Effect of gibberellic acid (ga3) and plant growth promoting bacteria (azotobacter and azospirillum) on papaya (Carica Papaya l. cv. red lady) under different growing conditions

The present investigation entitled “Effect of seed treatments using Gibberellic Acid (GA3) and plant growth promoting bacteria under different growing conditions on germination and growth of papaya cultivar Red lady” was carried out using ten treatment viz T1: control, T2: GA3 @100 ppm, T3: GA3 @ 150 ppm, T4: GA3 @ 200 ppm , T5: GA3 @100 ppm + Azotobacter, T6: GA3 @ 150 ppm + Azotobacter, T7: GA3 @ 200 ppm + Azotobacter , T8:GA3 @100 ppm + Azospirillium, T9: GA3 @ 150 ppm + Azospirillium, T10: GA3 @ 200 ppm + Azospirillium under three growing conditions i.e. G1: Poly-house, G2: Net-house and G3: open field. The result revealed significant (P≤0.01) difference between treatments in all three selected growing conditions. Among all treatments, (T10: GA3 @ 200 ppm + Azospirillium) was found to be most superior for the germination and growth of papaya cultivar Red lady and poly – house condition favoured best palnt growth and germination followed by net house and open field. Therefore, the use of poly-house along with the pre-treated seed with the combination GA3 @ 200 ppm + Azospirillium is beneficial for increasing germination and growth of papaya cv. Red lady.