Informatics Publishing Limited

S. Irulandi ¹, R. Rajendran ², D. Samuel Stephen ¹, C. Chinniah ², P. K. Vinod Kumar ¹, K. Sreedharan ³

Affiliations
1 Regional Coffee Research Station, Kodaikanal TK. Thandigudi - 624216, Dindigul District, Tamil Nadu, IN
2 Agricultural College and Research Institute, Tamil Nadu Agricultural University, Madurai - 625104, Tamil Nadu, IN
3 Central Coffee Research Institute, Coffee Research Station, Chikmagalur - 577117, Karnataka, IN

Abstract

Laboratory and field experiments were carried out to evaluate the bio-efficacy of the white muscardine fungus, Beauveria bassiana (Balsamo) Vuill. and the exotic parasitoid Cephalonomia stephanoderis (Betrem) on coffee berry borer, Hypothenemus hampei (Ferrari) (Coleoptera: Scolytidae) at Pulney hills, Tamil Nadu, India, during the year 2004-05. Laboratory studies showed that B. bassiana at the dose of 1×10⁹ spores ml⁻¹ registered the highest per cent mycosis (65,09%), followed by 1×10⁸ spores ml⁻¹ (61.52%) and 1×10⁷ spores ml⁻¹ (56.39%) as against zero per cent mycosis In untreated check. The results from the field studies indicated that the cumulative mean per cent mycosis of B. bassiana on coffee berry borer recorded throughout the period of observations was highest at the dosage of 1×10⁹ ml⁻¹ (58.49%, followed by 1×10⁸ spores ml⁻³ (48.76%) and 1×10⁷ spores ml⁻¹ (39.27%). The results of the present study on C. stephanoderis revealed that among the 17 locations surveyed, the highest level of parasitism was observed in Nallurkadu (36.25%), followed by Solaikadu (34.45%) and Adalur (32.44%).

Keywords

Beauveria bassiana, Biological Control, Cephalonomia stephanoderis, Coffee Berry Borer, Hypothenemus hampei, IPM For Coffee.

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A. Ravikumar ¹, C. Chinniah ¹, S. Manisegaran ¹, S. Irulandi ², P. Mohanraj ³

Affiliations
1 Department of Agricultural Entomology, Agricultural College and Research Institute, Madurai (T.N.), IN
2 Krishi Vigyan Kendra, Pechiparai (T.N.), IN
3 Tamil Nadu Agricultural University, Coimbatore (T.N.), IN

Abstract

The present investigation was carried out to test the efficacy of biorationals against thrips, Scirtothrips dorsalis Hood on chilli. Field experiments were conducted at farmers holding during September 2009 - Febrauary 2010 and November 2009 - April 2010. Among biorationals tested, spinosad 45 SC @ 0.4ml 1^-1 and emamectin benzoate 5 SG @ 0.4g 1^-1 was found to be superior to the standard check dimethoate 30 EC @ 2ml 1^-1 registering the least population of 0.55 and 0.59 / leaf, followed by Beauveria bassiana @ 1 x 108 spores ml^-1 and neem oil 3 per cent which recorded thrips population of 1.01 and 1.11 / leaf. With regard to leaf curl damage by thrips, spinosad 45 SC @ 0.4 ml 1^-1 and emamectin benzoate 5 SG @ 0.4g 1^-1was very effective. Highest dry chilli yield of 1509 kg ha^-1 was registered in spinosad 45 SC @ 0.4ml 1^-1, which was on par with emamectin benzoate 5 SG @ 0.4g 1^-1 (1525 kg ha^-1) with respective additional income of Rs. 30,300 and Rs. 26,400. The highest cost benefit ratio (1:4.30) was obtained in spinosad 45 SC @ 0.4ml 1^-1 followed by 1:4.30 in emamectin 5 SG @ 0.4g 1^-1.

Keywords

Biorationals, Thrips, LCI, Yield, Chilli.

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M. I. Manivannan ¹, G. Anand ², S. Irulandi ³

Affiliations
1 ICAR-Krishi Vigyan Kendra, Thirupathisaram (T.N.), IN
2 Department of Plant Breeding and Genetics, Agricultural College and Research Institute, Madurai (T.N.), IN
3 Department of Fruits, Horticultural College and Research Institute, Periyakulam (T.N.), IN

Abstract

The present study was conducted to assess the existence of genotype × environmental (G × E) interactions and stability for yield and quality related traits in pineapple using four varieties over seven locations during the year 2012-13. Pooled analysis of variance over seven locations revealed that the genotypic variances were highly significant for all the characters which revealed considerable genetic variability in the population. Stability parameters revealed that the genotype 'Amritha' was found better under poor environments. 'Mauritius' and 'Amritha' showed stable and consistent performance for all quantitative and qualitative traits whereas, 'Mauritius' had above average response and high stability in better environments for yield only. Thus, genotypes 'Amritha' and 'Mauritius' may be utilized in hybrid breeding programme to exploit their consistent performance in all order of yield.

Keywords

Genotype x Environment Interaction, Stability, Quality, Yield.

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M. I. Manivannan ¹, S. Irulandi ²

Affiliations
1 Department of Horticulture, Agricultural College and Research Institute, Killikulam (T.N.), IN
2 Department of Fruit Crops and Post Harvest Technology, Horticultural College and Research Institute, Periyakulam (T.N.), IN

Abstract

An farm trial on integrated nutrient management in okra was undertaken at Krishi Vigyan Kendra, Kanyakumari to find out the combined effect of organic manures, biofertilizers and inorganic fertilizers over the traditional method in Okra hybrid CoBh H1 on yield, quality parameters and economic feasibility in Kanyakumari district. The trial was conducted during 2016 in five farmers field in a total area of 2 hectares located at Thuckalay block of Kanyakumari district. The assessment of integrated nutrient management was observed in Okra hybrid CoBh H1 with the technology options as recommended by TNAU CPG (2013) and KAU CPG (2011). The traditionally adopted farmers practice i.e., farm yard manure 25 t/ha+ imbalanced use of fertilizer was also included in the trial for assessment. Various yield parameters viz., days to 50% flowering, number of fruits per plant and yield (q/ha) and the benefit cost ratio was recorded for the individual farmer. Minimum number of days to flowering (52.0), higher number of fruits per plant (71.8), yield (274.8 q/ha) and cost benefit ratio (3.00) was registered with the technology as suggested by TNAU CPG (2013) wherein maximum number of days to flowering (55.2.0), minimum number of fruits per plant (47.6) , yield (230.2 q/ha) and cost benefit ratio (2.78) was recorded with farmers practice.

Keywords

INM, Okra, CoBh H1.

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