Differential response of mango varieties to boron.
Rossetto C. J., Furlani P. R., Bortoletto N., Quaggio J. A., Igue T.
Author Affiliation: Instituto Agronomico, C P 28, Campinas, SP, 13 001-970, Brazil.
: 259-264
Abstract : The behaviour of mango cultivars Haden 2H, Tommy Atkins, Winter and Van Dyke grafted on Carabao, Coquinho and Manga D'agua rootstocks in relation to boron, was investigated under open field cultivation, at Votuporanga, State of São Paulo, Brazil. Borax, at a rate of 300 g per plant was applied to the soil in 1995 and 100 g in the following years. The rootstocks showed small differences in response to B but the scion cultivars showed striking differences. Winter was the least sensitive, Tommy Atkins was intermediate and Haden 2H and Van Dyke were very sensitive to B. Borax application did not alter the yield of Winter, doubled the yield of Tommy Atkins and increased the yield of Haden 2H and Van Dyke by >5 times. The low yield of Van Dyke and Haden 2H without B application was due to excessive drop of young fruits. The average B content in the medium leaves ranged from 7.6 to 10.0 mg/kg without B application and from 23.9 to 29.9 mg/kg with B.