RESPON APLIKASI KONSENTRASI DAN INTENSITAS BIOSIDA DAUN SIRSAT DALAM PENGENDALIAN KUTU DAUN SAWI Aphis brassicae (Hemiptera: Aphididae

Abstract

The study entitled the response to the concentration and intensity of biocides (soursop leaves) in the control of mustard aphids. The aims of this study were: 1) to determine the effect of the concentration of biocides (soursop leaf) on the attack of mustard aphids, 2) to determine the effect of the intensity of the application of vegetable pesticides (soursop leaves) on the attack of mustard aphids, 3) to determine the interaction between concentrations with the intensity of biocides (soursop leaves) against mustard aphids attack. The experiment was carried out using a completely randomized design (CRD), which was arranged in a factorial manner, consisting of two factors and repeated three (3) times. The first factor is the concentration of soursop leaf biocide, consisting of three (3) levels: (1) K1 = 25 ml/L, (2) K2 = 50 ml/L, (3) K3 = 75 ml/L. The second factor is the intensity of soursop leaf biocide application (I), consisting of two (3) levels: (1) I1 = one application, (2) I2 = two applications, (3) I3 = three applications.The results of the study are as follows: 1). There was an interaction between concentration and intensity of soursop leaf biocide on the percentage of leaf damage at 13 DAP and the percentage of live pests at 11, 13, 15 and 17 DAP, 2). the concentration of biocides (soursop leaves) was significantly different at the variable height of plants at 21 DAP, the percentage of leaf damage at 9, 11, 15, and 17 DAP, the percentage of live pests at 9 DAP, 3) The intensity of application of soursop leaf biocides was significantly different in observations. percentage of leaf damage at the age of 15, and 17 DAP