The present investigation was conducted under laboratory conditions to evaluate the suitability of different guava varieties for the growth and multiplication of the Bactrocera dorsalis. Three commonly cultivated guava varieties, namely Lucknow-49 (Sardar), Allahabad Safeda and Taiwan Pink, were selected for the study.

The results on reproductive traits revealed that guava varieties had a significant influence on the oviposition behaviour and reproductive potential of Bactrocera dorsalis. The pre-oviposition period was longest on Lucknow-49 (13.70 days), followed by Allahabad Safeda (12.92 days), and shortest on Taiwan Pink (11.90 days), indicating earlier initiation of egg laying on Taiwan Pink. The oviposition period was also comparatively longer on Lucknow-49 (11.98 days) and Allahabad Safeda (11.59 days), while it was shorter on Taiwan Pink (10.96 days). Similarly, the post-oviposition period was highest on Lucknow-49 (5.46 days) and lowest on Taiwan Pink (4.16 days). Fecundity varied significantly among the varieties, with the highest number of eggs laid on Taiwan Pink (111.8 eggs per female), followed by Allahabad Safeda (96.2 eggs), while the lowest was observed on Lucknow-49 (84.4 eggs). Egg hatching percentage was also highest on Taiwan Pink (88%), followed by Allahabad Safeda (80%) and Lucknow-49 (76%). These findings clearly indicate that Taiwan Pink provides more favourable conditions for reproduction of the pest.