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Field experiment was conducted for two years at Central Potato Research Institute Campus, Modipuram to studythe effect of organic+homeopathic and inorganic treatments on potato. Potato (Solanum tuberosum L.) harvestedafter curing were stored at elevated temperature (12±0.5oC) with CIPC, (Isopropyl-N-(3-chlorophenyl carbamate) asper modern technology adopted by farmers. The experiment was laid out in sub-plots with three sources of nutrition(organic+homeopathic nutrition) and inorganic treatments and three cultivars Kufri Bahar, Kufri Sindhuri and KufriChipsona-3 in main plots. Results showed that dry matter responded positively to inorganic treatment over organic.Variety Kufri Chipsona 3 recorded maximum dry matter followed by Kufri Sindhuri, while lowest dry matter wasreported in Kufri Bahar. Organic and homeopathic nutrition resulted in significantly superior chip colour as comparedto inorganic treatment. During both the years, potato chips prepared from cv. Kufri Chipsona 3 tubers with organicallytreated one had better chip colour. Organic and homeopathic nutrition significantly reduced mean reducing sugars instored potatoes as compared to inorganic treatment. During both the years of experiment, reducing sugars were lowin organically fertilized potatoes in comparison to inorganically fertilized crop. Mean sucrose content in potatoesstored at this temperature was at par in first year, while significantly lower values were observed in second year ofexperiment in organic+homeopathic treatment. Phenols content were significantly lower in organic and homeopathictreatment over inorganic nutrition across the genotypes in both the years during storage.

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Non-availability of disease-free quality seed material is the most important factor affecting low productivity of potato in India. Successive cropping of disease free minitubers under net house conditions, in the north western plains of India, can be an important intervention for utilizing this expensive vector free space and prevailing potato growing climate of the region in the most sustainable way. A field study was undertaken during 2016-18 to evaluate this hypothesis for its productivity and economics over single crop conventionally taken in the region. Minitubers of six potato varieties were grown in single and successive cropping patters under net house in the region. The summed yield attributes of their early (DCE) and late planted (DCL) successive crops were compared to single cropping (SC) on per meter square basis. Corresponding observations on morphological traits and yield attributes were quite encouraging. Minituber yield of under size, seed size and combined was 1.99, 1.88 and 1.98 times higher in double crop as compared to conventional single crop. As a result, cost of production declined (2.52 times) and net profit increased (3.15 times) in double crop. Cost of production per tuber was reduced in this technique from ₹ 2.01-1.28 per minituber. Higher profits and productivity under successive planting are achievable and this innovative technology can be easily adopted by the stakeholders for improving multiplication of early generation planting material, which would translate into availability of increased seed material after stipulated multiplications.

A field experiment was conducted at ICAR- CPRI, Regional Station, Gwalior, Madhya Pradesh to study the effect of soil solarization on weed population and multiplication of seed potatoes under aphid proof net house (Gen-0) and subsequently under field conditions (Gen-1) of 3 potato cultivars, viz. Kufri Mohan, Kufri Chipsona-1 and Kufri Lauvkar during 2017-18 and 2018-19. Treatments were replicated thrice in split plot design. The experimental area was solarized with black polythene and paddy straw mulch, whereas, unsolarized plots served as control. Mean monthly maximum temperature at all the soil depths was higher in polythene solarized plots followed by unsolarized and paddy straw mulch solarized plots under both net house and open field conditions. Soil nutrient properties, viz. pH, OC, available N, P and K were influenced by soil solarization both at planting and harvesting. Solarization with polythene and paddy straw mulch resulted in 88.23% and 41.05% reduction in weed population under net house and 74.80 and 37.79% reduction under open field conditions. Under net house conditions, total tuber yield was significantly higher with polythene solarization (29.33 t/ha), whereas, under open field conditions yield was maximum with paddy straw mulch (37.45 t/ha) over other two treatments respectively.

Potato (Solaum tuberosum L.) varieties, viz. Kufri Chandramukhi, Kufri Sindhuri and Kufri Chipsona 1 were evaluated for seed production in west-central Indian conditions. Days to the emergence and 50 % emergence were delayed in 10 and 17 October plantings (10.6, 10.5 days and 16.9, 16.6 days, respectively) and in the variety Kufri Sindhuri (10.6 days and 16.5 days). 7 November planting recorded higher growth attributes like emergence, number of stems, compound leaves except plant height. Delayed planting resulted in the reduction of plant height. Among the varieties, Kufri Sindhuri and Kufri Chipsona-1 recorded significantly higher growth parameters, viz. stem number, compound leaves and plant height. Higher seed size and total tuber number and per ha yield were recorded in 17 October onward plantings over other 10 October planting and highest was in 7 November planting (355 and 634 thousand/ha and 19.33 and 24.63 t/ha seed size and total tuber number and weight, respectively). Severe mosaic, mild mosaic and off types in each date of planting and varieties were below maximum permissible limit as per Indian minimum seed certification standards. Aphid population (weekly) was below the critical limit in all date of plantings and varieties. Gwalior region of west-central India is most suitable for seed production under prevailing climatic situation for getting higher seed yield.