Influence of foliar application of plant growth regulators on pre-harvest drop, yield and quality in Kinnow mandarin
| dc.contributor.advisor | Kumari, Karuna | |
| dc.contributor.author | Bharti, Aditi | |
| dc.date.accessioned | 2017-07-12T05:24:35Z | |
| dc.date.available | 2017-07-12T05:24:35Z | |
| dc.date.issued | 2017-07 | |
| dc.description.abstract | Citrus is the world’s leading tree fruit crop and one of the most important fruit crop of sub tropical region. Kinnow is one of the important fruit crop among citrus species. Citrus occupies about 14.9 per cent of the total land under various fruit crops in India, but national productivity of mandarin is low (9.3 t/ha) as compared to banana, papaya , grapes, guava etc. Pre harvest fruit drop is one of the major cause of low productivity in Kinnow mandarin, because of its economic importance to the growers as this drop occurs just before harvest. Pre harvest drop occurs mostly due to formation of abscission layer and this can be reduced by exogenous application of growth regulators. Hence there is huge scope to improve the productivity by standardizing the dose of plant growth regulators which controls the fruit drop. Keeping in view these factors, the present experiment entitled “Influence of foliar application of plant growth regulators on pre harvest fruit drop yield and quality in Kinnow mandarin” was conducted at B.A.C., Sabour during 2016-17. The experiment consists of nineteen treatments including control. Various concentration of three different growth regulators 2,4-D (10 and 20 ppm), GA3 (25 and 50 ppm) and NAA (10 and 20 ppm) were applied on 15th of October and 15th of November separately and in both the months to check impact of various treatments on pre harvest fruit drop, yield and fruit Quality. The results revealed that the foliar application of 2,4-D 20 ppm in both months (15th October + 15th November) was most effective in controlling fruit drop as minimum drop (12.87%) was recorded in this treatment. It was followed by application of NAA 20 ppm in both the months (15th October +15th November) which was at par by application of 2,4-D 10 ppm (15th October + 15th November) with fruit drop recorded (16.0%) and (16.68%) respectively. The maximum fruit drop (30.87 %) was recorded in control when no growth regulators were sprayed on the trees. The physical parameter viz. number of fruits per plant, fruit weight, width, length, juice percent and juice to rag ratio were also recorded maximum when tress were sprayed with 2, 4 –D 20 ppm in both months (15th October + 15th November). However biochemical parameters viz. TSS, TA, TSS:TA, total sugar, ascorbic acid and other antioxidant compounds were observed maximum when trees were sprayed with 20 ppm NAA in both months (15th October + 15th November). Our results also indicates that Auxins (2,4-D and NAA) performed better compared to GA3 in reducing the fruit drop and to improve the yield and quality of Kinnow mandarin. | en_US |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/5810025043 | |
| dc.language.iso | en | en_US |
| dc.pages | 83 | en_US |
| dc.publisher | Department of Horticulture (Fruit & Fruit Technology), BAU, Sabour | en_US |
| dc.sub | Horticulture | en_US |
| dc.subject | null | en_US |
| dc.theme | Fruit & Fruit Technology | en_US |
| dc.these.type | M.Sc | en_US |
| dc.title | Influence of foliar application of plant growth regulators on pre-harvest drop, yield and quality in Kinnow mandarin | en_US |
| dc.type | Thesis | en_US |