal.puslitkaret.co.id/index.php/jpk/article/view/158

Effect of foliar fertilizer application on yield, and yield components of tea (Camellia sinensis Var. Assamica (Mast.) Kitamura)

Jurnal Penelitian Teh dan Kina Vol 17, No 2 (2014)
Publisher : Research Institute for Tea and Cinchona

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Abstract

The experiment on the effect of foliar fertilizer (29% N, 10% P2O5, 10% K2O, 3% MgO, 5% SO3, and micro compound B, 0,0075% Cu, 0,026% Fe, 0,032% Mn and 0,023% Zn) concentration on growing tea (Camellia sinensis) and productivity was con­ducted in Research Institute for Tea and Cin­chona Experimental Plantation on the altitude of 1.350 m above sea level and Andisol type soilfrom August to November 2013 with GMB 7 clones. The experiment was arranged in a randomized block design with 3 treatments and 4 replicates. Concentration levels of fertilizer were 1) 0% as control, 2) 2%, and 3) 4%. The results showed that productivity increased significantly, control (465,25 g/10 plantation) compared with the plants were treated with 2% (564,58 g/10 plantation) and 4% (573,46 g/10 plantation) fertilizer, respectively. The increase of productivity was due to increased of plucking point, quantity and weight of pecco and length of leaves. 

Foliar Fertilizer and Pesticide Methomyl 25% in Tea Plantation after Infested by Pest. (1) Effect of Productivity Increasing and Yield Components

Jurnal Penelitian Teh dan Kina Vol 18, No 1 (2015)
Publisher : Research Institute for Tea and Cinchona

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Abstract

The experiment of effect of Foliar Fertilizer (N& ZnSo4) and pesticide compatibility with Methomyl 25% compound to increasing Tea Productivity (Camellia sinensis) has been conducted in Research Institute for Tea and Chincona experimental plantation1350 m above sea level and andysol type soil. The experiment started from November 2013 – Februari 2014  in produced tea area with 1.080 plant population. Material plantswere GMB 4 clones with second pruning year and 12 days plucking interval. The experiment was arranged on randomized block design with 9 treatments and 3 replicate. Foliar fertilizer and pesticide combination which has been examined  were  (1) Methomyl 25% (control), (2) Methomyl 25% + Zn 1%, (3) Methomyl 25% + Zn 2%, (4) Methomyl 25% + N 1%, (5) Methomyl 25% + N 2%, (6) Methomyl 25% + N 1% + Zn 1%, (7) Methomyl 25% + N 1% + Zn 2%, (8) Methomyl25% + N 2% + Zn 1%and (9) Methomyl25% + N 2% + Zn 2. Spraying application done every after plucking. The results  showed that skiffing treatment can control the tea plantation that infested by pest and stimulate the new bud growth. The results  also showed that productivity increased significantly up to37, 48 % (2.781 gr/40 plants) when the plants were treated with Methomyl + N 1% + Zn 2%.But,the increased production is accompanied by an increase of banjhi because plant still using their nutrition to recovering after pest infested. The weight of pecco which grown from the  lateral buds is relatively small because of skiffing. Bud growth rate after given treatment was obtained only 3-4 cm/ 6 days caused by lack of light intensity at the time of reserached