02017naa a2200385 a 450000100080000000500110000800800410001910000190006024500910007926000090017050001420017952008630032165000110118465000150119565000090121065000150121965000130123465000150124765000250126265000290128765000210131665000160133765000080135365000130136165000210137465300130139565300230140865300120143165300160144370000200145970000200147970000200149970000190151977300930153813197692019-10-28       1985    bl uuuu     u00u1 u    #d1 aNILAKHE, S. S.  aSpittlebug eggsbcomparison of sampling efficiency of sample units of different sizes.  c1985  aTítulo em português: Ovos de cigarrinhas-das-pastagens: comparação de eficiência de amostragem em relação ao tamanho das amostras.  aThe sampling efficiency of three sample units was compared to determine spittlebug egg densities in pastures of Brachiaria decumbens Stapf. To obtain the same level of precision, the  total pasture area to be examined increased by 1,5 times when size of the sample unit was increased from  75 to 150 cm2, and by 2,5 times when it was increased to 225 cim2. Using the 75 cm2 unit, the number of samples necessary for 10% 15% and 20% levels  of precision were estimated to be 170,82 and 48, respectively. The distribution pattern of egg counts per 75 cm2 of the pasture, fitted the  negative binomial series. A study of sampling variation within 1 ha pastures, showed that differences between bloks, or plots within blocks were significant only in about 20% instances.Nevertheless, choosing of distributed sampling sites whthin the sampling area was suggested.  aBrazil  aCercopidae  aeggs  aentomology  asampling  aAmostragem  aBrachiaria Decumbens  aCigarrinha das Pastagens  aDeois Flavopicta  aEntomologia  aOvo  aPastagem  aZulia Entreriana  aDourados  aMato Grosso do Sul  aPasture  aSpittlebugs1 aPASCHOAL, G. O.1 aSILVA, A. A. da1 aBUAINAIN, C. M.1 aSOUZA, A R. R.  tPesquisa Agropecuária Brasileira, Brasília, DFgv. 20, n. 11, p. 1245-1250, nov. 1985.