• Corpus ID: 55027250

LONGEVITY, FECUNDITY AND EMBRYOGENESIS IN BRAZILIAN APHIDS'

@inproceedings{Celis1997LONGEVITYFA,
  title={LONGEVITY, FECUNDITY AND EMBRYOGENESIS IN BRAZILIAN APHIDS'},
  author={Ver{\'o}nica E. Rub{\'i}n de Celis and Dirceu Neri Gassen and Vera L{\'u}cia da Silva Valente and Alice Kalisz de Oliveira},
  year={1997}
}

• V. E. R. D. Celis, D. N. Gassen, +1 author Alice Kalisz de Oliveira
• Published 1997
• Biology

Aphids cause great damage to cultivated crops. With lhe aim of aid managing methods, biological properties subject to heavy selection were studied in the three south Brazilian species Schizap/Us graminum, Sitobion avenae and Rhopalosipltum padi (Homoptera: Aphididae). Changes in embryonic outer morphology were analysed under contrast phase microscope and eight stages were described. The embryonic period terminated after 20, 24 and 26 hours; lhe Iongevity (expressed in number of days from nymph to adult death) was of 31.13±2.79, 29.73 ± 1.5, 25.13 ±3.22 and lhe fecundily (number of nymphs per adult aphid) was of 66.87 ±8.05, 31.67±3.75,49.53 ±6.26, respec- tively. When lhe fecundily/longevity ratio was compared it was concluded that S. graminuni was lhe mosl dangerous lo wheal, and BR-35 wheal strain was lhe most susceptible to aphid control. The differences in embryonic time and morphological characteristics cnn be used lo classify lhe three species.