01429naa a2200277 a 450000100080000000500110000800800410001910000220006024501050008226000090018752007050019665000180090165000260091965000100094565000170095565000100097265000140098265300130099665300090100965300150101865300120103370000170104570000190106270000250108177300450110611329732022-02-07       1978    bl uuuu     u00u1 u    #d1 aRAMALHO, F. de S.  aResistance of sorghum varieties to Sorghum Midge, Contarinia sorghicola on different planting dates.  c1978  aThe sorghum midge, Contarinia sorghicola, has become a major pest of sorghum in northeast Brazil. The following data were collected at the Serra Talhada Research Station, Pernambuco, Brazil. The resistance of several sorghum varieties planted on different dates was studied in 1977. The plantings were made January 22, 1977; February 12, 1977; March 5, 1977; March 26, 1977 and April 15, 1977. The different responses of the varieties in relation to the sorghum midge damage were evident. The mean damage ratings for the varieties are given in Table 1. There was significant influence of planting date on sorghum midge infestation. The interaction between varieties and planting date was significant.  aGrain sorghum  aContarinia Sorghicola  aPraga  aResistência  aSorgo  aVariedade  aNordeste  aPest  aResistance  aVariety1 aFARIS, M. A.1 aLIRA, M. de A.1 aZIMMERMANN, F. J. P.  tSorghum Newslettergv. 21, p. 4-5, 1978.