Abstract

SALAS, Jorge. Plantas cultivadas y silvestres hospederas de thrips tabaci y thrips palmi (thysanoptera:thripidae) en quíbor, estado lara, Venezuela. Bioagro [online]. 2003, vol.15, n.1, pp.47-54. ISSN 1316-3361.

The presence of the bean yellow trips Thrips palmi Karny, and the onion thrips Thrips tabaci Lindeman (Thysanoptera: Thripidae) on different cultivated and wild plants in rainy and dry seasons was recorded in several places of Quíbor valley, Lara State, Venezuela. Adults of T. palmi and T. tabaci were identified using pictorial keys. Plants also were identified using pictorial keys and with the advice of plant specialists of Botany Department, Universidad Centroccidental "Lisandro Alvarado". Cultivated plants showing larger number of thrips in the raing season were pigeon pea (Cajanus cajan), followed onion (Allium cepa), leucaena (Leucaena leucocephala) and beil pepper (Capsicum annuum). In the dry season, the same plants remained as main hosts although thrips populations were higher. Among wild plants, the main hosts were Amaranthus dubius, A. retroflexus, Salsola iberica, Cucumis dipsacens, Eclipta alba, Argemone mexicana and Septaria geniculata in both rainy and dry season. T. palmi had a more ample range of host plants than T. tabaci. It is important to emphasize that few wild plants (weeds) host T. tabaci and many of them host T. palmi . Also T. palmi was found in tomato but not in onion, while T. tabaci was not found in tomato. The above information might be of great value to design 1PM programs of these two insect pests, especially related to control of host plants and biological control

Keywords : Vegetable crops; weeds; Thysanoptera,; host plants.