Meidiwarman Murdan
Fakultas Pertanian Universitas Mataram

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UJI JUMLAH INVESTASI ULAT GRAYAK (Spodoptera sp.) TERHADAP INTENSITAS SERANGAN DAN HASIL PRODUKSI TEMBAKAU VIRGINIA Mardi Johanh; Meidiwarman Murdan
CROP AGRO, Scientific Journal of Agronomy Vol 9 No 2 (2016): jurnal Crop Agro Januari 2016
Publisher : Department of Agronomy Faculty of Agriculture University of Mataram and Indonesian Society of Agronomy Branch NTB

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Abstract

ABSTRAK Tembakau Virginia (Nicotiana tabacum L.) adalah tanaman industri dengan nilai perekonomian yang cukup tinggi di Indonesia. Secara langsung tembakau merupakan sumber pendapatan petaninya cukup besar dan secara tidak langsung dapat menunjang penyerapan tenaga kerja dan sumber pemasukan negara melalui cukaiprodukrokok. Namun dalam budidaya tembakau sangat banyak gangguan dari hama, salah satunya adalah gangguan hama Spodoptera sp. Oleh karena itu penelitian ini bertujuan untuk mengetahui pengaruh jumlah investasi ulat grayak (Spodoptera sp.) terhadap intensitas serangan dan hasil tembakau Virginia. Penelitian ini menggunakan metode eksperimental dengan Rancangan Acak Kelompok dengan lima perlakuan investasi ulat grayak termasuk kontrol, yaitu: H0 (tanpa investasi ulat grayak), H1 (investasi satu ekor ulat grayak), H2 (investasi dua ekor ulat grayak), H3 (investasi tiga ekor ulat grayak) dan H4 (investasi empat ekor ulat grayak). Berdasarkan hasil anlisis regresi sederhana, maka dapat diketahui: (1) Semakin tinggi jumlah investasi ulat grayak pada tanaman tembakau, maka intensitas serangan juga semakin tinggi. (2) Semakin tinggi jumlah investasi ulat grayak pada tanaman tembakau, maka berat brangkasan basah dan kering tanaman tembakau semakin rendah. (3) Semakin tinggi intensitas serangan ulat grayak pada tanaman tembakau, maka berat brangkasan basah dan kering tanaman tembakau semakin rendah. ABSTRACT Virginia tobacco (Nicotiana tabacum L.) is one of industrial plant. This plant has high economic value in Indonesia. Tobacco take a role a source of marmers income in Indonesia. In fact, productionof tobacco is depend on many factors such as pest. The most pest attack tobacco is Spdoptera sp. To undestandthe effect of pest attack mainly Spodoptera sp., it was conducted a research in which to determine the effect of the amount of investment armyworm (Spodoptera sp.) to the intensity of the attack and the result of Virginia tobacco. This research used experimental method with a rendomized block design with five treatments investment armyworms including controls, namely: H0 (without investment armyworm), H1 (investment of the tail armyworm), H2 (investment two male armyworm), H3 (investment three tail armyworm), and H4 (investment four head armyworm). Based on the results of the simple regression analysis, it can be seen: (1) the higher the amount of investment armyworm in tobacco plants, the intensity of the attacks is also higher. (2) the higher the amount of investment in tobacco plants armyworm, then the higher of the wet and dry stover lower tobacco plants. (3) the higher the intensity of armyworm in tobacco plants, then the weight of the wet and dry stover lower tobacco plants.