Journal of Economic Entomology (1995) 88, 1256-1262

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Eliana G. Fontes, Carmen S.S. Pires and Edison R. Sujii (1995)
Mixed risk-spreading strategies and the population dynamics of a Brazilian pasture pest, Deois flavopicta (Homoptera: Cercopidae)
Journal of Economic Entomology 88 (5), 1256-1262
Abstract: Deois flavopicta (Stål) is a predominant species of grass-feeding spittlebug in Central Brazil. The climate in this region is a humid/dry cycle with year-long mild temperatures. We investigated the population dynamics, diapause, and voltinism of this insect. D. flavopicta has 3 population peaks during the rainy season, and it diapauses in the egg stage during the dry season. The proportion of offspring entering diapause varies, with few or no diapausing eggs in the beginning of the rainy season and up to 100% eggs in diapause by the season end. Diapausing eggs hatched in 61-360 d. Fifty-two percent of the eggs, however, end diapause in September and October, the most probable period for the 1st heavy rains of the season. High local populations of D. flavopicta may severely damage a host plant, making it unsuitable for the development of future generations of the insect. Apparently, this species migrates to other feeding sites when faced with low nutritional quality food.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): Edison R. Sujii, Carmen S.S. Pires, Eliana M.G. Fontes

Research topic(s) for pests/diseases/weeds:
population dynamics/ epidemiology
general biology - morphology - evolution

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Deois flavopicta Grasses/turf/rangeland Brazil (south)