01923naa a2200205 a 450000100080000000500110000800800410001910000150006024501490007526000090022452012990023365000130153265300130154565300110155870000170156970000180158670000200160470000180162477300750164210534511996-05-21       1994    bl ---       0--  u    #d1 aPINESE, B.  aControl of aphid-borne papaya ringspot potyvirus in zucchini marrow (Cucurbita pepo) with reffective mulches and mineral oil-insecticide sprays.  c1994  aPlastic mulches and mineral oil plus insecticide sprays were evaluatedfor control of papaya ringspot potyvirus (PRV-W) in zucchini (Cucurbita pepo cv. "Blackjack") in two field experiments in Queensland, Australia. Treatments were compared using a proportional hazards survival model. Mulches with a reffective (silver) surface reduced the hazard ratio (Hr) from 1 in the controls to 0-32, while mineral oil plus insecticide sprays (Hr 0-33) were as effective as reflective mulches used alone (P&gt0-05). A combination of reflective mulch and oil plus insecticide sprays was the most effective treatment (Hr 0-16). Black mulch alone(Hr 0-66) was partly effective and significantly better than control (P&lt0-05). Blue and grey mulches were not effective (Hr 0-86 and 0-99, respectively). Spraying with deltamethrin alone (Hr 0-75) improved control compared to the no-spray treatment (P&lt0-05) but was not as effective as sprays of Albarol mineral oil plus demeton-S-methyl (Hr 0-26) (P&gt0-05). Albarol (Hr 0-26) provided significantly better control (P&lt0-05) than Lovis (Hr 0-46) when each was combined with demeton-S-methyl. Improved protection against PRV-W was directly related to low aphid numbers on plants and to low alate numbers colleced in water traps placed within the treatments.  aAbóbora  aControle  aVirose1 aLISLE, A. T.1 aRAMSEY, M. D.1 aHALFPAPP, K. H.1 aFAVERI, S. de  tInternacional Journal of Pest Managementgv. 40, n. 1, p. 81-87, 1994.