Resumen

GONCALVES, Wallace  y  FARIA, Ana Maria. Granular systemic insecticides for cicada mobile nymphs and their effects on coffee yield. Bragantia [online]. 1989, vol.48, n.1, pp. 95-108. ISSN 0006-8705.  http://dx.doi.org/10.1590/S0006-87051989000100009.

The present research was conducted to evaluate the efficiency and yield increase by granular systemic insecticides to control cicades, mostly Quesada gigas, in two infested coffee plantations: one grown in sandy and the other in clay soils in the State of São Paulo, Brasil. The active ingredients tested were aldicarbe, at 10%, carbofurã, at 5% and dissulfotom, at 2.5 and 10%, applied once in dosages normally used for coffee leaf miner control. An average reduction of 67.5% on mobile nymphs population was observed in the sandy soil and 54.1% in the clay soil plantations. The effect of the above treatments on productivity of coffee was tested over a four year period (1981-1985), and the percent yield increase was on the average: 175, 227 and 246% from aldicarbe, carbofurã and dissulfotom, respectively.

Palabras llave : coffee; cicades; Quesada gigas; systemic insecticides; productivity.