Informatics Publishing Limited

T. Boopathi ¹, K. A. Pathak ¹

Affiliations
1 ICAR Research Complex for NEH Region, Mizoram Centre, Kolasib 796 081, Mizoram, IN

Abstract

Field experiment conducted to evaluate the toxicity of bio and synthetic pesticides to Lipaphis erysimi Kalt. and its predator, Ischiodon scutellaris (Fabricius) in broccoli crop at the experimental farm, ICAR Research Complex for NEH Region, Mizoram Centre, Kolasib, Mizoram, India showed that application of synthetic pesticides recorded 100% reduction in the L. erysimi population. Synthetic pesticides were highly toxic to I. scutellaris and resulted in 100% mortality. Imidacloprid 17.8% SL was less toxic to I. scutellaris when compared to other synthetic pesticides. Neem oil formulations were effective against L. erysimi and did not have any detrimental effect on the maggots of I. scutellaris.

Keywords

Lipaphis erysimi, Ischiodon Scutellaris, Biopesticides, Synthetic Pesticides, Safety, Toxicity.

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Santosh Kumar ¹, K. A. Pathak ², K. Kishore ³, R. Shukla ⁴, S. S. Solankey ⁴, D. K. Singh ⁵

Affiliations
1 ICAR-Regional Centre-NEH, Mizoram Centre, Kolasib Mizoram, IN
2 ICAR-RC for NEH, Sikkim Centre, Gangtok Sikkim, IN
3 Krisi Vigyan Kendra, MAMIT Mizoram, IN
4 Agricultural College, Bihar Agricultural University, Sabour, Bhagalpur Bihar, IN
5 Department of Genetics and Plant Breeding, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi U.P.

Abstract

The effect of bio-fertilizer was studied in banana accessions intensively collected from ICAR Research Complex for NEH Region, Mizoram Centre, Kolasib, Mizoram during 2009-2010. To assess the efficacy of different bio-fertilizer viz., Azospirillium, Azotobacter and phosphorus solubilizing bacteria (PSB) either alone or in combination was applied 20g per plant with recommended dose of FYM. The six treatments were arranged in a Randomized Block Design in three replications and spaced at 2.5 × 2.5 m in order to study its effect on growth, yield and quality attributing traits. All the characters were significantly increased except number of suckers and number of leaves due to application of each of the two-bio fertilizers either separately or in combination. Moreover in combination ofAzotobacter + PSB 20g per plant showed that more effective than either combination or in separately of another bio-fertilizers. This might be due to because biological nitrogen fixation depends appreciably on the available form of phosphorus. So the combined inoculation of nitrogen fixers and PSB may benefit the plant better (by providing both nitrogen as well as phosphorus) than either alone.

Keywords

Bio- Fertilizer, Nitrogen Fixation, Azospirillium, Azotobacter, PSB, Banana

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A. K. Vishwakarma ¹, Brajendra ¹, K. A. Pathak ¹, B. S. Kherawat ²

Affiliations
1 I.C.A.R. Research Complex for NEH Region, Mizoram Centre, Kolasib (Mizoram), IN
2 Division of Crop Improvement, Central Soil Salinity Research Institute, Karnal (Haryana), IN

Abstract

A study was carried out on varying doses of lime to maize in an acid soil of Mizoram to determine the effect of lime on yield and its attributes in maize. Lime treatments ranged from 0, 1, 1.5 and 2 t/ha. The maize variety RCM 1-1 was tested with or without added lime. Trials showed lime increased pH increased yield up to its highest dose of application. However, it did not significantly increase yield. Plant height in maize ranged from 170 cm when no lime (control) to 241.75 cm with 2t/ha of lime addition. Sixteen per cent, 35 per cent and 43 per cent increase in yield was observed at different levels of lime over no lime application. Almost 19 per cent, 35 per cent and 43 per cent increase in no. of grains/cob was recorded at different levels of lime over no lime use.

Keywords

Lime, Maize, No Lime, Yield, Mizoram.

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