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Predation as a Mortality Factor in Populations of the Spittlebug, Deois flavopicta Stål (Homoptera: Cercopidae) Neotropical Entomology
SUJII,EDISON R.; GARCIA,MARIA A.; FONTES,ELIANA M.G.; O'NEIL,ROBERT J..
The spittlebug, Deois flavopicta Stål, is the main pest in cultivated pastures of the "Cerrados" (savanna) in the central region of Brazil. The insect has three discrete generations during the rainy season (September-April) and a synchronized population of diapausing eggs during the dry season (May-August). Experiments in cultivated pastures showed that nonspecific predators were able to affect significantly the mortality rates of diapausing eggs and nymphs of D. flavopicta. Predation was a density independent mortality factor that reduced diapausing eggs by approximately 60% and nymphs by 20% to 47%. The nymph mortality rate due to predation did not differ during the first and the second generations of the year. For the third generation however, the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Insecta; Insect community; Population dynamics; Survival curve.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2002000400010
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