Abstract
In tomato, infestation by the natural population of the fruit borer, Heliothis armigera (Hubner), on number basis was positively correlated with infestation on weight basis. Infestation was negatively correlated with the number of flowers per inflorescence. Surface texture of calyx also affected the susceptibility of the genotype. Reducing sugars in fruits were positively correlated, while zinc and iron content in foliage and ascorbic acid contents in fruits were negatively correlated with degree of infestation. Coefficient of determination revealed that 87% variability in borer infestation was due to zinc, iron, ascorbic acid and reducing sugar content.
Résumé
Chez la tomate, l’infestation par (la chemille mineuse des fruits) H. armigera sur une base numérique était corrélée positivement avec l’infestation sur une base pondérale. L’infestation était corrélée négativement avec le nombre de fleurs par inflorescence. La dureté du Calice affectait également la sensibilité du génotype. La teneur en sucres réducteurs était corrélée positivement, alors que les teneurs en zinc et fer dans les feuilles et en acide ascorbique dans les fruits étaient corrélées négativement avec l’infestation. Le coefficient de détermination a révélé que 87% de la variabilité dans l’infestation par cet insecte était due aux teneurs en zinc, en fer, en acide ascorbique et en sucres réducteurs.
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Kashyap, R.K., Verma, A.N. Factors Imparting Resistance to Fruit Damage by Heliothis armigera (Hubner) in Some Tomato Phenotypes. Int J Trop Insect Sci 8, 111–114 (1987). https://doi.org/10.1017/S1742758400007086
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DOI: https://doi.org/10.1017/S1742758400007086