Syarief, Mochamad
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Arthropods Diversity and Population Dynamic of Helopeltis antonii Sign. (Hemiptera: Miridae) on Various Cocoa Agroecosystems Management Syarief, Mochamad; Mudjiono, Gatot; Abadi, A. Latief; Himawan, Toto
AGRIVITA, Journal of Agricultural Science Vol 40, No 2 (2018): JUNE
Publisher : Faculty of Agriculture University of Brawijaya in collaboration with PERAGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17503/agrivita.v39i2.1038

Abstract

As an important pest, Helopeltis Antonii reduces cocoa yields ca. 32-44 %. Related to H. antonii, this research aimed to identify the arthropods diversity, population and attack intensity of H. antonii in three different managements of cocoa plantations i.e. Kedaton, Banjarsari and Nogosari, Jember district, East Java, Indonesia from February 2014 to February 2015. The arthropod collection was done by visually, sweep net, yellow pan, malaise and pitfall traps. Arthropods diversity and similarity were analyzed by Margalef species richness index (R), Shannon-Wiener diversity index (H?), Evenness index (E), Simpson dominance index (C) and Sorensen Similarity index (SS). The different number of arthropod, population and attack intensity of H. antonii between plantations were examined by Wilcoxon test. The research showed that the highest species richness, diversity and evenness index values was in Nogosari and it was in a stable condition. About 10 orders, 35 families and 41 species of arthropods in Nogosari, it was higher than two other cocoa plantations. Nogosari was different from Kedaton and Banjarsari based on Sorensen Similarity Index with 78.26 and 77.78 % respectively. In addition, population dynamic and attack intensity of H. antonii in the three cocoa plantations were different in a year.
Efikasi Ekstrak Daun Kemangi (Ocimum basilicum) Terhadap Penyakit Bercak Daun (Cercospora arachidicola) Pada Tanaman Kacang Tanah Meliyana, Rosita; Wardana, Rudi; Syarief, Mochamad
Agriprima, Journal of Applied Agricultural Sciences Vol 3, No 1 (2019): MARET
Publisher : Politeknik Negeri Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25047/agriprima.v3i1.143

Abstract

Cercospora arachidicola merupakan patogen yang menyebabkan penyakit bercak daun pada tanaman kacang tanah. Serangan penyakit bercak daun pada tanaman kacang tanah dapat menurunkan hasil akibat patogen yang menyerang pada saat pengisian polong. Penggunaan pestisida sintetik dalam pengendalian penyakit tanaman dapat menimbulkan efek residu yang membahayakan lingkungan. Untuk mengurangi dampak negatif tersebut diperlukan upaya perlindungan tanaman dengan penggunaan pestisida nabati. Penelitian ini bertujuan untuk mengetahui efikasi ekstrak daun kemangi terhadap penyakit bercak daun (Cercospora arachidicola) pada tanaman kacang tanah. Penelitian ini dilaksanakan pada November 2017 sampai Februari 2018 di lahan percobaan Desa Baratan, Kecamatan Patrang, Kabupaten Jember dan laboratorium perlindungan tanaman Politeknik Negeri Jember. Penelitian mengunakan rancangan acak kelompok (RAK) non faktorial 5 perlakuan dengan (P0) fungisida sintetik 1 ml/liter, ekstrak daun kemangi 25 % (P1), ekstrak daun kemangi 50% (P2), ekstrak daun kemangi 75 % (P3), dan ekstrak daun kemangi 100 % (P4) . Hasil uji anova pada penelitian menunjukkan bahwa efikasi ekstrak daun kemangi (Ocimum basilicum) terhadap penyakit bercak daun (Cercospora arachidicola) pada tanaman kacang tanah tidak berbeda nyata pada parameter intensitas serangan, jumlah polong, berat basah polong, dan berat kering polong kacang tanah. Peningkatan serangan Cercospora arachidicola berdampak dalam pengurangan hasil panen kacang tanah pada uji korelasi.