Author(s):

Katasani Amareshwar Reddy and SS Saravanan

Abstract: The present experiment was conducted to determine the Effect of different bio fertilizers on plant growth, and flower yield of African marigold (Tagetes erecta L.) in the department of horticulture, Sam Higginbottom institute of agriculture technology and sciences, Prayagraj, (U.P), India. During the summer season 2019. Taken 8 bio fertilizers i.e. FYM 25/tones/hectare, Pecilomyces lilacinus 10kg/hectare (Bio pesticide), Pseudomonas Fluorescens 2.5kg/hectare (Plant Growth Promoting Rhizobacteria), Trichoderma viridae & 2.5kg/hectare (Bio pesticide), Bacillus Megaterium 13kg/acre (phosphate solubilizing bacteria), Fructuria eurantia 5kg/hectare (potash Mobilizing Bacteria) Azospirillium & Azotobacter 2.5kg/hectare (Nitrogen Fixing Bacteria) and Beauveria Basina 2.5kg/hectare all are the soil application 12 treatments were included in the trial viz., T₀ [FYM 25/tones/hectare]; T₁[Pecilomyces lilacinus + Pseudomonas fluorescens], T₂[Pseudomonas fluorescens + Trichoderma viridae], T₃[Trichoderma viridae + Beauveria basina], T₄[Beauveria basina + Azotobacter],T₅[Azospirillium +Fructuria eurantia], T₆[Fructuria eurantia + Bacillus megaterium], T₇ [Bacillus Megaterium + Pecilomyces lilacinus], T₈[Trichoderma viridae + Azotobacter + Bacillus megaterium], T₉[Trichoderma viridae + Azospirillium +Fructuria eurantia], T₁₀[Pseudomonas fluorescens + Azotobacter + Bacillus megaterium], T₁₁[Pseudomonas fluorescens + Azospirillium +Fructuria eurantia] were tested in three replication. The results reveal that bio fertilizers treatments had significant response on plant height (cm), Number of primary branches per plant, Number of secondary branches per plant, Plant spread (cm), First day to flower bud appearance, Days to 50% flowering, Number of flowers/plant, Flower diameter (cm), Individual flower weight (gm), Flower yield/plant (gm), Flower yield/hectare (tones).The maximum plant spread (N-S)[20.86], E-W [20.23] were produced by treatment T₁[Paecilomyces lilacinus (1.28mg/m2) + Pseudomonas(320mg/m2)], maximum primary branches(12.11) were produced by treatment T₇[Bacillus Megaterium (1.664mg/m2) + Paecilomyces lilacinus (1.28mg/m2)], maximum secondary branches(19.78) were produced by treatment T₄[Beauveria Basina (0.32mg/m2) + Azotobacter (0.32mg/m2)], first day to bud appearance (44.89)was seen in T3[Trichoderma viridae + Beauveria basina], and 50% of flowering (49.33) were seen in T₁₁[Pseudomonas (0.32mg/m2) + Azosprillium (0.320g/m2) + Fructuria.spp (1.664mg/m2)], maximum flower diameter (8.37) was seen in T₁₁[Pseudomonas (0.32mg/m2) + Azosprillium (0.320g/m2) + Fructuria. spp (1.664mg/m2)]and maximum plant height(56.3),flowers per plant(12.67),flower weight(2.79), maximum yield per plant (38.00) and maximum yield per hectare (6.33) T2[Pseudomonas fluorescens + Trichoderma viridae] and this is the best result in the treatments.

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