Effectivity of Three Botanical Crude Extracts on Immature of Whitefly (Bemisia Tabaci Genn.) Under Enclosure Conditions

Abstract

Pest management of habanero chili (Capsicum chinense Jacq., Solanaceae) the sweetpotato whitefly Bemisia tabaci Genn. (Hemyptera: Aleyrodidae) is a key plague insect as a virus-vector, capable of causing serious economic loss. Their control is broadly based on Imidacloprid, a neonicotinoids product. B. tabaci have resistance to imidacloprid now. Some plants extracts are suggest in the literature how insect repellent properties over whiteflies, including allspice [Pimenta dioca (L.) Merrill, (Myrtaceae)], sweet basil [Ocimun basilicum L. (Lamiaceae)] and wild feverfew [Parthenium hysterophorus L.(Asteraceae)]. The preliminary screening under controlled conditions for evaluating the repellent effect of crude aqueous extracts, in a 1:1 ratio based on mass weight foliage moisture; was evaluate for each one of above-mentioned plants, against nymphs and eggs of whitefly. Results show that basil and feverfew extracts was significantly effective in preventing oviposition by adult whiteflies on habanero chili foliage, with allspice showing the lowest effect. Fields studies have to be carried out in this regards.