01369naa a2200229 a 450000100080000000500110000800800410001910000180006024501070007826000090018552007500019465000250094465000110096965300120098065300130099265300140100565300120101965300270103165300150105870000190107377300470109216485412023-05-23       1989    bl uuuu     u00u1 u    #d1 aGONSALVES, D.  aCross-protection techniques for control of plant virus diseases in the tropics.h[electronic resource]  c1989  aControl of many plant virus diseases in the tropics is difficult for several reasons. Virus-resistent or virus-tolerant cultivars are not available for many tropical crops. diseases cycles are not broken by killing winter temperatures, virus and insect vector reservoirs are present throughout the year, and, typically, crops are grown in numerous small plots over a wide area with little isolation. We believe that cross rpotection is a strategy that can be used to good advantage to selectively control virus diseases of tropical crops. It is not our purpose to justify the use of cross protection. Basic criteria for selection of cross protection as a disease control strategy are well known, and we assume these have already been considered.  aEngenharia Genética  aManejo  aControl  aControle  aDiiseases  aDoencas  aGenetically engeneered  aManagement1 aGARNSEY, S. M.  tPlant Diseasegv.73, n.7, p.592-597, 1989.