Differential response of mango varieties to boron
1999
Igue, T. | Quaggio, J.A. | Bortoletto, N. | Furlani, P.R. | Rossetto, C.J.(Instituto Agron, Campinas (Brazil))
Behavior of four mango varieties (Haden 2H, Tommy Atkins, Winter and Van Dyke) grafted on three different rootstocks (Carabao, Manga D'agua and Cocoquinho) in relation to Boron, was investigated at Votuporanga, State of South Paulo. Borax, at the rate of 300g per plant, was applied in 1995 and 100g the following years, to three experimental blocks, leaving three blocks without Boron, as checks. The rootstocks showed no difference in response to Boron. The crown varieties showed striking differences in response to Boron. Winter was the least sensitive, Tommy Atkins was intermediate and Haden 2H and Van Dyke were very sensitive to Boron. The Borax application did not alter the yield of Winter, doubled the yield of Tommy Atkins and increased approximately ten times the yield of Haden 2H and Van Dyke. The low yield of Van Dyke and Haden 2H, without Boron application, was due to excessive drop of young fruits. It was concluded that the Boron requirement varies among mango varieties used as crown.
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