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Chakraborty A.,BCKV | Singh B.P.,ICAR Central Potato Research Institute | Ahmad I.,ICAR Central Potato Research Institute Campus | Sharma S.,ICAR Central Potato Research Institute
Potato Journal | Year: 2015

Late blight is the single most important impediment in potato cultivation throughout the world. The management of this devastating disease depends on regular application of fungicides at short intervals throughout the growing season resulting in health and environment hazards. However, timely forecasting of the disease may result in lesser application of fungicides wiTheffective management of the disease. Out of fourteen forecasting models tested for predicting late blight in plains of West Bengal, none of the model (except Wallin, Bhattacharyya’s II forecast and Dutch rules) could predict late blight. JHULSACAST model was fine-tuned by making modifications in input parameters (relative humidity, temperature duration and amount of rainfall) by utilising weather data for 7 years collected at Bidhan Chandra Krishi Vishavidhyalaya, Kalyani, West Bengal, India. The modified JHULSACAST model could predict late blight within 14 days with an accuracy of 100% if 7-day moving relative humidity (≥90%) period for ≥105 hours coupled with 7-day moving congenial temperature (7.2 to 26.6°C) for ≥150 hours prevail for 7-consecutive days or if 5-day moving relative humidity (≥90%) period for ≥65 hours, 5-day moving congenial temperature (7.2 to 26.6°C) for ≥105 hours for 5 consecutive days and sum of two consecutive days rainfall (≥2.5 mm) prevail. These models were validated and predicted late blight successfully for two years. © 2015, Indian Potato Association. All rights reserved. Source


Dua V.K.,ICAR Central Potato Research Institute | Singh B.P.,ICAR Central Potato Research Institute | Ahmad I.,ICAR Central Potato Research Institute Campus | Sharma S.,ICAR Central Potato Research Institute
Potato Journal | Year: 2015

Potential impact of climate change in potato seed crop due to late blight appearance and number of chemical sprays required to control it in Punjab and western Uttar Pradesh were analysed in this study using JHULSACAST. The model was run using districts level data on minimum and maximum temperature (°C) of Indian Meteorological Department’s normals (years 1971 to 2000) for baseline (year 2000) and future climate scenarios (years 2020 and 2055) for 13 districts of Punjab and 21 districts of western Uttar Pradesh. Hourly temperature (°C) data required for JHULSACAST was derived from minimum and maximum temperature (°C). Kriging method was used to interpolate data over geographical area of districts. Under the favourable relative humidity in Punjab, the model predicted earliest late blight appearance is during 13 to 25 October in baseline scenario (2000) which is expected to be delayed by 0 to 6 days in 2020 and 12 to 14 days in 2055 scenarios. In western Uttar Pradesh, earliest late blight appearance during the potato crop season was predicted during 13 October to 1 November in baseline year 2000 and is expected to be delayed by 0 to 8 days in 2020 and 10-21 days in 2055. The change in date of late blight appearance and its delay in years 2020 and 2055 is due to expected increase in temperature by 1.08 and 2.98°C respectively over the baseline year 2000. In Punjab, there were average 105 late blight favourable days out of 182 suitable potato growth days in year 2000; the number is likely to be increased to 135 and 140 days in 2020 and 2055 respectively in Punjab. In western Uttar Pradesh, potato growing season was warmer which would decrease late blight favourable days by 7 and 27 in 2020 and 2055, respectively. The number of sprays required to control late blight in potato seed crop would be 7.3 and 8 in future scenario (2020 and 2055) in comparison to 6.5 in baseline (2000) in Punjab. In contrast, there would be no change in number of sprays in year 2020 in western Uttar Pradesh, however, due to further rise in temperature in year 2055, it is likely to be reduced by two number of sprays over baseline year 2000. © 2015, Indian Potato Association. All rights reserved. Source


Pande P.C.,ICAR Central Potato Research Institute Campus | Luthra S.K.,ICAR Central Potato Research Institute Campus | Singh B.P.,ICAR Central Potato Research Institute | Gupta V.K.,ICAR Central Potato Research Institute Campus | Rawal S.,ICAR Central Potato Research Institute Campus
Potato Journal | Year: 2014

Kufri Garima is a medium maturing, main season, high yielding table purpose potato variety suitable for cultivation in Indo-gangetic plains and plateau regions. It is a clonal selection from a cross between PH/F-1045 and MS/82-638. Its plants are medium tall and vigorous with field resistance to late blight. It produces light yellow, ovoid tubers with shallow eyes and light yellow flesh. It possesses good keeping quality and has moderate tuber dry matter (18%). It is capable of yielding 35-40 t/ha under optimum agronomical practices. © 2014, Indian Potato Association. All rights reserved. Source


Kumar P.,Indian Central Soil Salinity Research Institute | Singh B.P.,ICAR Central Potato Research Institute | Kumar R.,ICAR Central Potato Research Institute Campus | Sandhu K.S.,Khalsa College | And 3 more authors.
Potato Journal | Year: 2014

A field study was conducted at Central Potato Research Institute Campus, Modipuram, India during 2008-2010 with two processing varieties Kufri Himsona and Kufri Chipsona-3 in main plot and five crop geometry treatments (67.5 × 20, 67.5 × 22.5, 67.5 × 25, 67.5 × 27.5 and 67.5 × 30 cm). Growth traits, processing grade tuber number and yield and processing quality parameters were not influenced by crop geometry. Tuber number/plant, percent processing grade tuber and average processing grade tuber weight steadily increased with increased intra-row spacing from 22 to 30 cm. Net returns ((Formula presented) 126,000/ha) and B:C ratio (2.69) was highest at 67.5 × 30 cm crop geometry. Processing grade tuber number and yield, net returns, B:C ratio was higher for cv. Kufri Chipsona-3 than Kufri Himsona. Tuber number/plant, tuber dry matter and chip yield was higher and oil per cent in chips were lower in cv. Kufri Himsona compared to Kufri Chipsona-3. Tuber dry matter yield, chip colour score and glucose content were statistically similar in both the cultivars. Study suggests that cvs Kufri Chipsona-3 and Kufri Himsona may be raised at 67.5 × 30 cm crop geometry for higher tuber yield, net returns and better processing quality. © 2014, Indian Potato Association. All rights reserved. Source

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