F82

The objective of the experiment was to determine the efficacy of five commercially available insecticides against SBA on soybean. The experiment was conducted in a farmer’s field in Kecamatan Galesong, Takalar Disrict, South Sulawesi Province, Indonesia. Soybean cv. ‘Mahameru’ seeds were manually planted using a wooden drill with planting space of 28 inches between rows and 10 inches within a row on 5 Jul 2011. The insecticide treatments and an untreated check were arranged in an RCB design with four replications. Each replication consisted of a plot of 8 plant rows wide and 33 ft long. There was 10 ft of bare space between plots. Cultural practices, such as fertilizing and watering, were in accordance with the local recommendations. Insecticides were applied on 10 Aug using a backpack sprayer delivering about 50 gpa. To determine aphid population levels, five plants in the middle two rows of each plot were randomly selected. Numbers of aphids per plant were counted on 17, 24 and 31 Aug and 7 Sep 7. The aphid counts were transformed using log10(x+1) before they were subjected to ANOVA procedures. When a significant difference among treatments was detected, average transformed number of aphids per plant were separated using Fisher’s LSD Test (P=0.05).