Control of purple spot of loquat fruit (Eriobotrya japonica) by means of mineral compounds |
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Authors: | N GARIGLIO,A MARTINEZ-FUENTES,C MESEJO,M AGUSTÍ |
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Affiliation: | Facultad de Ciencias Agrarias, Universidad Nacional del Litoral, Kreder 2805 (3080), Esperanza, Santa Fe, Argentina;Instituto Agroforestal Mediterráneo, Universidad Politécnica, Camino de Vera, s/n, 46022 Valencia, Spain |
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Abstract: | Treatments to control purple spot of loquat fruit (Eriobotrya japonica) were tested based on the hypothesis that the disorder appears as a consequence of water unbalance between flesh and epidermal tissues caused by their different ability for sugar accumulation. Calcium nitrate, calcium chloride, Ca‐EDTA, ammonium nitrate and potassium nitrate at a concentration of 150 mm applied 2 weeks before fruit colour break reduced significantly the proportion of purple‐spotted fruit, giving rise to a reduction of water potential of the epidermal tissue that allows it to retain water. The most favourable date of treatment was during the 2 weeks prior to fruit colour break. |
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Keywords: | Calcium fruit growth sucrose sugars physiological disorder water potential |
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