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Author: Abhilasha × Type: Thesis ×
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    Influence of growth regulator, crop geometry and fruit retention on seed yield and quality in bottle gourd (Lagenaria siceraria (mol.) Standle.)”
    (Punjab Agricultural University, Ludhiana, 2021) Abhilasha; Rajinder Singh
    The present investigation entitled “Influence of growth regulator, crop geometry and fruit retention on seed yield and quality in bottle gourd (Lagenaria siceraria (Mol.) Standle.)” was conducted at Experimental Research Farm and Seed Physiology Laboratory, Office of Director (Seeds), PAU, Ludhiana during February to July 2019 and 2020. The experiment was laid in factorial randomized block design keeping three row spacings (250 x 50, 225 x 50 and 200 x 50 cm), three ethrel treatment at 2-4 leaf stage ( 50 ppm, 100 ppm and control) and number of fruits to be retained per plant (one, two and three fruits). Growth, yield, physiological and biochemical parameters were studied. The statistical analysis of data showed that at 250 x 50 cm spacing maximum vine length before fruit harvest, number of filled seeds,100 seed weight, number of seeds per fruit, germination percentage, speed of germination, seedling vigour index –I and II, seed yield per plant and per hectare, amino acids and alpha amylase activity and total lipid percentage was observed, but amount of total soluble sugars and number of unfilled seeds were minimum and were comparable at 225 x 50 cm spacings. With ethrel application at 50 ppm concentration maximum number of filled seeds, hundred seed weight, seed number per fruit, seed yield per plant, seed yield per hectare, germination percentage, speed of germination and seedling length, seedling dry weight, seedling vigour index I & II, total amino acids, alpha amylase activity and total lipid percentage were observed. Retaining one fruit per vine length improved hundred seed weight, number of seeds per fruit, germination percentage, speed of germination, seedling length, seedling vigour index I & II, total amino acids, alpha amylase activity but seed yield per plant, seed yield per hectare were maximum with retention of two fruits per vine. Based on this study, it is concluded that maximum seed yield and quality of bottle gourd seed was obtained when they were spaced at 225 x 50 cm and sprayed with ethrel @ 50 ppm at 2 and 4 leaf stage and two fruits per vine were retained.