ABSTRACT
Efficiency of new fungicides in the control of apple scab

Adriana Pinto de T.1 e Iris Carreño I.1
 

Two trials on scab control on Richared Delicious apple trees in the VII Region of Chile, are reported. Fungicides were: CGA 71818 PM (Topas) CGA 64251 PM (Vangard), Baycor 500 SC plus Bayleton PM, and Bravo 500 F; their effectiveness is given in four tables. Topas and Vangard controlled scab when applied under both “calendar” or “climatic conditions” systems, while the check trees presented 1000/o infectionon leaves and fruits. Daily levels of primary inocolum of Venturia inaequalis (Cke.) Wint. were measured, wiih a Burkard trap, from September to November. Their occurrence and rete of release/hour are given in two figures.

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1 Estación Experimental La Platina (INIA), Casilla 439, Correo 3, Santiago, Chile.