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Subject: Fruit Science × Author: Pooja × Type: Thesis ×
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    ThesisItemOpen Access
    Effect of herbicides on weed control and quality of guava cultivar L-49
    (Chaudhary Charan Singh Haryana Agricultural University hisar, 2022-10) Pooja; Goyal, Ramesh Kumar
    The experiment entitled “Effect of herbicides on weed control and quality of guava cultivar L-49” was carried out at Experimental orchard of Department of Horticulture, CCS Haryana Agricultural University, Hisar during the year 2019-20 and 2020-21 in winter season. The experiment was carried out to find the effect of herbicides and sequential applications of herbicides on soil properties, weed control, growth characters, fruit and yield attributes on guava cultivar L-49. The treatments comprising 21 levels of herbicides in experiment 1 and 15 levels of sequential applications of herbicides in experiment 2. The treatments were laid out in a randomized block design with three replications keeping a net plot size of 6.0 x 6.0 m separately. The data were recorded on various parameters, which were influenced by different levels of herbicides and sequential applications of herbicides. In experiment 1, weed free treatment was found best for soil properties viz. ECe and available N, P, K, Zn and Fe; weed parameters viz. weed density, visual mortality, fresh and dry weight; growth parameters viz. plant height, plant spread, leaf area, chlorophyll content; fruit parameters viz. fruit weight, fruit length, fruit breadth, number of fruits, yield, fruit firmness, fruit colour; and quality parameters viz. TSS, acidity, ascorbic acid, TSS:acidity ratio and pectin content. Among herbicidal treatments, the combination of glyphosate (1.26 kg/ha) + carfentrazone (20 g/ha) and glyphosate (1.26 kg/ha) + oxyflourfen (100 g/ha) were found best. In experiment 2, from all the sequential application of herbicides, the treatment glyphosate 1.26 kg/ha (July) fb glyphosate 1.26 kg/ha (August) fb glyphosate 1.26 kg/ha (September) was found best for soil properties viz. ECe and available N, P, K, Zn and Fe; weed parameters viz. weed density, visual mortality, fresh and dry weight; growth parameters viz. plant height, plant spread, leaf area, chlorophyll content; fruit parameters viz. fruit weight, fruit length, fruit breadth, number of fruits, yield, fruit firmness, fruit colour; and quality parameters viz. TSS, acidity, ascorbic acid, TSS:acid ratio and pectin content.