Resumen

CASTELLANO, Glady et al. Control of stylar end rot and plant wilting by integrated pest management in guava (Psidium guajava L. ). Bioagro [online]. 2003, vol.15, n.2, pp.135-142. ISSN 1316-3361.

The guava is an important crop in Zulia State, Venezuela: However, its low yields may be attributed to management reasons. In this paper, an integrated management was evaluated to control nematodes and pathogens causing stylar end rot as compared to the traditional farm management. The integrated management involved chemical control of pathogens along with complementary cultural practices. The experiment was conducted in 52 eight-year old trees planted at 8 x 8 m. Such trees showed high nematode and high stylar end rot incidence. Integrated management was applied to 26 trees, leaving 26 with traditional management (control). Stylar-end rot incidence, galls nematode index, nematode population (j₂/cm³ of soil) and yield (number and weight of fruits) were evaluated and statistical t test was applied. Results showed that integrated management decreased Botryodiplodia and Dothiorella frequency, as well as young nematode population (j₂/cm³ soil). However nematode frequency remained. Higher yields were obtained under integrated management in the two evaluation years. It is advisable to apply an integrated management system for pathogen control, and chemical control where pathogen incidence is high.

Palabras clave : Integrated pest management; nematodes; gall nematode index; Zulia State.