02166naa a2200277 a 450000100080000000500110000800800410001910000200006024501040008026000090018450001310019352012410032465000140156565000170157965000210159665000220161765300160163965300180165565300210167365300270169470000160172170000170173770000220175470000220177677300900179820979042019-02-25       2018    bl uuuu     u00u1 u    #d1 aSILVA, L. C. da  aDemographic parameters of cowpea aphids on advanced semi-erect cowpea lines.h[electronic resource]  c2018  aTítulo em português: Parâmetros demográficos do pulgão-preto em linhagens avançadas de feijão-caupi de porte semiereto.  aThe objective of this work was to evaluate the resistance of advanced semi-erect cowpea (Vigna unguiculata) lines, by means of a screening assay for resistance and the elaboration of fertility-life tables of Aphis craccivora (Hemiptera: Aphididae). The experiments were carried out in a screenhouse. For the resistance trial, 15 advanced cowpea lines were used, as well as two standard genotypes for resistance and two for susceptibility, which were arranged in six blocks. After resistance was determined, two lines with the highest and lowest resistance were selected for the development of the fertility-life tables which were used to estimate demographic parameters. The MNCO4-762F-03 and MNCO4-762F-09 cowpea lines were classified as resistant, for which cowpea aphids showed the lowest values (in parentheses, respectively) for: net reproductive rate (RO = 3.0 and 2.5), intrinsic rate of increase (rm = 0.16 and 0.15), and finite rate of increase (λ = 1.18 and 1.16). The highest values were obtained for the 'Vita-7', MNCO4-795F-168, and 'BRS Tumucumaque' genotypes. The MNCO4-762F-03 and MNCO4-762F-09 lines show antibiosis-type resistance, which directly affects the reproductive potential of the cowpea aphid population.  aFecundity  aPlant health  aAphis Craccivora  aVigna Unguiculata  aFecundidade  aFitossanidade  aPlant resistance  aResistência de planta1 aNERE, D. R.1 aBLEICHER, E.1 aBARBOSA, A. V. C.1 aTAVARES, E. J. M.  tPesquisa Agropecuária Brasileira, Brasília, DFgv. 53, n. 8, p. 900-908, Aug. 2018.