PHYSIOLOGY/ BIOCHEMISTRY TRIALS
Physiology and Biochemistry Trials
- PHY 1 PGR for optimum morpho- frame and enhanced yield
- PHY2 Preparing for climate change – Growth and development of arboreum cotton in response to growth regulators
- PHY 3 Effect of growth retardant on physiological parameters and productivity of compact genotypes
- PHY 4 Use of Defoliants to facilitate mechanical picking
- BIO CHEM1 Screening of cotton genotypes for abiotic stress tolerance, estimation of seed oil, gossypol and protein and analysis of biochemical constituents of organic trial
- BIO CHEM2 Analysis of biochemical constituents of organic cotton experiment (Agronomy IV), morpho frame (Phy:1), climate change (Phy :2) growth retardants ( Phy:3) and defoliants (Phy:4)
Significant Achievements: 2022-23
- Ten days after defoliant application made at 65 % of boll opening found that KCL@10%+Dimethopin@1200ppm registered higher per cent of defoliation at Dharwad (93.0%) , sodium chlorate (0.9 %) gave higher defoliation at Junagadh (89.9%) and Thidiazuron @500 ppm gave higher defoliation at Surat (96.2%)
- Morpho frame studies found that application of ethrel @45 ppm at 40DAS followed by mepiquatchloride@100ppm at 90 DAS registered higher seed cotton yield at Sirsa (3132 kg/ha) , LAM (3028 kg/ha) and Dharwad (2185 kg/ha) .In Surat application of ethrel @45 ppm alone at 40DAS (2302 kg/ha) observed higher performance. Application of mepiquatchloride@100ppm at 90 DAS registered higher seed cotton yield at Hisar (2206 kg/ha). These yields were 50.0,20.2,19.2,14.9 and 30.3 per cent respectively higher than control with Hisar, Sirsa, Surat, Dharwad , and LAM respectively
- Ethrel@8.5µM with Detopping on 20 th internode at Dharwad observed higher number of flowers and seed cotton yield in late sown arboreum
- The genotypes viz., H 1530, H 1539, H 1480 and H 1564 at Hisar, GJHV-566, G.Cot-16, and GJHV522, at Surat, and CPD-1902, DDHC 1901, NDLA 3104, and DB1901were found to be drought tolerant.
- The genotypes H 1530 and H 1529 were identified as salt tolerant at Hisar
- Oil and protein content in seeds was maximum in CPD1901, CCHC-19-1, CCHC-19-2 and DDHC-1902 at Dharwad.
- Higher phenolic content in leaves was recorded by Mepiquat chloride spray @100 ppm at 90 DAS. Highest gossypol content in seeds was recorded Ethrel spray @ 45 ppm at 40 DAS at Hisar. Protein, tannin, reducing sugar and phenol content in leaves at 90 DAS were higher due to the application of Ethrel @ 45 ppm at 40 DAS + Mepiquat chloride @100 ppm at 90 DAS at Surat
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