Himachal Journal of Agricultural Research

Banita Devi ¹, S. K. Guleria ¹, B. R. Thakur ¹

Affiliations
1 Department of Plant Pathology, CSKHPKV, Palampur (HP), Himachal Pradesh-176062, IN

Abstract

Forty inbred lines of maize were indexed against banded leaf and sheath blight (BLSB) caused by Rhizoctonia solani f. sp. sasakii. The lines were artificially inoculated under pot culture conditions. Out of forty, four inbred lines viz., BAJIM08-90-1-6- 1, BAJIM 6128, CML437-B-B, and CML 164 were found highly resistant (HR) with disease score of 1. Bajuara Makka 1, HKI 488, HKI 1105, CML 165, CML 336, CML 439, CML 437, BML 6, CML414, L 292, CML 437-B-B, L 265, BAJIM 95-60-5, CML 460, Sarhad-HSRB, LM 13, VQL 2, CML 169, and HKI 162 were rated as resistant with disease score of 3. The remaining inbred lines were highly susceptible.

Keywords

Reaction, Maize Inbred Lines/Hybrids, BLSB, Rhizoctonia solani f. sp. sasakii.

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B. R. Thakur ¹, Sachin Masand ¹

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

Abstract

Seven fungicidal treatments viz. Nativo (trifloxystrobin 25% + tebuconazole 50%) 75 WG at 75, 100 and 125 g/ha, Contaf (hexaconazole) 5 EC + Calixin (tridemorph) 80 EC at 100 + 90 ml/ha, trifloxystrobin 50 WG at 625 g/ha, Folicur (tebuconazole) 250 EW at 250 ml/ha and untreated control were evaluated during 2010 and 2011 at Palampur against blister blight in tea (Exobasidium vexans). The two years pooled data showed that the test fungicide Nativo 75 WG at 125 g/ha was effective against blister blight to yield 60.0% control. This was statistically significant to its constituents Folicur 250 EW and trifloxystrobin 50 WG at recommended doses. Folicur 250 EW at 250 ml/ha yielded 50.3% disease control whereas, trifloxystrobin 50 WG at 625 g/ha resulted in 37.0% disease control. Folicur 250 EW at 250 ml/ha was statistically at par with Contaf 5 EC + Calixin 80 EC at 100 + 90 g/ha to yield 47.4% disease control. No chlorosis, necrosis and epinasty were observed on juvenile pluckable shoots even at higher concentrations of the test fungicide. Hence, Nativo 75 WG at 125 g/ha was recommended against blister blight of tea.

Keywords

Blister Blight, Fungicidal, Nativo, Incidence, Severity, Tea.

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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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Dimple Rana ¹, S. K. Rana ¹, B. R. Thakur ¹

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

Abstract

Organic enriched composts viz., himcompost, vermicompost, farm yard manure, poultry manure and NADEP and organic formulations namely cow urine, beejamrit, panchgavya, tamarlassi, vermiwash and biosol were evaluated against Fusarium wilt of chickpea caused by Fusarium oxysporum f. sp. ciceris under in vitro conditions. Among all the organic formulations, Panchgavya showed maximum mycelial inhibition of 92.22 per cent followed by Biosol i.e. 72.22 per cent at 10 per cent concentration against the pathogen whereas, Tamarlassi was found least effective with 15.56 per cent mycelial inhibition. The extracts of all five organic composts showed antifungal properties against the pathogen even at 5 per cent concentration. At 25 per cent concentration Himcompost yielded maximum mycelial inhibition of 71.11 per cent followed by Vermicompost i.e. 65.27 per cent against the pathogen whereas, NADEP was found least effective i.e. 44.17 per cent inhibition. Hence, Himcompost and Panchgavya can be used as soil amendment and seed dresser, respectively for ecofriendly management of Fusarium wilt of chickpea.

Keywords

Organic Inputs, Fusarium oxysporum F. Sp. ciceris, Concentration, Mycelial Inhibition.

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Sunidhi ¹, B. R. Thakur ¹, Dimple Rana ¹

Affiliations
1 Department of Plant Pathology, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur-176062, IN

Abstract

Organic management components viz., composts and organic formulations were evaluated against the Ascochyta rabiei under in vitro conditions. Four composts viz., Vermicompost, FYM, Sheep & goat manure and Poultry manure were evaluated against the pathogen at five different concentrations i.e. 5, 10, 15, 20 and 25 per cent using Spore Germination Method. Among composts, Vermicompost at 25 per cent test concentration was found best among all with 67.29 per cent inhibition of spore germination of A. rabiei followed by FYM (48.47%). Four organic formulations viz., Panchgavya, Jeevamrit, Beejamrit and Tamarlassi were procured from Department of Organic Agriculture and Natural Farming, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur and evaluated under in vitro conditions at 2, 4, 6, 8 and 10 per cent concentrations using Spore Germination Method. Among organic formulations, Jeevamrit at 10 per cent test concentration was found best with 89.16 per cent inhibition of spore germination of A. rabiei followed by Tamarlassi (33.13%), Panchgavya (32.51%) and Beejamrit (29.35%).

Keywords

Organic Inputs, Ascochyta rabiei, In vitro, Spore Inhibition.

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