Efikasi Pestisida Biorasional Untuk Mengendalikan Thrips Palmi Karny Pada Tanaman Kentang

. Suryaningsih, E. 2008 . The Efficacy of Biorational Pesticides to Control ontrol Thrips palmi Karny on Potato Plant . In order to investigate an alternative pesticide, namely biorational pesticides, field experiment was conducted at Margahayu Research Station (elevation 1,250 m asl), Lembang, West Java, from October 2001 until January 2002. The treatments was laid in a randomized block design, with 3 replications. The treatments were biorational pesticides Phrogonal 866, 666, 466, Phronical 826, 626, 426, 846, 646, 446, Agonal 866, and syntetic pesticides Deltamethrin 2.5 EC. The results of the experiment showed that all of the biorationals tested were found to be as effective as Deltamethrin 2.5 EC (0.25%) in controlling T. palmi on potato. However, biorationals consisting A. indica, T. candida, and N. tabacum in higher portion gave higher efficacy compared with synthetic insecticide Deltamethrin 2.5 EC. The results of this experiment were in line with the results of other biorational pesticide experiments, which was strongly gave indication that biorational pesticides derived from plants would be able to replace synthetic pesticides in controlling T. palmi, and to reduce the quantity of synthetic pesticide application on potato cultivation