The present study was undertaken to bring out the best combination of microbial consortium on effect of biostimulant for the growth and yield of African marigold (Tagetes erecta L.) hybrid L3. The experiment was conducted in open field condition in a randomized block design with 10 treatments combinations and replicated thrice at ICAR-KVK, Bagalkot during the year 2017. Application of bio-control agents viz., Trichoderma harzianum, Pseudomonas fluorescens, Bacillus subtilis were applied in different combinations through soil application (SA), seedling treatment (ST), and foliar spray/application (FA) and were evaluated for growth promotion and disease management in marigold. The bio-stimulant, vermiwash was applied as foliar spray at four intervals at 30, 45, 60 and 75 days after transplanting. Observations were recorded on marigold growth, flowering and yield parameters. The growth parameters viz., plant height, number of primary branches per plant, plant spread, number of leaves per plant were recorded highest in treatment T8 compared to other treatments. Days taken for first flowering, days taken for 50% flowering, flower diameter, individual flower weight, flowering duration, number of flowers per plant, flower yield per plant and flower yield per hectare were also recorded highest in treatment T8 which received combined soil application of 50% recommended dose of fertilizers (63:30:30 Kg NPK ha -1 ) + soil application of bioagents @ 3kg/acre followed by seedling dip and foliar spray of Trichoderma harzianum (10ml/litre) +Pseudomonas fluorescens (10ml/litre)+ Bacillus subtilis (10ml/litre) and vermiwash (0.5%) compared to control. The disease incidence (PDI) of leaf spot and flower blight was observed less in T8 whereas, leaf spot and flower blight was high in control. Hence, treatment T8 was best for growth, development and disease management through organic way in marigold.
The study pertaining to the effect of summer season on correlation analysis in bird of paradise (Strelitzia reginae) was carried out among forty progenies. The results of correlation analysis for twelve parameters (plant height, stem girth, leaf length, leaf width, number of leaves per plant, number of suckers/m 2 , flower stalk length, flower stalk girth, spath length, no. of bracts, vase life and no. of flowers/ m 2 ) at genotypic and phenotypic levels revealed that number of flowers per m 2 of progenies during summer, 2011 showed positive and significant correlations with plant height (0.357 and 0.237) and number of suckers/ m2 (0.880 and 0.899). Whereas, it showed positive and significant correlation with stem girth (0.203), leaf width (0.202) and flower stalk girth (0.265) at genotypic level only. While during summer 2012, number of flowers per m 2 showed positive correlations with plant height (0.265 and 0.242), stem girth (0.232 and 0.215), number of suckers/ m 2 (0.913 and 0.900) and flower stalk length (0.268 and 0.249) at genotypic and phenotypic levels. Hence, the selection of these characters would be effective in improving yield in bird of paradise crop.
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