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The aim of this study was to determine the damage caused by adult  Mahanarva spectabilis  (Distant, 1909) (Hemiptera: Cercopidae) on  Brachiaria ruziziensis  (Germain & Evard) under field conditions. A total of 0, 4, 8, 12, or 16  M. spectabilis  adults per plot were maintained for 6 days. Thereafter, the insects were removed from the plant, and the following parameters were evaluated: chlorophyll content, damage score, dry as well as fresh weights, percentage of shoots' dry matter, and the forage's ability to regrow. The chlorophyll content was significantly reduced; the damage score and percentage of dry matter in plants increased depending on the increased insect infestation density after 6 days of exposure. In contrast, no change was observed on the  B. ruziziensis  fresh and dry weights as well as the regrowth capacity depending on the  M. spectabilis  infestation densities. Attacks by 8 adult  M. spectabilis  per clump of  B. ruziziensis  with an average of 80 tillers for 6 days were sufficient to reduce the chlorophyll content and the functional plant loss index. This density can be a reference for spittlebug integrated management in  Brachiaria .

The Damage Capacity ofMahanarva spectabilis(Distant, 1909) (Hemiptera: Cercopidae) Adults onBrachiaria ruziziensisPasture