Ongoing Projects

ICAR partly / fully financed schemes (from 01.04.2016 to till date)

AICRP Number	Discipline	Name of the project	Name and designation of the Scientist In-charge	Progress of work
1.4.7. Gr.	Horticulture	Evaluation of coloured table varieties	Dr. A. Subbiah Asst. Professor (Hort.)	With regard to vine growth characters evaluated among the six coloured table grapes varieties, the grapes var. Fantasy Seedless recorded the highest values for vine growth characters viz., leaf length (12.24 cm), leaf width (13.65 cm), leaf area (131.95 cm 2 ), petiole length (7.92 cm) and internodal length (5.95 cm) respectively. The highest cane thickness (3.23 cm) was observed in grapes var. Crimson Seedless. The lowest values for vine growth characters viz., leaf length (10.72 cm), leaf width (11.98 cm) and leaf area (101.29 cm2) were registered in grape var. Red Globe. Among the six coloured table grape varieties evaluated, the highest values in terms of number of bunches (31.45 vine^-1) and fruit yield (7.17 kg vine^-1) were recorded in clone A-18/3 followed by Red Globe with the fruit yield of 5.28 kg per vine. The highest bunch weight of 435.93 g was also registered in Red Globe. In terms of fruit quality characters the grapes var. Fantasy Seedless registered the highest TSS of 20.64⁰Brix and lowest acidity of 0.52 per cent.
1.4.8. Gr.	Horticulture	Evaluation of raisin varieties	Dr. A. Subbiah Asst. Professor (Hort.)	Among the four raisin varieties evaluated, the grapes var. Thompson Seedless (V4) recorded the highest values for leaf length (11.86 cm), leaf width (14.66 cm), leaf area (169.32 cm2), number of matured canes (48.53), petiole length (7.82 cm) and intermodal length (5.40 cm) and the highest shoot length (52.55 cm) and cane thickness (3.27 cm) was observed in Kishmish Rozavis White (V3). Among the raisin varieties evaluated for yield characters, the highest number of bunches per vine (19.51), bunch weight (295.32 g) and fruit yield (16.11 kg vine-1) was registered in grapes var. Thompson Seedless (V4). In respect of quality characters, the grapes var. Merbein Seedless (V1) registered the highest TSS (22.73⁰Brix) with the lowest acidity (0.50%) and raisin recovery (23.72%). The highest acidity was recorded in the grapes var. 2A Clone.
1.4.9. Gr.	Horticulture	Evaluation of juice varieties	Dr. A. Subbiah Asst. Professor (Hort.)	Fruit pruning was carried out on 08.11.2018. Observations on vine growth, yield and quality parameters were recorded. Among the juice varieties evaluated, the highest values for leaf length (12.19 cm), cane thickness (1.91 cm) and internodal length (5.99 cm) were recorded in the variety V₅ (Bangalore Blue). The grape variety Punjab MACS Purple (V₃) recorded the highest values for growth characters viz., leaf width (13.47cm) and leaf area (154.05 cm²). In respect of yield characters, the highest number of bunches (48.30 vine^-1) was recorded in Punjab MACS Purple (V₃). Whereas the individual bunch weight (398.19 g) and fruit yield (12.40 kg vine^-1) were registered in grapes hybrid Manjari Medika (V₁). The number of bunches per vine (19.62), bunch weight (123.32 g) and juice recovery (52.15%) were low in V₅(Bangalore Blue). In respect of quality characters, the highest TSS (20.06⁰Brix), juice recovery (59.68%) and the lowest acidity (0.55%) were recorded in Punjab MACS Purple (V₃).
2.4.1.Gr.	Horticulture	Evaluation of commercial grapes varieties on different rootstocks	Dr. A. Subbiah Asst. Professor (Hort.)	Planting of 1103 P, 110R, SO4 and Dogridge rootstocks have been done under the ‘’Y’’ trellis training system. In situ grafting was carried out during November, 2018. The grapes varieties viz., Thompson Seedless and Muscat Hamburg were evaluated for vine growth characters. The results revealed that the grapes var. Muscat Hamburg grafted on rootstock 1103 Paulson (V₂R₁) recorded the highest leaf length (12.68 cm), leaf width (13.85 cm) and leaf area (175.79 cm2). The highest petiole length (6.30 cm) was registered in grapes var. Thompson Seedless grafted on rootstock SO4 (V₂ R₃). The maximum intermodal length (5.98 cm) was recorded in grapes var. Muscat Hamburg grafted on rootstock 110R (V₂ R₂). The trunk girth was found to be the highest (3.78 cm) in grapes var. Thompson Seedless grafted on rootstock 1103 Paulson (V₂ R₁).
4.4.1. Gr.	Horticulture	Assessment of post harvest losses in grapes	Dr. A. Subbiah Asst. Professor (Hort.)	The data on field level postharvest losses were recorded during the harvesting season from September – 2018 to January, 2019. Further the postharvest losses occur during transportation and at market level were assessed at local retailing points in and around Cumbum and Theni. The results indicated that the postharvest loss was higher in Thompson Seedless (33.50 %) as compared to Sharad Seedless (27.50 %).
6.4.2. Gr.	Plant Pathology	Validation of online interactive weather information based disease and insect pest risk assessment	Dr. A. Manonmani Asst. Professor (Plant Pathology) Dr. A. Subbiah Asst. Professor (Hort.)	The disease incidence of downy mildew was recorded from 0.36 to 2.95 per cent in the advisory plot after the foundation pruning, whereas it was ranged from 1.23 to 11.40 per cent in the farmers’ practice plot. The powdery mildew disease incidence 4.78 to 10.21 per cent was registered from in advisory plot, while in the farmers’ practice plot it was ranged from 8.75 to 23.64 per cent. During the fruit pruning season, the downy mildew disease incidence was low and varied from 0.56 to 2.03 per cent in the plot adopting online advisory system, while it was ranged between 1.55 and 8.92 per cent in control plot. In respect of powdery mildew disease incidence it was registered in the range of 2.32 to 14.96 per cent in vineyard – II adopting online advisory system compared to farmers’ practices plot, wherein it was in the range of 2.87 to 25.64 per cent.

Private Agency Scheme

Name of the Sponsor	Title of Scheme	Name of the Scientists In-charge	Period	Progress of work
M/s., Corteva Agri Sciences (Formerly DowAgro Sciences), Mumbai	Testing the bio-efficacy and phytotoxicity of sulfaxaflor 24 W/W against sucking pests in grapes	Dr. J. Jayaraj Professor (Agrl. Entomology) & Dr. A. Subbiah Asst. Professor (Hort.)	01.07.2019 to 30.06.2021	The treatments were imposed as per the approved programme in the farmer’s field located at KK Patty village of Theni district. The trial is in progress.

Name of the Sponsor

Title of Scheme

Name of the Scientists

In-charge

Period

Progress of work

M/s., Corteva Agri Sciences (Formerly DowAgro Sciences), Mumbai

Testing the bio-efficacy and phytotoxicity of sulfaxaflor 24 W/W against sucking pests in grapes

Dr. J. Jayaraj

Professor (Agrl. Entomology)

Dr. A. Subbiah

Asst. Professor (Hort.)

01.07.2019 to 30.06.2021

The treatments were imposed as per the approved programme in the farmer’s field located at KK Patty village of Theni district. The trial is in progress.