01508naa a2200145 a 450000100080000000500110000800800410001910000180006024501310007826000090020950000110021852010330022965000160126277300840127813187141996-06-29       1986    bl uuuu     u00u1 u    #d1 aHEWITT, G. B.  aFatores ambientais que afetam a sobrevivencia de ovos das cigarrinhas-das-pastagens durante a estacao seca, no brasil central.  c1986  aCNPGC.  aSpittlebug egg survival and hatching was compared in pastures where differences occurred in vegetative characteristics and grazing intensity. Egg samples were placed in pastures at the start of the dry season and recovered before hatching began. Significantly (P&lt0,005) more eggs were recovered from areas where litter was present than from bare soil areas. Mortality from predators and  scavengers was estimated at 73%. An addicional 34% of the eggs were desiccated and 35% were nonviabel. Egg survival was estimated to be 8,5% and  was greater im pastures with the following characteristics: 1)canopy height&gt30 cm; 2) abundant litter; 3) plant cover&gt50%; 4) minimal or no grazing. More predators, especially spiders (Araneida) were also collected from these types ofpastures. At onesite more eggs hatched in a high grass pasture (74%) than in a low grass pasture (59%). Although high grass may receive  less damage from spittlebug  feeding the disadvantages of maintaining grass&gt30 cmappear to outweigh the advantages.  aEntomologia  tPesquisa Agropecuaria Brasileira, Brasiliagv.21, n.12, p.1237-1243, dez. 1986.