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Fruit resistance of sixteen apple tree cultivars malus domestica bork to corn weevil sitophilus zeamais motschulsky 1855 coleoptera curculionidae



Fruit resistance of sixteen apple tree cultivars malus domestica bork to corn weevil sitophilus zeamais motschulsky 1855 coleoptera curculionidae



Agronomia Sulriograndense 23(1): 3-10



A field experiment was conducted in Veranopolis, RS, during 1985/86 growing season, with the apple tree cultivars Belgolden, Blackjon, BR-1, FR-10, FR-18, Fuji, Gala, Golden Delicious, Golden Spur, Granny Smith, Jose Bin, Melrose, Mollies Delicious, Royal Red Delicious, Starkrimson and Willie Sharp. The objective of this work was to study fruit resistance of sixteen apple tree commercial cultivars to corn weevil (Sitophilus zeamais). The evaluations were performed at the final stage of maturation and at harvest. A total of 100 fruits per cultivar were observed, 25 from each replication. The results showed that the most resistant cultivars were Jose Bin, FR-18, Gala, BR-1, Starkrimson and Royal Red Delicious. The cultivars Willie Sharp, Belgolden, Golden Delicious and Golden Spur showed intermediate resistance. The cultivars more susceptible to the attack of corn weevil were Fuji, Granny Smith, Blackjon, FR-10, Melrose and Mollies Delicious.

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