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Uji Beberapa Konsentrasi Ekstrak Tembakau Lintinguntuk Mengendalikan Ulat Penggerek Polong Marucatestulalis Geyer) Pada Tanaman Kacang Panjang (Vignasinensis L.)
Long bean pod borer, Maruca testulalis Geyer (Lepidoptera: Pyralidae) is a major pest on long bean plants. These pests are polyfagus which has many host plants. The alternative control that can be use to minimize the application of chemical pesticides is an extract of rolled tobacco (Nicotiana tabacum). The research was conducted at the Plant Pests Laboratory, Faculty of Agriculture, University of Riau from Januari 2013 until April 2013. This research used completely randomized design (CRD), with 5 treatments and 4 replications. The treatments are concentrations of extract rolled tobacco, 0 g/l of water, 0,5 g/l of water, 1 g/l of water, 1,5 g/l of water and 2 g/l of water. The result showed that the concentration of extract rolled tobacco 2 g/l of water is suitable for controlling long bean pod borer (Maruca testulalis Geyer). The percentage of total mortality is 82,50 % and cause 50% mortality within 10,75 hours.
Key words : Long bean pod borer (Maruca testulalis Geyer), Long Beans (Vigna sinensis L), Extract rolled tobacco (Nicotiana tabacum).
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