Журнал сельскохозяйственных наук и пищевых исследований
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Growth, Fruit Yield and Disease Index of Carica papaya L. Inoculated with Pseudomonas straita and Inorganic Fertilizers

Chandra KK

Experiment was conducted to study the effects of Pseudomonas straita and chemical fertilizers on growth, fruit yield and leaf mosaic virus in Carica papaya var. Sinta F1. The experiment comprised four treatments namely Farmers practices (T0- NP (Nitrogen: Phophorus) 100:50+10 kg FYM (Farm Yard Manure)/plant/year), Phosphorus Solubilizing Bacteria (T1- Pseudomonas straita @20 g culture /plant/year), Recommended fertilizer dose (T2- NPK 300:300:300+FYM 10 kg/plant/year), T3- Pseudomonas straita + NPK (300:300:300NPK+FYM 10 kg + P. straita 20 g /plant/year) in seven replications. The planting density was 2500 ha-1 (2 m × 2 m). The treatment effects found significant (p<0.05) for plant height, leaf number, leaf length, fruit weight, fruit volume and fruit yield while, nonsignificant for trunk girth, inter nodal length and pulp thickness. The treatment T3 plants occurred growth and fruit yield maximum followed with T2. Pseudomonas straita (T1) alone gave poorest result but its combination with NPK (T3) rendered highest number of fruit (48 fruit /plant) with an average weight of 675 g. The plant with T2 showed 18.18% higher leaves, 36.84% higher fruit weight and 41.03% higher yield compared to T0. Trends of Plant Disease Index (PDI) was declining by 50.36% with T1 followed with T3 (27.88%) and T2 (13.40%) compared T0. The treatment effects were positively correlated with plant height (r2=0.78), leaf number (r2=0.81), fruit yield (r2=0.97) and recorded negative for PDI (Plant Disease Index) (r2=0.30).