ISHS Acta Horticulturae 695: I International Symposium on Tomato Diseases
MANAGEMENT ON BLOSSOM END ROT DISORDER OF TOMATOES IN THAILAND |
| Authors: | S. Techawongstien, S. Techowongstien, K. Lertrat, H. Bolkan |
| Keywords: | filter cake, chicken manure, calcium silicate, calcium chloride, ammonium nitrogen fertilizer, nitrate nitrogen fertilizer |
| Abstract:
Efficacy of calcium silicate, chemical fertilizers, calcium chloride, soil amendment with filter cake, chicken manure, and in combination with each other on the development of blossom-end rot disorder in tomatoes was investigated. Tomato seeds were sown in peat substrate media with or without calcium silicate. Seedlings were transplanted at 25 days old to different growing media with different soil mixtures and basal fertilizer application. Spraying calcium chloride at anthesis stage had no effect on yield or blossom-end rot development compared to untreated control. Application of chemical fertilizer of 13-13-21 in nitrate form did not promote better yields, but significantly reduced blossom-end rot disorder. Similarly, tomato plants grown without calcium silicate in media supplemented with fermented waste of sugar manufacturing or filter cake; plus chicken manure and half of the recommended amount of 13-13-21 in ammonium form for basal fertilizer + half of the recommended amount of 13-13-21 in ammonium form for top-dressing, and in a treatment same as the above plus foliar sprays of calcium chloride gave better plant growth, high fresh yield (>4 kg/plant) and low blossom-end rot disorder (<0.2 fruit/plant). | |
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