Youssef,, N., Awad, E., Galar, A. (2006). EFFECT OF CALCIUM SOURCES ON YIELD, QULlTY AND DEVELOPMENT OF DRY AND SOFT ROT DISEASES ON SOME POTATO VARIETIES. Journal of Plant Production, 31(6), 3801-3814. doi: 10.21608/jpp.2006.236054
N. S. Youssef,; EI. M. M. Awad; A. A. Galar. "EFFECT OF CALCIUM SOURCES ON YIELD, QULlTY AND DEVELOPMENT OF DRY AND SOFT ROT DISEASES ON SOME POTATO VARIETIES". Journal of Plant Production, 31, 6, 2006, 3801-3814. doi: 10.21608/jpp.2006.236054
Youssef,, N., Awad, E., Galar, A. (2006). 'EFFECT OF CALCIUM SOURCES ON YIELD, QULlTY AND DEVELOPMENT OF DRY AND SOFT ROT DISEASES ON SOME POTATO VARIETIES', Journal of Plant Production, 31(6), pp. 3801-3814. doi: 10.21608/jpp.2006.236054
Youssef,, N., Awad, E., Galar, A. EFFECT OF CALCIUM SOURCES ON YIELD, QULlTY AND DEVELOPMENT OF DRY AND SOFT ROT DISEASES ON SOME POTATO VARIETIES. Journal of Plant Production, 2006; 31(6): 3801-3814. doi: 10.21608/jpp.2006.236054
EFFECT OF CALCIUM SOURCES ON YIELD, QULlTY AND DEVELOPMENT OF DRY AND SOFT ROT DISEASES ON SOME POTATO VARIETIES
Horticultural and pathological experiments were carried out during the summer seasons of 2004 and 2005 at the Experimental Farm of Mallawy Agriculture Research Station, EI-Minia, Egypt and the Plant Pathology Dept., Fac. of Agric., EI-Minia University, EI-Minia, Egypt.
Eleven calcium salts (Dicalcium pyrophosphate, Calcium carbonate, Calcium chloride, Calcium gluconate, Calcium phosphate, Calcium sulphate, Calcium acetate, Calcium tartarate, Calcium hydrogen orthophosphate, Calcium oxide, and Calcium lactate) besides control (tap water) [12 treatments], were applied individually at concentration 2000 ppm by spraying the growing plants at the time of tuberization after 45, 60 and 75days from planting on potato (Solanum tuberosum L.), cv. "Nicola". Calcium chloride and Ca hydrogen orthophosphate gave significant increase in the total tubers yield (ton/fed.) as well as No. of tubers/plant in both seasons with insignificant differences between them. Yield percentage increase reached to 16.55 and 13.44 with Ca chloride, 17.81 and 12.33 Yolth Ca hydrogen orthophosphate in both seasons, respectively. Also, No. tubers /plant were affected by the above treatments. In the two seasons, Ca hydrogen orthophosphate recorded a significant increase in number of tubers (10.63 and 8.95 tubers/plant) compared to 11.44 tubers/plant with Ca oxide only, in the first season and 9.14 tubers/plant with Ca chloride only, in the second season. Significant increase in the dry matter % was found with Ca tartarate (21.57%) followed by Ca oxide (19.97%) in the first season, but the difference between them were detected in the second season, was insignificant compared with other Ca sources and the control treatments.
Likewise, CaCI2 and Ca hydrogen orthophosphate increased the percentage; i. e., of potato seed tubers 41.60 % and 39.67 % in the first season and 38.00 % and 38.28 % in the second. Differences did not reach to the level of significant.
Foliar treatments with CaCl2/or Ca oxide gave the highest Ca (%) (averaged 1.40 %) in potato tubers and can be used to off set the shortage of Ca % in potato tubers. Also the total phenolics content (TPC) differed among the potato tubers treated with Ca sources and those treated with Ca oxide (164.0 )Jg/ml). Also it has been found that their was a relationship between TPC and Ca (%),also, the anion companion may play role.
Among six potato cultivars, (Alpha, Diamant, Hermez, Lady Rosseta, Nicola and sant') cv. Nicola was the highest susceptible one to soft rot disease followed by cv. Diamant with insignificant difference between them. Ca-oxide was more effective to protect potato tubers against dry rot disease (72.09 %).
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