Resumen

MUJICA, Yonaisy; MARTINEZ, María de los A; ALEMAN, J  y  RAVELO, Jennifer. Population range of cabbage (Brassica oleracea) pests and other natural enemies in two agroecosystems. cultrop [online]. 2009, vol.30, n.4, pp. 00-00. ISSN 1819-4087.

Cabbage constitutes one of the most important vegetable crops all over the world. This research work was aimed at identifying the essential insect pests affecting cabbage (Brassica oleracea var. Capitata) and other natural enemies, by studying population performance of the main insects and control choices at the areas from the National Centre of Animal and Plant Health (CENSA). Thus, two fields were selected: one intercropped with cabbage and corn, certain weed levels and sunflower plants, whereas another one including mustard (Brassica sp.) between bordering weeds. A randomized block design with fixed plants was followed. Samples were counted and identified in the laboratory, Lipaphis erysimi and Plutella xylostella being the main pest-causing organisms (OCP). Lipaphis erysimi was parasitized by Diaeretiella rapae. Aphid populations increased up to a top at mid-cycle and then it started to decrease, meanwhile parasitoids were detected at mid-cycle and kept a tendency to increase. Population levels of Plutella xylostella were very low, but there were white flies and other OCP. Population levels of aphids and other OCP were lower in the field no. 1, which proves the positive effect of using border areas and intercroppings in these populations.

Palabras clave : cabbage; Brassica oleracea; pests of plants; population dynamics; natural enemies.

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