author(s)
Olaniran Oladele Abiodun, Alao Fatai Olaitan, Yusuf Saidat Yetunde and Adebayo Timothy Abiodun

abstract
Control of major insect pests of crops with plant based insecticides has been widely considered as another source of environmental protection. These experiments were conducted during the major planting season of 2015 and 2016 to evaluate the efficacy of Petiveria alliacea (L.)and Annona squamosa (L.) in the control of Podagrica sjostedti (J.) and P. uniformis (J.) which are the major leave feeding beetles of Roselle. The plant materials were extracted with Ethanol and the paste was formulated with black Soap, Texapol, Nitrosol and Salt. This field experiment was set up in a randomized complete block design and each treatment was replicated three times. Application of the plant extracts was done early in the morning. Data collection was based on insect population densities, defoliated leaves and calyx yield. The result showed that the tested plant extracts had significant control of the observed insects when compared with the level of insect infestations in the untreated plants. A. squamosa leaves had the same insecticidal efficacy with the seeds against the studied insects. The calyx yield obtained from botanical insecticide treated plants was 50% higher than that of treated plants but 25% lower than that of Lambdachyalothrin sprayed plants. Therefore, the two plant extracts can be used in the management of insect pests of roselle in organic farming system