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Revista Facultad Nacional de Agronomía Medellín

Print version ISSN 0304-2847

Abstract

MONTILLA PEREZ, Jimena; LONDONO ZULUAGA, Martha Eugenia; MONSALVE GARCIA, Danilo Augusto  and  CORREA LONDONO, Guillermo Antonio. Evaluation of Insecticides for Monalonion velezangeli, Carvalho & Costa (Hemiptera: Miridae) management in Avocado. Rev. Fac. Nac. Agron. Medellín [online]. 2014, vol.67, n.1, pp.7141-7150. ISSN 0304-2847.  http://dx.doi.org/10.15446/rfnam.v67n1.42604.

The bug monalonion, coclicllo o chupanga (Monalonion velezangeli) generates damage in avocado end buds, affecting the tree development. When the attack is located on the fruit it causes its drying and therefore its rejection. There are no strategies to manage this plague, so producers use insecticides without any evaluation about their effectiveness. In this research, we evaluated insecticides with a novel mode of action on M. velezangeli under controlled conditions. We used a randomized complete block design, with eleven treatments and four replications. The treatment set was composed by deltamethrin, l-cyhalothrin, imidacloprid, thiamethoxam, spinosad, spiromesifen, diflubenzuron, diafentiuron, a mixture of thiamethoxam + l-cyhalothrin; and additionally, a control treatment with water and a control treatment with no application. The experimental unit was a common guava shrub with ten insects confined within a tul cage. Treatments were applied once with the insects inside the cage. Deltamethrin, l-cyhalothrin, thiamethoxam, imidacloprid and the mixture of thiamethoxam + l-cyhalothrin caused mortalities between 85 and 100% on M. velezangeli 24 hours after being applied; three days after application, mortality is 100%. These products can be included in an integrated pest management program for M. velezangeli. Diafenturion caused mortalities between 51 and 81%. No effect of diafenturion, diflubenzuron or spiromesifen was evidenced on exposed adult progeny, but treated nymphs that became adult originated a lesser quantity of nymphs. This effect should be better elucidated.

Keywords : Pyrethroids; neonicotinoids; diafenthiuron; diflubenzuron.

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