Axillary panicle induction by chemicals in mango tree (Mangifera indica L.).
Hwang S. F., Chen D. L., Hu W. S., Shü Z. H.
Author Affiliation: Department of Plant Industry, National Pingtung University of Science and Technology, Pingtung 912, Taiwan.
: 177-182
Abstract : Fifteen 22-year-old Irwin and fifteen 15-year-old Keitt mango trees in Yu-Jin county, Tainan, Taiwan, were selected and sprayed with different concentrations of pruning chemicals (hydrogen cyanamide (H2CN2 at 0.75 and 1.00%) or calcium cyanamide (CaCN2 at 3 and 4%) until runoff) in 1998. Both H2CN2 concentrations had better induction rates than CaCN2 in Irwin. In Keitt, H2CN2 at 0.75% recorded the highest axillary panicle induction rate (64%), while H2CN2 at 1.00% and both CaCN2 concentrations gave less induction rate. There was no difference in the number of axillary panicles induced by either chemical at either of the concentrations in Irwin. In Keitt, CaCN2 induced more panicles than H2CN2. CaCN2 produced shorter axillary panicles than H2CN2 in Irwin. No difference in axillary panicle length was found among all treatments in Keitt. The time needed for the emergence of axillary panicle in Irwin was approximately 2 months for both chemical treatments, while that in Keitt was 30 days (for H2CN2) to 47 days (for CaCN2).