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Rajendra Prasad ¹, Vedna Kumari ²

Affiliations
1 Department of Agronomy, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur-176 062, IN
2 Department of Crop Improvement, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur-176 062, IN

Abstract

The present study was carried out to assess the impact of rainfall on the spread, production and yields of rabi oilseed crops in Himachal Pradesh during the past forty years (1968-69 to 2007-08). Year-wise trend analysis in rapeseed-mustard indicated a significant increase in area, production and productivity while a significant decrease was observed in linseed with time. Pentadwise shift indicated 71.7% increase in the area under rapeseed-mustard during 8^th pentad over 1^st pentad which might be due to 92.6% increase in rain fall during 8^th pentad over 1^st pentad. The technological inputs including improved varieties resulted in 105.6% increase in production and 20.4% increase in productivity. Pentad-wise shift in rapeseed-mustard area also exhibited a significant positive correlation with rainfall. In linseed, pentad-wise shift indicated a drastic reduction in area (78.8%), production (89.3%) and productivity (51.2%) during 8^th pentad over 1^st pentad. There was a negative and non-significant correlation of area with rainfall. The study indicates that under rainfed conditions, the farmers preferred rapeseed-mustard over linseed. Linear regression analysis indicated that the increase in seasonal rainfall may not be the sole reason for area expansion in rapeseedmustard. On the other hand, a much part of variation in area as well as production in linseed appeared be due to variation in seasonal rainfall.

Keywords

Area, Production, Rapeseed-Mustard, Linseed, Rainfall, Mann-Kendall Trend Test.

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Rajendra Prasad ¹, Vedna Kumari ²

Affiliations
1 Department of Agronomy, Forages & Grassland Management, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur-176062, IN
2 Department of Crop Improvement, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur-176062, IN

Abstract

The present study was carried out to assess the influence of rainfall on the changes in spread, production and productivity of sesame in Himachal Pradesh during past forty years (1968-69 to 2007-08). The year-wise and pentad-wise trend analysis carried out following Mann- Kendall non parametric trend test indicated a significant decrease in area while no trend in production was observed under this crop. The dominance index also exhibited a gradual decrease in sesame area during past four decades. There was 48.7% reduction in area and 26.1% in production while only 1.2% decrease in quantum of rainfall was observed during 8^th pentad over 1^st pentad. The relationship between percent shift in area, production and productivity vis-à-vis rainfall was not significant. Hence, 41.4% increase in productivity during 8^th pentad over the 1^st pentad could be attributed to agro-technological interventions including varietal improvement.

Keywords

Sesame, Area, Production, Rainfall, Mann-Kendall Trend Test.

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Shweta Sharma ¹, Viveka Katoch ¹, Sanjay Chadha ¹, Vedna Kumari ²

Affiliations
1 Department of Vegetable Science and Floriculture, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur-1760 62, IN
2 Department of Genetics and Plant Breeding, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur-1760 62, IN

Abstract

Bacterial wilt is the most destructive disease in the tropical, subtropical, and temperate regions of the world, causing a heavy economic loss in eggplant. The chemical control of the disease is not effective and the cultivation of bacterial wilt resistant varieties is the only solution to overcome the disease, but cultivated resistant varieties are gradually becoming susceptible to the disease. Thus, an experiment was conducted to screen out twenty F s developed through diallel mating design along with parents viz., Res-1, Res-2, H-8, Arka 1 Nidhi, and Arka Keshav for bacterial wilt resistance under mid-hill conditions of Himachal Pradesh over the seasons. These were categorized according to the Sitaramiah scale (1981) as the observation was recorded on plant survival. The cross combinations were found immune, highly resistant, and moderately resistant to bacterial wilt and can be utilized to develop resistant cultivar(s) through crop improvement.

Keywords

Eggplant, Diallel, Bacterial Wilt, Categorization.

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