Efficacy of Stamina 50 (Thiocyclam hydrogenoxalate) on Coelaenomenodera elaeidis (Coleoptera – Chrysomelidae – Hispinae) in Okomu oil palm plantation, Nigeria

Abstract

Efficacy of Stamina 50, Thiocyclam hydrogenoxalate was evaluated for its bio-insecticidal control on Coelaenomenodera elaeidis larvae, pupae and adult forms, at Okomu oil palm plantation, Nigeria. The experimental plot was 10.2Ha compared with similar untreated plot. Observations were made for 4 weeks after treatment, for dead leaf miner populations. Data were subjected to one way analysis of variance, independent sample T-test and testing for significant difference on the effect of insecticidal treatment on leaf miner populations. Results indicated that exposure to the insecticide at 500g per Kg induced high mortality against the leaf miner. The highest population of dead leaf miner external adult was observed one day after treatment. Total percentage mortality of leaf miner was 89.13% (treatment) and 28.40% (control) indicating effective control. Spot application of stamina 50 was selective on leaf miner and is therefore recommended as a control measure for the leaf miner in Nigeria.