Aspectos alimentares e de criação de Bradysia hygida Sauaia & Alves (Diptera, Sciaridae) em laboratório

Abstract

ABSTRACT. ASPECfS ON ALIMENTATION ANO REARING OF BRADYSIA HYGIDA SAUAIA & ALVES (DIPTERA, SCIARlDAE) lN • LABORATORY. ln nature, the Sciaridae live in moist and shady places, where exists vegetable material in decomposition . It is very dificult to determine the proper Sciaridae's alimentary habit and then , it is dificult, also, to rear Sciaridae species in laboratory. To improvement the Bradysia hygida rearing, the objectives of this research were to analyse the nutritive value of mucuna bean foliage for the larves, to verifythe role ofthe ground (as larvae substrate and in dietcomposition) and also to verify the possibility of ground substitui tion by another kind of substrate. Two kinds of sand were employed in the place of the ground and three diets, free of ground, were prepared. The parameters analysed were: duration of the life cicie, porcentage of emergence, egg production by female and adult size. The results showed that the mucuna bean foliage have a good nutritive value for B. hygida rearing; the ground, as substrate, can be substituted by any of the sands and the ground, in the diet, is also dispensable. The alimentary habits of Sciaridae is discussed.

Fungus Gnats, Bradysia spp. (Diptera: Sciaridae), and Other Arthropods in Commercial Bagged Soilless Growing Media and Rooted Plant Plugs

“…Adults live about 2 to three days and females lay 30 to 70 eggs beneath the soil gowing media substrate. The larvae have four instars with a lifecycle of 21 days (Harris et al 1995) depending on the temperature, substrate and host plant (Bravo et al 1993). The fungus gnat B. difformis is often found in greenhouses where it can become a pest.…”