Effect of spraying with biozym* tf growth regulator on the growth and yield of three cucurbita moschata genotypes

الملخص EN

The experiment was carried out in the scientific fields of the department of horticulture and landscaping- college of agriculture- university of Diyala.

the study included two factors, the first factor three concentrations of the growth regulator biozyme * Tf 1,0.5,0 mg.l -1 the second factor three genotypes of pumpkin, the local cultivar and hybrid Pumpa 'Charmant' f1 and the hybrid Myskpumpa (butternut) 'herculs' f1,.

the experiment was applied according to randomized complete block design (R.C.B.D) with split plot.

the results were as follows:- the process of spraying with Biozyme * Tf growth regulator at a concentration of 1 mg.l-1 led to a significant effect on the number of leaves, the number of branches, the length of the plant, the leaves content of chlorophyll, the number of fruits and the total yield, and it gave 57.97 leaf.plant-1, 6.37 branch.

plant -1, 109.44 cm, 54.80 Spad, 2.13 fruit.plant -1, 43.31 tons.

ha-1, respectively compared with the comparison treatment (spraying with water only) which gave the lowest rate in number of leaves, number of branches, plant length, leaf content of chlorophyll, number of fruits and total yield, which gave 47.31 leaf.plant-1, 4.35 branch.plant-1, 94.15 cm,,49.72 Spad, 1.02 fruit.

plant-1, 14.72 ton.

ha-1, respectively.

cultivars varied in most of the characteristics of vegetative and flowering growth, as well as qualitative and quantitative yield, where the local cultivar outperformed by giving the highest rate in number of leaves, number of branches, plant length, leaf content of chlorophyll and total yield, which gave 63.55 leaf plant-1, 6.97 branch plant -1, 131.41 cm, 56.40 Spad, 34.47 ton.

ha-1, respectively, compared with the cultivar Myskpumpa, which gave the lowest average in number of leaves, number of branches, leaf content of chlorophyll and total yield, which gave 45.66 leaf.

plant-1,3.42 branch.plant-1,,48.48 Spad, 12.74 ton.ha-1, respectively.

the interaction treatment between the local cultivar and spraying at a concentration of 1 mg.l-1 gave a significant superiority in the number of leaves, number of branches, plant height, leaves content of chlorophyll and total yield.