Abstract

VALLE RAMIREZ, Segundo et al. Evaluation of two methods for monitoring Mahanarva andigena Jacobi in the sugarcane (Saccharum spp. hybrid) crop in the province of Pastaza, Ecuador. Rev. Protección Veg. [online]. 2015, vol.30, n.3, pp. 185-192. ISSN 2224-4697.

The objective of this work was to evaluate the effectiveness of two methods for monitoring Mahanarva andigena Jacobi from the biological and economic point of view under the conditions of Pastaza Province. Four representative communities of the province were selected for their higher surface in production of sugarcane (Saccharum spp.) variety POJ 93 (Limeña). A crop hectare was selected in each of three farms randomly selected in each of the communities. M. andigena populations were monitored by using two methods, direct counting of insects and yellow sticky traps, from December 2012 to August 2013, with intervals of ten days. The density of adults obtained by the direct counting showed a progressive increment from February with a maximum value above the economic threshold in March and April, and then it tended to decrease until the last assessment. The method yellow sticky traps showed a high variation among the several assessments and the economic threshold was never reached during the period studied. From the biological point of view, the direct counting of M. andigena populations was the most appropriate method since it provided reliable information, recorded the population data of the nymphal and adult (male and female) insect pest stages, and additionally, it was the most economic.

Keywords : monitoring methods; Mahanarva andigena.

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