Himachal Journal of Agricultural Research

Shivani Rana ¹, Pardeep Kumar ¹, Parveen Sharma ¹, Amar Singh ¹, S. K. Upadhyay ¹

Affiliations
1 Department of Vegetable Science and Floriculture, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur 176 062, IN

Abstract

Bell pepper (Capsicum annuum L. var. grossum Sendt.) is an important commercial crop grown under protected condition in Himachal Pradesh. Being long duration under protected environment, it is the principle money spinner off-season crop. Production of bell pepper under protected conditions in the state is very low as compared to the National and International levels because of lack of suitable Cultivars and hybrids resistant to bacterial wilt. Among biotic stresses bacterial wilt caused by Ralstonia solanacearum is the most devastating disease under protected as well as open field conditions in mid hills of HP which reduces yield of capsicum to very low levels. Numerous attempts have been made to develop bacterial wilt resistant varieties, but till date no resistant hybrid is available. The best option to overcome this problem is grafting scions of horticulturally superior hybrids on resistant ischolar_mainstocks. The study revealed that chilli ischolar_mainstock PI-201232 was the most suitable bacterial wilt resistant ischolar_mainstock of bell pepper whereas; brinjal ischolar_mainstocks were not suitable for bell pepper scions.

Keywords

Bell Pepper, Grafting, Rootstock, Scion, Bacterial Wilt, Protected Cultivation.

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Viplove Negi ¹, Pardeep Kumar ¹, Parveen Sharma ¹, Desh Raj ¹, Amar Singh ², Binny Vats ¹

Affiliations
1 Department of Vegetable Science and Floriculture, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur-176 062, IN
2 Department of Plant Pathology, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur-176 062, IN

Abstract

An inter-specific tomato-potato graft study was undertaken in a naturally ventilated quonset polyhouse at Palampur during the autumn and winter seasons 2015. The treatments comprised of combination of two tomato hybrids [Avtar-7711 (S₁) and GS-600 (S₂)] as scions, three potato cultivars viz. Kufri Himsona (V₁), Kufri Himalini (V₂) and Kufri Giriraj (V₃) as ischolar_mainstocks and two grafting methods viz. tongue grafting (G₁) and cleft grafting (G₂). GS-600 tongue grafted on Kufri Himalini (V₂G₁S₂) resulted in maximum survival of grafted plants (93.25%) as well as grafting success rate (81.68%). Kufri Himalini (V₂) was found to be the best ischolar_mainstock for tomato scions which gave 2 maximum survival of grafted plants (87.89%) as well as grafting success rate (76.59%). Cleft grafting (G₂) resulted in maximum survival of grafted plants (84.13%) and grafting success rate (72.95%). Tomato scion GS-600 (S₂) was found to be the best scion for potato ischolar_mainstocks which resulted in a significantly higher survival of grafted plants (85.72%) and grafting success rate (73.85%) as well. Kufri Himalini+GS- 600 was the best ischolar_mainstock-scion combination giving maximum survival of grafted plants and grafting success rate irrespective of the grafting methods used. It is also concluded from the study that irrespective of the ischolar_mainstocks and grafting methods employed, scion GS-600 (S₂ always had better survival in grafted plants and a significantly higher grafting success rate at least for the three best performing treatments and grafting tomato on potato plants in compatible combinations had a significant impact on their survival.

Keywords

Pomato, Vegetable Grafting, Graft Compatibility, Inter-Specific Grafting, Solanaceae.

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B. R. Thakur ¹, Nisha Kumari ¹, Amar Singh ¹

Affiliations
1 Department of Plant Pathology, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur-176 062, IN

Abstract

Incidence of pea ischolar_main rot /wilt complex disease had been recorded in different agro climatic zone of pea growing areas of the Himachal Pradesh. In Zone IV, the disease had assumed severe form with incidence of 54.7% at HAREC, Kukumseri whereas, in Zone II and III, the status of the disease remained moderate with incidence of 17.7 to 35.3% at Bajaura and Palampur respectively. Two species of Fusarium viz., Fusarium solani f.sp pisi and Fusarium oxysporum f.sp. pisi were found to be associated with pea ischolar_main rot/wilt complex disease in Himachal Pradesh. Both species produced distinct symptoms when inoculated on pea seedlings in test tubes containing Hoagland's solution. F. solani f. sp. pisi was solely responsible to cause ischolar_main rots (necrotic and macerated ischolar_main tissues) of peas with yellowing of leaves from basal leaf to upward and then, ultimately collapse of infected pea plants whereas, F. oxysporum f. sp. pisi was responsible to cause wilting of peas (without ischolar_main rots) and then, ultimately collapse of infected pea plants.

Keywords

Pea Root Rot/Wilt Complex, Fusarium solani f.sp pisi and Fusarium oxysporum f.sp. pisi.

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Vibhuti Sharma ¹, Pardeep Kumar ¹, Parveen Sharma ¹, Amar Singh ², Pawan Kumar Sharma ³, N. D. Negi ⁴

Affiliations
1 Department of Vegetable Science and Floriculture, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur - 176 062, IN
2 Department of Pathology, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur - 176 062, IN
3 Department of Entomology, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur - 176 062, IN
4 Department of Horticulture, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur - 176 062, IN

Abstract

Present investigation was carried out for two successive years i.e. 2016-17 and 2017-18 to study the performance of grafted tomato with respect to growth, yield and quality of tomato under polyhouse conditions at Department of Vegetable Science and Floriculture, CSKHPKV, Palampur. Sixteen different ischolar_mainstocks of tomato were grafted with scion cultivar 'GS-600'. The experiment was laid out in a Randomized Block Design with three replications and cleft grafting method was used. Plants grafted on ischolar_mainstock LS-89 proved superior to other ischolar_mainstocks for days to first flowering and days to first harvest. For prolonged harvest duration plants grafted on tomato ischolar_mainstock Green Gourd found superior. Higher yield in terms of number of marketable fruits per plant, marketable fruit yield per plant and marketable fruit yield per square metre in were recorded plants grafted on tomato ischolar_mainstock Green Gourd.

Keywords

Rootstocks, Scion, Number of Marketable Fruits Per Plant, Fruit Yield Per Plant, Fruit Yield Per Square Metre.

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Divya Bhandhari ¹, Amar Singh ¹

Affiliations
1 Department of Plant Pathology, CSK Himachal Pradesh Vishvavidyalaya, Palampur-176 062, IN

Abstract

Colocasia leaf blight is the most devastating disease of colocasia incited by oomycetous pathogen Phytophthora colocasiae Raciborski. Use of chemicals in the management of this disease may lead to health and ecological hazards thus in the present investigation, the efficacy of botanicals were evaluated both under in-vitro and in-vivo conditions against colocasia blight. Four different botanicals which included leaf extracts of Azadirachta indica (neem), Melia azedarach (drek) and botanical formulations of lantana ark and dashparni were evaluated against P. colocasiae at four concentrations ( 5, 10, 12 and 15 per cent). Lantana ark was found to be most effective under in-vitro as well as in-vivo conditions at 15 per cent concentration resulting in 72.3 per cent mycelial growth inhibition and 65 per cent disease control, respectively followed by Azadirachta indica.

Keywords

Colocasia, Botanicals, Colocasia Blight, Phytophthora colocasiae.

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Prashant Sharma ¹, Uttam Chandel ¹, Gopal Katna ¹, Amar Singh ¹

Affiliations
1 Department of Genetics and Plant Breeding, College of Agriculture CSK Himachal Pradesh KrishiVishvavidayalaya, Palampur, Himachal Pradesh, IN

Abstract

The experimental material consisted of 25 lines, 2 testers, their 50 crosses and two checks viz., Palam Sankar Makka-2 and PSCL 4640 were evaluated in RBD during Kharif 2020 against turcicum leaf blight (TLB), maydis leaf blight (MLB) and banded leaf and sheath blight (BLSB) under natural epiphytotic conditions at SAREC, Kangra. Among lines, 14 showed resistant to BLSB and 15 were resistant to TLB. 18 lines were moderately resistant to MLB. Three crosses viz., L₃ × T₁ , L₂₄ × T₂ and L₂₅ × T₁ exhibited resistant towards BLSB, MLB and TLB. The cross combinations can be further evaluated for yield and other characters and released as promising hybrids resistant to TLB, MLB and BLSB.

Keywords

Maize, TLB, MLB, BLSB

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