Tabela de vida dinâmica e testes de repelência para Nauphoeta cinerea (Olivier, 1789)

Abstract

Life tables are used to describe and understand population structure and dynamics. The Nauphoeta cinerea cockroach is one of the species used as an alternative model in substitution in mammal tests, as it has high reproductive capacity, short life cycle and ease of maintenance. The objective was to describe some population attributes, from data obtained with the dynamic life table and, to carry out repellency tests using plant extracts of four species: Cymbopogon nardus, Allium sativum, Laurus nobilis and Lavandula dentata. The dynamic life table was built in the laboratory, with a cohort of 27 individuals, counted and fed weekly. For the repellency tests, three individuals were used, two marked with water-based liquid concealer (New Magic®), one with blue paint and one with red paint over the concealer, and the third without marking. They were kept in a plastic box, with a sombrite lid, the bottom of the box was divided into numbered quadrants, with food and water ad libitum, and followed for a period of two hours, during the period of greatest activity of the species. Vegetable extracts were used in the extreme corner of one of the quadrants. The results obtained through the life table indicated that N. cinerea has higher initial survival rates, high biotic potential and continuous development in favorable breeding conditions. For the repellency tests, the plant extracts showed to be functional in the repellency of N. cinerea, however the form of preparation of the vegetable showed to be determinant in the efficiency and the essential oils, as well as the aqueous extract presented better results.